java design patterns - Page 712

Is there equivalences between Microsoft and Oracle/Sun technologies?

- by Junior Mayhé

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Comparator that can compare LinkedHashMaps

- by Gauranga

I am new to Comparators in Java `Can someone help me to create a Comparator to compare LinkedHashmaps by comparing keys/values`

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how to pass parameters to a URL and get the generated image

- by Nubkadiya

i want o pass several parameters to this url and generate the map from it and show it in my java application. i know the code to download the image and show it in the java application. i want to know how to pass parameters to this address "http://maps.google.com/maps/api/staticmap?center=Nugegoda&zoom=14&size=1000x312&maptype=roadmap&markers=color:blue|label:S|size=tiny|Mirihana\&markers=size:mid|color:0xFFFF00|label:C|Udahamulla&sensor=false " in this link Nugegoda and Mirihana and Udahamulla is the one that i should pass from the application. and then it will generate a image and i do need to show it. even if u check this link. its a image. can someone help me

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Major differences in CSS design for IE6 & Other browsers

- by shoaibmohammed

Hello This might sound to be a big question, but could you specify what are the issues to be considered which designing CSS for IE6 & Other browsers. To be in more simple terms, what is so different in CSS for IE6 when compared with other standard browsers. What are the Issues to be considered when making a IE6 compatible CSS

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Reflect and Load code at design time in Visual Studio

- by Stacey

I have an XML file that lists a series of items, and the items are often referenced by their name in code. Is there any way to use reflection within Visual Studio to make this list 'accessible' sort of like intellisence? I've seen it done before - and I'm pretty sure it's ridiculously difficult, but I figure it can't hurt to at least ask.

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WebService: Firefox can't establish a connection to the server at 192.168.10.203:8080

- by hp1

Hi, I am trying to create a WebService. I am not able to access the URL. If I try to connect to http://192.168.10.203:8080/EchoBeanService/EchoBean?wsdl I get an error: Firefox can't establish a connection to the server at 192.168.10.203:8080 However, if I am able to connect to the using localhost in the URL: http://localhost:8080/EchoBeanService/EchoBean?wsdl Echo.java package services; public interface Echo { public String printEcho(); public String printEchoParam(String str); } EchoBean.java package model; import javax.jws.WebService; import javax.ejb.Stateless; import javax.jws.WebMethod; import services.Echo; @Stateless @WebService public class EchoBean implements Echo { public EchoBean(){} @WebMethod public String printEcho(){ return "WebServices Echo "; } @WebMethod public String printEchoParam(String str){ return ("In PrintEcho( String " + str +" )" ); } } -H

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can i create a google account programmatically ?

- by vfix

Does anybody know if via the google api in java I can create google accounts programmatically.

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Pre-Compiled Header Design Question

- by ML

Hi All, I have code that uses a pre-compiled header. (previously done by someone else) In it, they are including several .h files. If I have classes that use common .h files that are not currently in the existing pre-compiled header, would tossing them in there be of any real benefit? Maybe compilation speed, but I was thinking it would clean up the classes/headers a bit too? What are do's and don't with pre-compiled headers?

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Program seems to get stuck ?

- by Frank

I have a Java program, I did some change and the strange thing is no matter what I do now, it will output the same result before my change, I looked into my system (Windows Vista), and clicked on "Generate a system health report", the result says : Symptom : A service is reported as having an unexpected error code Cause : One or more services has failed. The service did not stop gracefully, suggesting the service may have crashed or one of its components stopped in an unsupported way. Details : Service exited with code not equal to 0 or 1077 Resolution : Restart the service It doesn't say which service, and I defragmented my drives a few times, it still gave me the same report. I also checked my memory, it says no problem with ram. Everything else is ok, I re-started the windows a few times, got more free space on my C: drive, yet the Java program is still not responding to my new changes, unless I intentionally make a mistake, it gives me compile error, but if it can compile successfully, it still gives me the results before the change. What can I do to fix this ? Frank

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Signature of Collections.min/max method

- by Marco

In Java, the Collections class contains the following method: public static <T extends Object & Comparable<? super T>> T min(Collection<? extends T> c) Its signature is well-known for its advanced use of generics, so much that it is mentioned in the Java in a Nutshell book and in the official Sun Generics Tutorial. However, I could not find a convincing answer to the following question: Why is the formal parameter of type Collection<? extends T>, rather than Collection<T>? What's the added benefit?

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Mock Object and Interface

- by tunl

I'm a newbie in Unit Test with Mock Object. I use EasyMock. I try to understand this example: import java.io.IOException; public interface ExchangeRate { double getRate(String inputCurrency, String outputCurrency) throws IOException; } import java.io.IOException; public class Currency { private String units; private long amount; private int cents; public Currency(double amount, String code) { this.units = code; setAmount(amount); } private void setAmount(double amount) { this.amount = new Double(amount).longValue(); this.cents = (int) ((amount * 100.0) % 100); } public Currency toEuros(ExchangeRate converter) { if ("EUR".equals(units)) return this; else { double input = amount + cents/100.0; double rate; try { rate = converