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  • JAAS : on Callback ( Interesting based on HTTP headers )

    - by VJS
    I am using NameCallback and PasswordCallback for username and password.For username and password, popup comes on browser and when i enter username ans password, JAAS authenticates my request. On the wireshark, I have seen that 401 Unauthorized message (WWW-Authenticate header)comes and when i enter username/password HTTP request with credentials generate ( with Authorization header) and goes to server. My requirement : I don't want pop up to come.My application on other server having username / password, so once it received 401 then based on some logic it will generate HTTP request with Authorization header / credentials and sent it back. FLow : User - Other Server - My Tomcat5.5 Here on Other Server, nobody is available to enter username/password manually.Application is deployed and it will only generate HTTP request with credential and sent it back to tomcat. Can we have any other callback which behave like this.Need your help.Please provide me feedback as well related to approach.

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  • JDBC Pagination

    - by Zeeshan
    Hi, I want to implement pagination using JDBC. The actual thing I want to know is "How can i get first 50 and then next 50 records from database for page 1 and 2 respectively" My Query is Select * from data [data table contains 20,000 rows] For page #1 I get 50 records and for page #2 I want to get next 50 records. How can I implement it efficiently in JDBC? I have searched and found that rs.absolute(row) is the way to skip first page records but it takes some amount of time on large result sets and I don't want to bear this amount of time. Also, I don't want to use rownum and limit + offset in query because these are not good to use in query, I dont know why, still I don't want to use it in query. Can anyone help me how to get limited ResultSet for pagination or is there any way JDBC is giving us?

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  • How do I run compiled java classes with GPU libraries (Jogamp JOCL)?

    - by jam383
    Does anyone know how to run the java code from the command line with dependency on GPU libraries in this case Jogamps JOCL. I have compiled a test program HelloJOCL.java but I get an error during run time. I tried javac -classpath "./lib/jocl.jar:./lib/jocl-natives-macosx-universal.jar:./lib/jocl-natives-linux-i586.jar:./lib/jocl-natives-linux-amd64.jar:./lib/gluegen-rt.jar:./lib/gluegen-rt-natives-linux-amd64.jar:./lib/gluegen-rt-natives-macosx-universal.jar:./lib/gluegen-rt-natives-linux-i586.jar" ./HelloJOCL.java java -classpath "./lib/jocl.jar:./lib/jocl-natives-macosx-universal.jar:./lib/jocl-natives-linux-i586.jar:./lib/jocl-natives-linux-amd64.jar:./lib/gluegen-rt.jar:./lib/gluegen-rt-natives-linux-amd64.jar:./lib/gluegen-rt-natives-macosx-universal.jar:./lib/gluegen-rt-natives-linux-i586.jar:." HelloJOCL but get this error Exception in thread "main" java.lang.NoClassDefFoundError: com/jogamp/opencl/CLContext at java.lang.Class.getDeclaredMethods0(Native Method)

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  • two log4j files for EAR with two modules

    - by nicktmro
    Hi, I have an EAR that is made up of two modules. Both expose services and share common code. Imagine that the ear has a common.jar shared by a webservices.war and webapp.war. I use log4j to log the activities. I would like to be able to have two log files (webservices.log and webapp.log) capturing the events that are specific to each of them plus all the stuff that is handled by the common.jar. How should I configure my categories and my appenders to achieve this? At the moment I have the following packages: com.myapp for shared stuff com.myapp.webservices for the webservices and com.myapp.webapp for the webapp. My problem is that I don't know how I can capture the com.myapp (common stuff) in both log files by using a single log4j configuration file. I have tried setting up multiple configuration files but when JBoss would work OK Websphere would break and the other way round... Thank you

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  • Display BLOB (image) through JSP

    - by jMarcel
    I have a code to show a chart o employees. The data (name, phone, photo etc) are stored in SQLServer and displayed through JSP. Showing the data is ok, except the image .jpg (stored in IMAGE=BLOB column). By the way, I've already got the image displayed (see code below), but I dont't know how to put it in the area defined in a .css (see code below, too), since the image got through the resultSet is loaded in the whole page in the browser. Does anyone knows how can I 'frame' the image ? <% Connection con = FactoryConnection_SQL_SERVER.getConnection("empCHART"); Statement stSuper = con.createStatement(); Statement stSetor = con.createStatement(); Blob image = null; byte[] imgData = null; ResultSet rsSuper = stSuper.executeQuery("SELECT * FROM funChart WHERE dept = 'myDept'"); if (rsSuper.next()) { image = rsSuper.getBlob(12); imgData = image.getBytes(1, (int) image.length()); response.setContentType("image/gif"); OutputStream o = response.getOutputStream(); //o.write(imgData); // even here we got the same as below. //o.flush(); //o.close(); --[...] <table style="margin: 0px; margin-top: 15px;"> <tr> <td id="photo"> <img title="<%=rsSuper.getString("empName").trim()%>" src="<%= o.wite(imageData); o.flush(); o.close(); %>" /> </td> </td> <td id="empData"> <h3><%=rsSuper.getString("empName")%></h3> <p><%=rsSuper.getString("Position")%></p> <p>Id:<br/><%=rsSuper.getString("id")%></p> <p>Phone:<br/><%=rsSuper.getString("Phone")%></p> <p>E-Mail:<br/><%=rsSuper.getString("Email")%></p> </td> </table> And here is the fragment supposed to frame the image: #photo { padding: 0px; vertical-align: middle; text-align: center; width: 170px; height: 220px; } Thanks in advance !

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  • How to make Eclipse compile with Java 1.5 in Mac OS X Leopard (10.5)?

    - by whiskeyspider
    I have been developing in Snow Leopard (10.6). I believe I have some Java6-only API features and I'd like to find these. I moved my project to Leopard (10.5) -- since Snow Leopard does not support Java 1.5 -- but I am so far unable to make Eclipse give compile errors for a Java API call which I know to have been added in 1.6. Here is what I have done: Project properties - Java Compiler - set everything to 1.5. Preferences - Java - Installed JREs - selected JVM 1.5.0. Project properties - Java Build Path - Libraries - says JRE System Library [JVM 1.5.0] What am I missing? Is there another way to find Java API calls added in 1.6 when using Eclipse in Snow Leopard? Thanks.

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  • J2ME linking interfaces.

    - by user554031
    Hey guys, I've been working with J2ME for a short while, however I've been unable to find anything regarding my query. I'm wanting to link interfaces, I.E A to B to C. Similar to a card layout. Information on each interface changes based on the choices the user made previously. For example City - Cinema - Cinema Listings. The eventual target is to create a MIDlet that displays information from a database (I understand a midlet needs to connect to a servlet which connects to the DB). Thanks in advance for you're time.

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  • toString() in Java

    - by Allain Lalonde
    A lead developer on my project has taken to referring to the project's toString() implementations as "pure cruft" and is looking to remove them from the code base. I've said that doing so would mean that any clients wishing to display the objects would have to write their own code to convert the object to string, but that was answered with "yes they would". Now specifically, the objects in this system are graphic elements like rectangles, circles, etc and the current representation is to display x, y, scale, bounds, etc... So, where does the crowd lie? When should you and when shouldn't you implement toString?

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  • The Next Frontier: Java Embedded @ JavaOne

    - by Kristin Rose
    Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Now more than ever, the Java platform is the best technology for many embedded use cases. Java’s platform independence, high level of functionality, security, and developer productivity, address the key pain points in building embedded solutions... and that’s not just our opinion. Take a look at the new IDC report on Oracle’s stewardship of Java, “Java: Two and a half Years After the Acquisition” (doc #236309, August 2012). Java already powers around 3 billion devices worldwide, with traditional desktops and servers being only a small portion of that, and the ‘Internet of Things‘ is just really starting to explode. It is estimated that within five years, intelligent and connected embedded devices will outnumber desktops and mobile phones combined, and will generate the majority of the traffic on the Internet. Is your platform and services strategy ready for the coming disruptions and opportunities? It should come as no surprise that Oracle is enthusiastically focused on Java for Embedded .  New this year, Oracle is demonstrating its further commitment to the embedded marketplace by offering, for the first time, a dedicated conference focused on the business aspects of embedded Java: Java Embedded @ JavaOne. Co-located with the technically-focused JavaOne conference, Java Embedded @ JavaOne will run for two days in San Francisco targeting C-level executives, architects, business leaders, and decision makers. With 24 inspired business sessions with expert speakers from 18 prominent companies driving the next generation of Java Embedded business solutions (such as Cinterion, ARM, Hitachi and Rockwell Automation), attendees will learn how Java Embedded technologies and solutions can offer compelling value and a clear path forward to business efficiency and agility. You’ll also see how Oracle’s comprehensive technology portfolio can deliver a complete ‘Machine to Machine’ platform, from device to datacenter, resulting in a highly secure, resilient, high-performance and cost-effective solution. Seating is limited and we expect a lot of interest in this new event, so please register now! Note that if you are already attending the Oracle OpenWorld or JavaOne conferences, you can attend this conference for only $100 more. Watch my video below to find out more. I hope to see you there! Judson Althoff SVP of WWA&C Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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  • Generating Java classes out of XMLSchema.xsd using JAXB

    - by Christian Schulz
    I'm using jaxb to generate java classes out of a xml schema. The schema imports XMLSchema.xsd and its content is used as an element in the document. If I remove the import and the reference to "xsd:schema" respectively then the binding compiler generates successfully the classes. If I do not then it would produce the following errors, which are the same if I would try to generate Java classes from the XMLSchema.xsd only! C:\Users\me"%JAXB%/xjc" -extension -d tmp/uisocketdesc -p uis.jaxb uisocketdesc.xsd -b xml_binding_test.xml -b xml_binding_test_2.xml -b xml_binding_test_3.xml parsing a schema... compiling a schema... [ERROR] A class/interface with the same name "uis.jaxb.ComplexType" is already in use. Use a class customization to resolve this conflict. line 612 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "ComplexType" is generated from here. line 440 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] A class/interface with the same name "uis.jaxb.Attribute" is already in use. Use a class customization to resolve this conflict. line 364 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "Attribute" is generated from here. line 1020 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] A class/interface with the same name "uis.jaxb.SimpleType" is already in use. Use a class customization to resolve this conflict. line 2278 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "SimpleType" is generated from here. line 2222 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] A class/interface with the same name "uis.jaxb.Group" is already in use. Use a class customization to resolve this conflict. line 930 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "Group" is generated from here. line 727 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] A class/interface with the same name "uis.jaxb.AttributeGroup" is already in use. Use a class customization to resolve this conflict. line 1062 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "AttributeGroup" is generated from here. line 1026 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] A class/interface with the same name "uis.jaxb.Element" is already in use. Use a class customization to resolve this conflict. line 721 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Relevant to above error) another "Element" is generated from here. line 647 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 1020 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 364 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 2278 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 2222 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 930 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 727 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 440 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 612 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 1026 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 1062 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] Two declarations cause a collision in the ObjectFactory class. line 647 of "http://www.w3.org/2001/XMLSchema.xsd" [ERROR] (Related to above error) This is the other declaration. line 721 of "http://www.w3.org/2001/XMLSchema.xsd" Failed to produce code.

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  • Agile Database Techniques: Effective Strategies for the Agile Software Developer – book review

    - by DigiMortal
       Agile development expects mind shift and developers are not the only ones who must be agile. Every chain is as strong as it’s weakest link and same goes also for development teams. Agile Database Techniques: Effective Strategies for the Agile Software Developer by Scott W. Ambler is book that calls also data professionals to be part of agile development. Often are DBA-s in situation where they are not part of application development and later they have to survive large set of applications that all use databases different way. Of course, only some of these applications are not problematic when looking what database server has to do to serve them. I have seen many applications that rape database servers because developers have no clue what is going on in database (~3K queries to database per web application request – have you seen something like this? I have…) Agile Database Techniques covers some object and database design technologies and gives suggestions to development teams about topics they need help or assistance by DBA-s. The book is also good reading for DBA-s who usually are not very strong in object technologies. You can take this book as bridge between these two worlds. I think teams that build object applications that use databases should buy this book and try at least one or two projects out with Ambler’s suggestions. Table of contents Foreword by Jon Kern. Foreword by Douglas K. Barry. Acknowledgments. Introduction. About the Author. Part One: Setting the Foundation. Chapter 1: The Agile Data Method. Chapter 2: From Use Cases to Databases — Real-World UML. Chapter 3: Data Modeling 101. Chapter 4: Data Normalization. Chapter 5: Class Normalization. Chapter 6: Relational Database Technology, Like It or Not. Chapter 7: The Object-Relational Impedance Mismatch. Chapter 8: Legacy Databases — Everything You Need to Know But Are Afraid to Deal With. Part Two: Evolutionary Database Development. Chapter 9: Vive L’ Évolution. Chapter 10: Agile Model-Driven Development (AMDD). Chapter 11: Test-Driven Development (TDD). Chapter 12: Database Refactoring. Chapter 13: Database Encapsulation Strategies. Chapter 14: Mapping Objects to Relational Databases. Chapter 15: Performance Tuning. Chapter 16: Tools for Evolutionary Database Development. Part Three: Practical Data-Oriented Development Techniques. Chapter 17: Implementing Concurrency Control. Chapter 18: Finding Objects in Relational Databases. Chapter 19: Implementing Referential Integrity and Shared Business Logic. Chapter 20: Implementing Security Access Control. Chapter 21: Implementing Reports. Chapter 22: Realistic XML. Part Four: Adopting Agile Database Techniques. Chapter 23: How You Can Become Agile. Chapter 24: Bringing Agility into Your Organization. Appendix: Database Refactoring Catalog. References and Suggested Reading. Index.

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  • terminating java applet thread on page unload

    - by Hammad Tariq
    Hello, I have got a problem here in terminating the threads. The problem is that I am using applet thread to access JS DOM and manipulate innerHTML of a span to right the Thread Name as the innerHTML. It works fine until I keep refreshing the page but if I dont give it a sleep of like 200ms and go to another page which dont have any applet on it, it will give me an error in firebug console: document.getElementById("userName") is null What I am suspecting is, although I send an interrupt on stop and I have also tried the same by setting a flag variable of running in run while loop, the thread executes much faster than the time JVM takes to unload it and I get my page changed in browser but applet is still trying to find an element with id userName. Is that true? Is there any work around of it? Is there any way to know how many threads are running at the moment? Is there any kill all command to send on destroy()? I have searched a lot, seen all the API of java threads and applets, couldn't get this to work. Below is the code: import java.applet.Applet; import netscape.javascript.*; //No need to extend JApplet, since we don't add any components; //we just paint. public class firstApplet extends Applet { /** * */ private static final long serialVersionUID = 1L; firstThread first; boolean running = false; public class firstThread extends Thread{ JSObject win; JSObject doc; firstThread second; public firstThread(JSObject window){ this.win = window; } public void run() { try{ System.out.println("running... "); while (!isInterrupted()){ doc = (JSObject) win.getMember("document"); String userName = Thread.currentThread().getName(); //String userName = "John Doe"; String S = "document.getElementById(\"userName\").innerHTML = \""+userName+"\";"; doc.eval(S); Thread.sleep(5); } }catch(Exception e){ System.out.println("exception in first thread... "); e.printStackTrace(); } } } public void init() { System.out.println("initializing... "); } public void start() { System.out.println("starting... "); JSObject window = JSObject.getWindow(this); first = new firstThread(window); first.start(); running = true; } public void stop() { first.interrupt(); first = null; System.out.println("stopping... "); } public void destroy() { if(first != null){ first = null; } System.out.println("preparing for unloading..."); } } Thanks

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  • Oracle Social Network Developer Challenge: TEAM Informatics

    - by Kellsey Ruppel
    Originally posted by Jake Kuramoto on The Apps Lab blog. Here comes another Oracle Social Network Developer Challenge entry, this one courtesy of TEAM Informatics (@teaminformatics). As their name suggests, their entry was a true team effort, featuring the work of Jon Chartrand, Deepthi Sanikommu, Dmitry Shtulman, Raghavendra Joshi, and Daniel Stitely with Wayne Boerger doing the presentation honors. Speaking of the presentation, Wayne’s laptop wouldn’t project onto the plasma we had in the OTN Lounge, but luckily, Noel (@noelportugal) had his iPad and VGA dongle in his backpack of goodies, so they were able to improvise by using the iPad camera to capture Wayne’s demo and project the video to the plasma. Code will find a way. Anyway, TEAM built Do Over, an integration with Atlassian’s JIRA, coincidentally something I’ve chatted with Rich (@rmanalan) about in the past. The basic idea is simple; integrate JIRA issues with Oracle Social Network to expand and centralize the conversation around issue resolution. In Dmitry’s words: We were able to put together a team on fairly short notice and, after batting a few ideas around, decided to pursue an integration with JIRA, an issue and project tracking tool used in-house at TEAM.  After getting to know WebCenter Social, we saw immediate benefits that a JIRA integration could bring, primarily due to the fact that JIRA only allows assignment of an issue to one person at a time.  Integrating Social would allow collaboration and issue resolution to happen right from the JIRA Issue interface. TEAM tackled a very common pain point among developers, i.e. including everyone who needs to be involved in issue resolution into a single thread. If you’ve ever fixed bugs or participated in that process, you’ll know that not everyone has access to the issue resolution system, which makes consolidating discussion time-consuming and fragmented. Why? Because we typically use email as the tool for collaboration. Oracle Social Network allows for all parties involved to work in a single, private and secure conversation, and through its RESTful Public API, information from external systems like JIRA can be brought in for context. TEAM only had time to address half the solution, but given more time, I’m sure they would have made the integration bidirectional, allowing for relevant commentary to be pushed back to JIRA, closing the loop. Here are some screenshot of their integration. #gallery-1 { margin: auto; } #gallery-1 .gallery-item { float: left; margin-top: 10px; text-align: center; width: 33%; } #gallery-1 img { border: 2px solid #cfcfcf; } #gallery-1 .gallery-caption { margin-left: 0; } When Oracle Social Network is released, TEAM will have something they use internally to work on issues, and maybe they’ll even productize their work and add it to the Atlassian Marketplace so that other JIRA users can benefit from the combination of Oracle Social Network and JIRA. Thanks to everyone at TEAM for participating in our challenge. We hope they had a good experience. Look for the details of the other entries this week. Be sure to check out a full recap from Dmitry over on the TEAM blog.

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  • Real-time graphing in Java

    - by thodinc
    I have an application which updates a variable about between 5 to 50 times a second and I am looking for some way of drawing a continuous XY plot of this change in real-time. Though JFreeChart is not recommended for such a high update rate, many users still say that it works for them. I've tried using this demo and modified it to display a random variable, but it seems to use up 100% CPU usage all the time. Even if I ignore that, I do not want to be restricted to JFreeChart's ui class for constructing forms (though I'm not sure what its capabilities are exactly). Would it be possible to integrate it with Java's "forms" and drop-down menus? (as are available in VB) Otherwise, are there any alternatives I could look into? EDIT: I'm new to Swing, so I've put together a code just to test the functionality of JFreeChart with it (while avoiding the use of the ApplicationFrame class of JFree since I'm not sure how that will work with Swing's combo boxes and buttons). Right now, the graph is being updated immediately and CPU usage is high. Would it be possible to buffer the value with new Millisecond() and update it maybe twice a second? Also, can I add other components to the rest of the JFrame without disrupting JFreeChart? How would I do that? frame.getContentPane().add(new Button("Click")) seems to overwrite the graph. package graphtest; import java.util.Random; import javax.swing.JFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.ValueAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.data.time.Millisecond; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; public class Main { static TimeSeries ts = new TimeSeries("data", Millisecond.class); public static void main(String[] args) throws InterruptedException { gen myGen = new gen(); new Thread(myGen).start(); TimeSeriesCollection dataset = new TimeSeriesCollection(ts); JFreeChart chart = ChartFactory.createTimeSeriesChart( "GraphTest", "Time", "Value", dataset, true, true, false ); final XYPlot plot = chart.getXYPlot(); ValueAxis axis = plot.getDomainAxis(); axis.setAutoRange(true); axis.setFixedAutoRange(60000.0); JFrame frame = new JFrame("GraphTest"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ChartPanel label = new ChartPanel(chart); frame.getContentPane().add(label); //Suppose I add combo boxes and buttons here later frame.pack(); frame.setVisible(true); } static class gen implements Runnable { private Random randGen = new Random(); public void run() { while(true) { int num = randGen.nextInt(1000); System.out.println(num); ts.addOrUpdate(new Millisecond(), num); try { Thread.sleep(20); } catch (InterruptedException ex) { System.out.println(ex); } } } } }

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  • using java Calendar

    - by owca
    I have a simple task. There are two classes : Ticket and Date. Ticket contains event, event place and event date which is a Date object. I also need to provide a move() method for Date object, so I used Calendar and Calendar's add(). Everything looks fine apart of the output. I constantly get 5,2,1 as the date's day,month,year. Lines with asterix return proper date. The code : Ticket class : public class Ticket { private String what; private String where; private Date when; public Ticket(String s1, String s2, Data d){ this.what = s1; this.where = s2; this.when = d; } *public Date giveDate(){ System.out.println("when in giveDate() "+this.when); return this.when; } public String toString(){ return "what: "+this.what+"\n"+"where: "+this.where+"\n"+"when: "+this.when; } } Date class: import java.util.Calendar; import java.util.GregorianCalendar; public class Date { public int day; public int month; public int year; public Date(int x, int y, int z){ *System.out.println("x: "+x); *System.out.println("y: "+y); *System.out.println("z: "+z); this.day = x; this.month = y; this.year = z; *System.out.println("this.day: "+this.day); *System.out.println("this.month: "+this.month); *System.out.println("this.year: "+this.year); } public Date move(int p){ *System.out.println("before_change: "+this.day+","+this.month+","+this.year); Calendar gc = new GregorianCalendar(this.year, this.month, this.day); System.out.println("before_adding: "+gc.DAY_OF_MONTH+","+gc.MONTH+","+gc.YEAR); gc.add(Calendar.DAY_OF_YEAR, p); System.out.println("after_adding: "+gc.DAY_OF_MONTH+","+gc.MONTH+","+gc.YEAR); this.year = gc.YEAR; this.day = gc.DAY_OF_MONTH; this.month = gc.MONTH; return this; } @Override public String toString(){ return this.day+","+this.month+","+this.year; } } Main for testing : public class Main { public static void main(String[] args) { Date date1=new Date(30,4,2002); Ticket event1=new Ticket("Peter Gabriel's gig", "London",date1 ); Ticket event2=new Ticket("Diana Kroll's concert", "Glasgow",date1 ); Date date2=event2.giveDate(); date2.move(30); Ticket event3=new Ticket("X's B-day", "some place",date2 ); System.out.println(date1); System.out.println(event1); System.out.println(event2); System.out.println(event3); } } And here's my output. I just can't get it where 5,2,1 come from :/ x: 30 y: 4 z: 2002 this.day: 30 this.month: 4 this.year: 2002 when in giveDate() 6,12,2004 before_change: 6,12,2004 before_adding: 5,2,1 after_adding: 5,2,1 5,2,1 what: Peter Gabriel's gig where: London when: 5,2,1 (...)

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  • Android: Use XML Layout for List Cell rather than Java Code Layout (Widgets)

    - by Stephen Finucane
    Hi, I'm in the process of making a music app and I'm currently working on the library functionality. I'm having some problems, however, in working with a list view (In particular, the cells). I'm trying to move from a simple textview layout in each cell that's created within java to one that uses an XML file for layout (Hence keeping the Java file mostly semantic) This is my original code for the cell layout: public View getView(int position, View convertView, ViewGroup parent) { String id = null; TextView tv = new TextView(mContext.getApplicationContext()); if (convertView == null) { music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); musiccursor.moveToPosition(position); id = musiccursor.getString(music_column_index); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME); musiccursor.moveToPosition(position); id += "\n" + musiccursor.getString(music_column_index); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM); musiccursor.moveToPosition(position); id += "\n" + musiccursor.getString(music_column_index); tv.setText(id); } else tv = (TextView) convertView; return tv; } And my new version: public View getView(int position, View convertView, ViewGroup parent) { View cellLayout = findViewById(R.id.albums_list_cell); ImageView album_art = (ImageView) findViewById(R.id.album_cover); TextView album_title = (TextView) findViewById(R.id.album_title); TextView artist_title = (TextView) findViewById(R.id.artist_title); if (convertView == null) { music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM); musiccursor.moveToPosition(position); album_title.setText(musiccursor.getString(music_column_index)); //music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DISPLAY_NAME); //musiccursor.moveToPosition(position); music_column_index = musiccursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE); musiccursor.moveToPosition(position); artist_title.setText(musiccursor.getString(music_column_index)); } else{ cellLayout = (TextView) convertView; } return cellLayout; } The initialisation (done in the on create file): musiclist = (ListView) findViewById(R.id.PhoneMusicList); musiclist.setAdapter(new MusicAdapter(this)); musiclist.setOnItemClickListener(musicgridlistener); And the respective XML files: (main) <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <ListView android:id="@+id/PhoneMusicList" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <TextView android:id="@android:id/empty" android:layout_width="wrap_content" android:layout_height="0dip" android:layout_weight="1.0" android:text="@string/no_list_data" /> </LinearLayout> (albums_list_cell) <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/albums_list_cell" android:layout_width="wrap_content" android:layout_height="wrap_content"> <ImageView android:id="@+id/album_cover" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_width="50dip" android:layout_height="50dip" /> <TextView android:id="@+id/album_title" android:layout_toRightOf="@+id/album_cover" android:layout_alignParentTop="true" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:id="@+id/artist_title" android:layout_toRightOf="@+id/album_cover" android:layout_below="@+id/album_title" android:layout_width="wrap_content" android:layout_height="15dip" /> </RelativeLayout> In theory (based on the tiny bit of Android I've done so far) this should work..it doesn't though. Logcat gives me a null pointer exception at line 96 of the faulty code, which is the album_title.setText line. It could be a problem with my casting but Google tells me this is ok :D Thanks for any help and let me know if you need more info!

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  • Java Synchronized List Deadlock

    - by portoalet
    From Effective Java 2nd edition item 67 page 266-268: The background thread calls s.removeObserver, which attempts to lock observers, but it can’t acquire the lock, because the main thread already has the lock. All the while, the main thread is waiting for the background thread to finish removing the observer, which explains the deadlock. I am trying to find out which threads deadlock in the main method by using ThreadMXBean (http://stackoverflow.com/questions/1102359/programmatic-deadlock-detection-in-java) , but why does it not return the deadlocked threads? I used a new Thread to run the ThreadMXBean detection. public class ObservableSet<E> extends ForwardingSet<E> { public ObservableSet(Set<E> set) { super(set); } private final List<SetObserver<E>> observers = new ArrayList<SetObserver<E>>(); public void addObserver(SetObserver<E> observer) { synchronized(observers) { observers.add(observer); } } public boolean removeObserver(SetObserver<E> observer) { synchronized(observers) { return observers.remove(observer); } } private void notifyElementAdded(E element) { synchronized(observers) { for (SetObserver<E> observer : observers) observer.added(this, element); } } @Override public boolean add(E element) { boolean added = super.add(element); if (added) notifyElementAdded(element); return added; } @Override public boolean addAll(Collection<? extends E> c) { boolean result = false; for (E element : c) result|=add(element); //callsnotifyElementAdded return result; } public static void main(String[] args) { ObservableSet<Integer> set = new ObservableSet<Integer>(new HashSet<Integer>()); final ThreadMXBean threadMxBean = ManagementFactory.getThreadMXBean(); Thread t = new Thread(new Runnable() { @Override public void run() { while( true ) { long [] threadIds = threadMxBean.findDeadlockedThreads(); if( threadIds != null) { ThreadInfo[] infos = threadMxBean.getThreadInfo(threadIds); for( ThreadInfo threadInfo : infos) { StackTraceElement[] stacks = threadInfo.getStackTrace(); for( StackTraceElement stack : stacks ) { System.out.println(stack.toString()); } } } try { System.out.println("Sleeping.."); TimeUnit.MILLISECONDS.sleep(1000); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }); t.start(); set.addObserver(new SetObserver<Integer>() { public void added(ObservableSet<Integer> s, Integer e) { ExecutorService executor = Executors.newSingleThreadExecutor(); final SetObserver<Integer> observer = this; try { executor.submit(new Runnable() { public void run() { s.removeObserver(observer); } }).get(); } catch (ExecutionException ex) { throw new AssertionError(ex.getCause()); } catch (InterruptedException ex) { throw new AssertionError(ex.getCause()); } finally { executor.shutdown(); } } }); for (int i = 0; i < 100; i++) set.add(i); } } public interface SetObserver<E> { // Invoked when an element is added to the observable set void added(ObservableSet<E> set, E element); } // ForwardingSet<E> simply wraps another Set and forwards all operations to it.

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  • java - BigDecimal

    - by Mk12
    I was trying to make my own class for currencies using longs, but Apparently I should use BigDecimal (and then whenever I print it just add the $ sign before it). Could someone please get me started? What would be the best way to use BigDecimals for Dollar currencies, like making it at least but no more than 2 decimal places for the cents, etc. The api for BigDecimal is huge, and I don't know which methods to use. Also, BigDecimal has better precision, but isn't that all lost if it passes through a double? if I do new BigDecimal(24.99), how will it be different than using a double? Or should I use the constructor that uses a String instead? EDIT: I decided to use BigDecimals, and then use: private static final java.text.NumberFormat moneyt = java.text.NumberFormat.getCurrencyInstance(); { money.setRoundingMode(RoundingMode.HALF_EVEN); } and then whenever I display the BigDecimals, to use money.format(theBigDecimal). Is this alright? Should I have the BigDecimal rounding it too? Because then it doesn't get rounded before it does another operation.. if so, could you show me how? And how should I create the BigDecimals? new BigDecimal("24.99") ? Well, after many comments to Vineet Reynolds (thanks for keeping coming back and answering), this is what I have decided. I use BigDecimals and a NumberFormat. Here is where I create the NumberFormat instance. private static final NumberFormat money; static { money = NumberFormat.getCurrencyInstance(Locale.CANADA); money.setRoundingMode(RoundingMode.HALF_EVEN); } Here is my BigDecimal: private final BigDecimal price; Whenever I want to display the price, or another BigDecimal that I got through calculations of price, I use: money.format(price) to get the String. Whenever I want to store the price, or a calculation from price, in a database or in a field or anywhere, I use (for a field): myCalculatedResult = price.add(new BigDecimal("34.58")).setScale(2, RoundingMode.HALF_EVEN); .. but I'm thinking now maybe I should not have the NumberFormat round, but when I want to display do this: System.out.print(money.format(price.setScale(2, RoundingMode.HALF_EVEN); That way to ensure the model and things displayed in the view are the same. I don't do: price = price.setScale(2, RoundingMode.HALF_EVEN); Because then it would always round to 2 decimal places and wouldn't be as precise in calculations. So its all solved now, I guess. But is there any shortcut to typing calculatedResult.setScale(2, RoundingMode.HALF_EVEN) all the time? All I can think of is static importing HALF_EVEN... EDIT: I've changed my mind a bit, I think if I store a value, I won't round it unless I have no more operations to do with it, e.g. if it was the final total that will be charged to someone. I will only round things at the end, or whenever necessary, and I will still use NumberFormat for the currency formatting, but since I always want rounding for display, I made a static method for display: public static String moneyFormat(BigDecimal price) { return money.format(price.setScale(2, RoundingMode.HALF_EVEN)); } So values stored in variables won't be rounded, and I'll use that method to display prices.

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  • Oracle Social Network Developer Challenge: Fishbowl Solutions

    - by Kellsey Ruppel
    Originally posted by Jake Kuramoto on The Apps Lab blog. Today, I give you the final entry in the Oracle Social Network Developer Challenge, held last week during OpenWorld. This one comes from Friend of the ‘Lab and Fishbowl Solutions (@fishbowle20) hacker, John Sim (@jrsim_uix), whom you might remember from his XBox Kinect demo at COLLABORATE 12 (presentation slides and abstract) hacks and other exploits with WebCenter. We put this challenge together specifically for developers like John, who like to experiment with new tools and push the envelope of what’s possible and build cool things, and as you can see from his entry John did just that, mashing together Google Maps and Oracle Social Network into a mobile app built with PhoneGap that uses the device’s camera and GPS to keep teams on the move in touch. He calls it a Mobile GeoTagging Solution, but I think Avengers Assemble! would have equally descriptive, given that was obviously his inspiration. Here’s his description of the mobile app: My proposed solution was to design and simplify GeoLocation mapping, and automate updates for users and teams on the move; who don’t have access to a laptop or want to take their ipads out – but allow them to make quick updates to OSN and upload photos taken from their mobile device – there and then. As part of this; the plan was to include a rules engine that could be configured by the user to allow the device to automatically update and post messages when they arrived at a set location(s). Inspiration for this came from on{x} – automate your life. Unfortunately, John didn’t make it to the conference to show off his hard work in person, but luckily, he had a colleague from Fishbowl and a video to showcase his work.    Here are some shots of John’s mobile app for your viewing pleasure: John’s thinking is sound. Geolocation is usually relegated to consumer use cases, thanks to services like foursquare, but distributed teams working on projects out in the world definitely need a way to stay in contact. Consider a construction job. Different contractors all converge on a single location, and time is money. Rather than calling or texting each other and risking a distracted driving accident, an app like John’s allows everyone on the job to see exactly where the other contractors are. Using his GPS rules, they could easily be notified about how close each is to the site, definitely useful when you have a flooring contractor sitting idle, waiting for an electrician to finish the wiring. The best part is that the project manager or general contractor could stay updated on all the action (or inaction) using Oracle Social Network, either sitting at a desk using the browser app or desktop client or on the go, using one of the native mobile apps built for Oracle Social Network. I can see this being used by insurance adjusters too, and really any team that, erm, assembles at a given spot. Of course, it’s also useful for meeting at the pub after the day’s work is done. Beyond people, this solution could also be implemented for physical objects that are in route to a destination. Say you’re a customer waiting on rail shipment or a package delivery. You could track your valuable’s whereabouts easily as they report their progress via checkins. If they deviated from the GPS rules, you’d be notified. You might even be able to get a picture into Oracle Social Network with some light hacking. Thanks to John and his colleagues at Fishbowl for participating in our challenge. We hope everyone had a good experience. Make sure to check out John’s blog post on his work and the experience using Oracle Social Network. Although this is the final, official entry we had, tomorrow, I’ll show you the work of someone who finished code, but wasn’t able to make the judging event. Stay tuned.

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  • Trouble Percent-Encoding Spaces in Java

    - by behrk2
    Hi Everyone, I am using the URLUTF8Encoder.java class from W3C (www.w3.org/International/URLUTF8Encoder.java). Currently, it will encode any blank spaces ' ' into plus signs '+'. I am having difficulty modifying the code to percent-encode the blank space into '%20'. Unfortunately, I am not too familiar with hex. Can anyone help me out? I need to modify this snippet... else if (ch == ' ') { // space sbuf.append('+'); in the following code: final static String[] hex = { "%00", "%01", "%02", "%03", "%04", "%05", "%06", "%07", "%08", "%09", "%0A", "%0B", "%0C", "%0D", "%0E", "%0F", "%10", "%11", "%12", "%13", "%14", "%15", "%16", "%17", "%18", "%19", "%1A", "%1B", "%1C", "%1D", "%1E", "%1F", "%20", "%21", "%22", "%23", "%24", "%25", "%26", "%27", "%28", "%29", "%2A", "%2B", "%2C", "%2D", "%2E", "%2F", "%30", "%31", "%32", "%33", "%34", "%35", "%36", "%37", "%38", "%39", "%3A", "%3B", "%3C", "%3D", "%3E", "%3F", "%40", "%41", "%42", "%43", "%44", "%45", "%46", "%47", "%48", "%49", "%4A", "%4B", "%4C", "%4D", "%4E", "%4F", "%50", "%51", "%52", "%53", "%54", "%55", "%56", "%57", "%58", "%59", "%5A", "%5B", "%5C", "%5D", "%5E", "%5F", "%60", "%61", "%62", "%63", "%64", "%65", "%66", "%67", "%68", "%69", "%6A", "%6B", "%6C", "%6D", "%6E", "%6F", "%70", "%71", "%72", "%73", "%74", "%75", "%76", "%77", "%78", "%79", "%7A", "%7B", "%7C", "%7D", "%7E", "%7F", "%80", "%81", "%82", "%83", "%84", "%85", "%86", "%87", "%88", "%89", "%8A", "%8B", "%8C", "%8D", "%8E", "%8F", "%90", "%91", "%92", "%93", "%94", "%95", "%96", "%97", "%98", "%99", "%9A", "%9B", "%9C", "%9D", "%9E", "%9F", "%A0", "%A1", "%A2", "%A3", "%A4", "%A5", "%A6", "%A7", "%A8", "%A9", "%AA", "%AB", "%AC", "%AD", "%AE", "%AF", "%B0", "%B1", "%B2", "%B3", "%B4", "%B5", "%B6", "%B7", "%B8", "%B9", "%BA", "%BB", "%BC", "%BD", "%BE", "%BF", "%C0", "%C1", "%C2", "%C3", "%C4", "%C5", "%C6", "%C7", "%C8", "%C9", "%CA", "%CB", "%CC", "%CD", "%CE", "%CF", "%D0", "%D1", "%D2", "%D3", "%D4", "%D5", "%D6", "%D7", "%D8", "%D9", "%DA", "%DB", "%DC", "%DD", "%DE", "%DF", "%E0", "%E1", "%E2", "%E3", "%E4", "%E5", "%E6", "%E7", "%E8", "%E9", "%EA", "%EB", "%EC", "%ED", "%EE", "%EF", "%F0", "%F1", "%F2", "%F3", "%F4", "%F5", "%F6", "%F7", "%F8", "%F9", "%FA", "%FB", "%FC", "%FD", "%FE", "%FF" }; public static String encode(String s) { StringBuffer sbuf = new StringBuffer(); int len = s.length(); for (int i = 0; i < len; i++) { int ch = s.charAt(i); if ('A' <= ch && ch <= 'Z') { // 'A'..'Z' sbuf.append((char) ch); } else if ('a' <= ch && ch <= 'z') { // 'a'..'z' sbuf.append((char) ch); } else if ('0' <= ch && ch <= '9') { // '0'..'9' sbuf.append((char) ch); } else if (ch == ' ') { // space sbuf.append('+'); } else if (ch == '-' || ch == '_' // unreserved || ch == '.' || ch == '!' || ch == '~' || ch == '*' || ch == '\'' || ch == '(' || ch == ')') { sbuf.append((char) ch); } else if (ch <= 0x007f) { // other ASCII sbuf.append(hex[ch]); } else if (ch <= 0x07FF) { // non-ASCII <= 0x7FF sbuf.append(hex[0xc0 | (ch >> 6)]); sbuf.append(hex[0x80 | (ch & 0x3F)]); } else { // 0x7FF < ch <= 0xFFFF sbuf.append(hex[0xe0 | (ch >> 12)]); sbuf.append(hex[0x80 | ((ch >> 6) & 0x3F)]); sbuf.append(hex[0x80 | (ch & 0x3F)]); } } return sbuf.toString(); } Thanks!

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  • Making the most of next weeks SharePoint 2010 developer training

    - by Eric Nelson
    [you can still register if you are free on the afternoons of 9th to 11th – UK time] We have 50+ registrations with more coming in – which is fantastic. Please read on to make the most of the training. Background We have structured the training to make sure that you can still learn lots during the three days even if you do not have SharePoint 2010 installed. Additionally the course is based around a subset of the channel 9 training to allow you to easily dig deeper or look again at specific areas. Which means if you have zero time between now and next Wednesday then you are still good to go. But if you can do some pre-work you will likely get even more out of the three days. Step 1: Check out the topics and resources available on-demand The course is based around a subset of the channel 9 training to allow you to easily dig deeper or look again at specific areas. Take a lap around the SharePoint 2010 Training Course on Channel 9 Download the SharePoint Developer Training Kit Step 2: Use a pre-configured Virtual Machine which you can download (best start today – it is large!) Consider using the VM we created If you don't have access to SharePoint 2010. You will need a 64bit host OS and bare minimum of 4GB of RAM. 8GB recommended. Virtual PC can not be used with this VM – Virtual PC only supports 32bit guests. The 2010-7a Information Worker VM gives you everything you need to develop for SharePoint 2010. Watch the Video on how to use this VM Download the VM Remember you only need to download the “parts” for the 2010-7a VM. There are 3 subtly different ways of using this VM: Easiest is to follow the advice of the video and get yourself a host OS of Windows Server 2008 R2 with Hyper-V and simply use the VM Alternatively you can take the VHD and create a “Boot to VHD” if you have Windows 7 Ultimate or Enterprise Edition. This works really well – especially if you are already familiar with “Boot to VHD” (This post I did will help you get started) Or you can take the VHD and use an alternative VM tool such as VirtualBox if you have a different host OS. NB: This tends to involve some work to get everything running fine. Check out parts 1 to 3 from Rolly and if you go with Virtual Box use an IDE controller not SATA. SATA will blue screen. Note in the screenshot below I also converted the vhd to a vmdk. I used the FREE Starwind Converter to do this whilst I was fighting blue screens – not sure its necessary as VirtualBox does now work with VHDs. or Step 3 – Install SharePoint 2010 on a 64bit Windows 7 or Vista Host I haven’t tried this but it is now supported. Check out MSDN. Final notes: I am in the process of securing a number of hosted VMs for ISVs directly managed by my team. Your Architect Evangelist will have details once I have them! Else we can sort out on the Wed. Regrettably I am unable to give folks 1:1 support on any issues around Boot to VHD, 3rd party VM products etc. Related Links: Check you are fully plugged into the work of my team – have you done these simple steps including joining our new LinkedIn group?

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  • Beginner questions on Java Regular Expression

    - by Robert
    Hello everyone. I began studying Java Regular Expression recently and I found some really intersting task.For example,I now need to dig out "Product Name","Product Description" and "Sellers for this product" out of the following HTML code.(I am sorry for the big chunck of code,but it is very straightforward) <td class="sr-check"> <input type="checkbox" name="cptitle" value="678560038" /></td> <td class="sr-image" style="width: 80px;"><a href="/Nikon-D300S-12-3-678560038/prices-html" class="strictRule" rel="nofollow"><img src="http://img01.static-nextag.com/image/Nikon-D300S-12-3-MP-Digital-SLR-Camera-Body-Black/0/000/006/789/461/678946110.jpg" alt="Nikon D300S 12.3 MP Digital SLR Camera Body - Black" class="imageLink strictRule" height="75" width="75" id="opILink_0" title="Nikon Digital Cameras - Nikon D300S 12.3 MP Digital SLR Camera Body - Black" /></a><div class="breaker">&nbsp;</div></td> <td class="sr-info"> <div class="sr-info"> <a id="opPNLink_0" class="underline" style="font-size:16px" href="/Nikon-D300S-12-3-678560038 /prices-html" >Nikon D300S 12.3 MP <b>Digital</b> SLR <b>Camera</b> Body - Black</a> <div class="sr-subinfo"> <div class="sr-info-description">SLR - 13.1MP, 12.3MP - 1x Optical Zoom - CompactFlash, SD/MMC Memory Card - 3in.</div> <div class="rating"> <img src="http://img01.static-nextag.com/imagefiles/stars/stars4_10px.gif" alt="4/5 stars" title="4/5 stars" /> (92 user ratings)</div> <div style="clear: both;"> <!-- nxtginc=nextag.api.ServerInclude$JSPIncludeWriter(/buyer/ATLSSI.jsp?ptid=678560038&dts=y) --> <a id="_atl_0" style="" href="http://www.nextag.com/serv/main/buyer/MyPDir.jsp?list=_transCookieList&amp;cmd=add&amp;ptitle=678560038" rel="nofollow">+ Add to Shopping List</a> &nbsp;|&nbsp; <!-- endnxtginc --> <a rel="nofollow" id="mltLink_0" class="mlt-link" href="/Digital-Cameras--zz500001z2z678560038zB2dgz5---html">See More Like This</a> </div> <div id="fsLink_0" class="featuredSeller"> <a rel="nofollow" class="featuredSeller" id="opFSLink_0_0" href="/norob/PtitleSeller.jsp?chnl=main&amp;tag=785646073amp;ctx=x%2BN%2Fs9zy56l4u8RXCzALE1jeLesDMzeK09rPQEdK3Yjx395ZzX9cMh9N5JAxjk7xPqF9hjk2ztM5IRXU5nspLubIXYaVzI%2B%2Fg7h1Qz58TzgvrWuNawV8qEIqqSmClArWMq6mpzNRuSlgg2xCXYObNnaIH00iKSUmBawDRvecwbCpAxhXgXoLEiEinTwr3EipComdzxL9UHFYTLoWUToUB5SRSsolQmEJ3mgnnvu83%2FC8W34TGpN9mJo%2BnyAeTkt4&amp;ptitle=678560038" target="_blank" >Thundercameras</a>:$1,289 &nbsp; <a rel="nofollow" class="featuredSeller" id="opFSLink_0_1" href="/norob/PtitleSeller.jsp?chnl=main&amp;tag=797076595&amp;ctx=x%2BN%2Fs9zy56l4u8RXCzALE1jeLesDMzeK09rPQEdK3Yjx395ZzX9cMh9N5JAxjk7xPqF9hjk2ztM5IRXU5nspLubIXYaVzI%2B%2Fg7h1Qz58TzgvrWuNawV8qEIqqSmClArWMq6mpzNRuSlgg2xCXYObNrcWLhL%2BhryuAGhXNhYSPE%2BpAxhXgXoLEiEinTwr3EipComdzxL9UHFYTLoWUToUB5SRSsolQmEJ3mgnnvu83%2FC8W34TGpN9mJo%2BnyAeTkt4&amp;ptitle=678560038" target="_blank" >PhotoVideoSuperStore</a>:$1,269 &nbsp; <a rel="nofollow" class="featuredSeller" id="opFSLink_0_2" href="/norob/PtitleSeller.jsp?chnl=main&amp;tag=803555293&amp;ctx=x%2BN%2Fs9zy56l4u8RXCzALE1jeLesDMzeK09rPQEdK3Yjx395ZzX9cMh9N5JAxjk7xPqF9hjk2ztM5IRXU5nspLubIXYaVzI%2B%2Fg7h1Qz58TzgvrWuNawV8qEIqqSmClArWMq6mpzNRuSlgg2xCXYObNt06qcvLJ5UQz7S3zKd4urWpAxhXgXoLEiEinTwr3EipComdzxL9UHFYTLoWUToUB5SRSsolQmEJ3mgnnvu83%2FC8W34TGpN9mJo%2BnyAeTkt4&amp;ptitle=678560038" target="_blank" >Digitalelect</a>:$1,279 &nbsp;</div> I would think of : (1) digging out the product name from <td class="sr-image >tag,and using regular expression exp ="<td><span\\s+class=\"sr-image\"[^>]*>" + ".*?</span><a href=\"" + "([^\"]+)" + "\"[^>]*>" + "([^<]+)" + "</a>.*?</td>"; (2) digging out the product info from the <div class="sr-info-description"> tag. exp = "<div class="sr-info-description"> [^>]*>" (3) digging out the Sellers' names from <div id="fsLink_0" class="featuredSeller"> tag. exp = "<div id="fslink_0" class="featuredSeller[^>]*>" + ".*?</span><a rel=\"" + "([^\"]+)" + "\"[^>]*>" + "([^<]+)" + "</a>.*?</td>"; I am just beginning learing using Java Regular Expression,I would be grateful if you could correct me if I am in the wrong track or my regular expressiona are wrong. Thanks a lot,guys.

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  • Java List to Excel Columns

    - by Nitin
    Correct me where I'm going wrong. I'm have written a program in Java which will get list of files from two different directories and make two (Java list) with the file names. I want to transfer the both the list (downloaded files list and Uploaded files list) to an excel. What the result i'm getting is those list are transferred row wise. I want them in column wise. Given below is the code: public class F { static List<String> downloadList = new ArrayList<>(); static List<String> dispatchList = new ArrayList<>(); public static class FileVisitor extends SimpleFileVisitor<Path> { @Override public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException { String name = file.toRealPath().getFileName().toString(); if (name.endsWith(".pdf") || name.endsWith(".zip")) { downloadList.add(name); } if (name.endsWith(".xml")) { dispatchList.add(name); } return FileVisitResult.CONTINUE; } } public static void main(String[] args) throws IOException { try { Path downloadPath = Paths.get("E:\\report\\02_Download\\10252013"); Path dispatchPath = Paths.get("E:\\report\\01_Dispatch\\10252013"); FileVisitor visitor = new FileVisitor(); Files.walkFileTree(downloadPath, visitor); Files.walkFileTree(downloadPath, EnumSet.of(FileVisitOption.FOLLOW_LINKS), 1, visitor); Files.walkFileTree(dispatchPath, visitor); Files.walkFileTree(dispatchPath, EnumSet.of(FileVisitOption.FOLLOW_LINKS), 1, visitor); System.out.println("Download File List" + downloadList); System.out.println("Dispatch File List" + dispatchList); F f = new F(); f.UpDown(downloadList, dispatchList); } catch (Exception ex) { Logger.getLogger(F.class.getName()).log(Level.SEVERE, null, ex); } } int rownum = 0; int colnum = 0; HSSFSheet firstSheet; Collection<File> files; HSSFWorkbook workbook; File exactFile; { workbook = new HSSFWorkbook(); firstSheet = workbook.createSheet("10252013"); Row headerRow = firstSheet.createRow(rownum); headerRow.setHeightInPoints(40); } public void UpDown(List<String> download, List<String> upload) throws Exception { List<String> headerRow = new ArrayList<>(); headerRow.add("Downloaded"); headerRow.add("Uploaded"); List<List> recordToAdd = new ArrayList<>(); recordToAdd.add(headerRow); recordToAdd.add(download); recordToAdd.add(upload); F f = new F(); f.CreateExcelFile(recordToAdd); f.createExcelFile(); } void createExcelFile() { FileOutputStream fos = null; try { fos = new FileOutputStream(new File("E:\\report\\Download&Upload.xls")); HSSFCellStyle hsfstyle = workbook.createCellStyle(); hsfstyle.setBorderBottom((short) 1); hsfstyle.setFillBackgroundColor((short) 245); workbook.write(fos); } catch (Exception e) { } } public void CreateExcelFile(List<List> l1) throws Exception { try { for (int j = 0; j < l1.size(); j++) { Row row = firstSheet.createRow(rownum); List<String> l2 = l1.get(j); for (int k = 0; k < l2.size(); k++) { Cell cell = row.createCell(k); cell.setCellValue(l2.get(k)); } rownum++; } } catch (Exception e) { } finally { } } } (The purpose is to verify the files Downloaded and Uploaded for the given date) Thanks.

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  • Type of computer for a developer on the road

    - by nabucosound
    Hi developers: I am planning to be traveling through eurasia and asia (russia, china, korea, japan, south east asia...) for a while and, although there are plenty of marvelous things to see and to do, I must keep on working :(. I am a python developer, dedicated mainly to web projects. I use django, sqlite3, browsers, and ocassionaly (only if I have no choice) I install postgres, mysql, apache or any other servers commonly used in the internets. I do my coding on vim, use ssh to connect, lftp to transfer files, IRC, grep/ack... So I spend most of my time in the terminal shells. But I also use IM or Skype to communicate with my clients and peers, as well as some other software (that after all is not mandatory for my day-to-day work). I currently work with a Macbook Pro (3 years old now) and so far I am very happy with the performance. But I don't want to carry it if I am going to be "on transit" for long time, it is simply huge and heavy for what I am planning to load in my rather small backpack (while traveling, less is more, you know). So here I am reading all kind of opinions about netbooks, because at first sight this is the kind of computer I thought I had to choose. I am going to use Linux for it, Microsoft is not my cup of tea and Mac is not available for them, unless I were to buy a Macbook air, something that I won't do because if I am robbed or rain/dust/truck loaders break it I would burst in tears. I am concerned about wifi performance and connectivity, I am going to use one of those linux distros/tools to hack/test on "open" networks (if you know what I mean) in case I am not in a place with real free wifi access and I find myself in an emergency. CPU speed should be acceptable, but since I don't plan to run Photoshop or expensive IDEs, I guess most of the time I won't be overloading the machine. Apart from this, maybe (surely) I am missing other features to consider. With that said (sorry about the length) here it comes my question, raised from a deep ignorance regarding the wars betweeb betbooks vs notebooks (I assume tablet PCs are not for programming yet): If I buy a netbook will I have to throw it away after 1 month on the road and buy a notebook? Or will I be OK? Thanks! Hector Update I have received great feedback so far! I would like to insist on the fact that I will be traveling through many different countries and scenarios. I am sure that while in Japan I will be more than fine with anything related to technology, connectivity, etc. But consider that I will be, for example, on a train through Russia (transsiberian) and will cross Mongolia as well. I will stay in friends' places sometimes, but most of the time I will have to work from hostel rooms, trains, buses, beaches (hey this last one doesn't sound too bad hehe!). I think some of your answers guys seem to focus on the geek part but loose the point of this "on the road" fact. I am very aware and agree that netbooks suck compared to notebooks, but what I am trying to do here is to find a balance and discover your experiences with netbooks to see first hand if a netbook will be a fail in the mid-long term of the trip for my purposes. So I have resumed the main concepts expressed here on this small list, in no particular order: keyboard/touchpad feel: I use vim so no need of moving mouse pointers that much, unless I am browsing the web, but intensive use of keyboard screen real state: again, terminal work for most of the time battery life: I think something very important weight/size: also very important looks not worth stealing it, don't give a shit if it is lost/stolen/broken: this may depend on kind of person, your economy, etc. Also to prevent losing work, I will upload EVERYTHING to the cloud whenever I'll have a chance. wifi: don't want to discover my wifi is one of those that cannot deal with half the routers on this planet or has poor connectivity. Thanks again for your answers and comments!

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  • Parallel processing via multithreading in Java

    - by Robz
    There are certain algorithms whose running time can decrease significantly when one divides up a task and gets each part done in parallel. One of these algorithms is merge sort, where a list is divided into infinitesimally smaller parts and then recombined in a sorted order. I decided to do an experiment to test whether or not I could I increase the speed of this sort by using multiple threads. I am running the following functions in Java on a Quad-Core Dell with Windows Vista. One function (the control case) is simply recursive: // x is an array of N elements in random order public int[] mergeSort(int[] x) { if (x.length == 1) return x; // Dividing the array in half int[] a = new int[x.length/2]; int[] b = new int[x.length/2+((x.length%2 == 1)?1:0)]; for(int i = 0; i < x.length/2; i++) a[i] = x[i]; for(int i = 0; i < x.length/2+((x.length%2 == 1)?1:0); i++) b[i] = x[i+x.length/2]; // Sending them off to continue being divided mergeSort(a); mergeSort(b); // Recombining the two arrays int ia = 0, ib = 0, i = 0; while(ia != a.length || ib != b.length) { if (ia == a.length) { x[i] = b[ib]; ib++; } else if (ib == b.length) { x[i] = a[ia]; ia++; } else if (a[ia] < b[ib]) { x[i] = a[ia]; ia++; } else { x[i] = b[ib]; ib++; } i++; } return x; } The other is in the 'run' function of a class that extends thread, and recursively creates two new threads each time it is called: public class Merger extends Thread { int[] x; boolean finished; public Merger(int[] x) { this.x = x; } public void run() { if (x.length == 1) { finished = true; return; } // Divide the array in half int[] a = new int[x.length/2]; int[] b = new int[x.length/2+((x.length%2 == 1)?1:0)]; for(int i = 0; i < x.length/2; i++) a[i] = x[i]; for(int i = 0; i < x.length/2+((x.length%2 == 1)?1:0); i++) b[i] = x[i+x.length/2]; // Begin two threads to continue to divide the array Merger ma = new Merger(a); ma.run(); Merger mb = new Merger(b); mb.run(); // Wait for the two other threads to finish while(!ma.finished || !mb.finished) ; // Recombine the two arrays int ia = 0, ib = 0, i = 0; while(ia != a.length || ib != b.length) { if (ia == a.length) { x[i] = b[ib]; ib++; } else if (ib == b.length) { x[i] = a[ia]; ia++; } else if (a[ia] < b[ib]) { x[i] = a[ia]; ia++; } else { x[i] = b[ib]; ib++; } i++; } finished = true; } } It turns out that function that does not use multithreading actually runs faster. Why? Does the operating system and the java virtual machine not "communicate" effectively enough to place the different threads on different cores? Or am I missing something obvious?

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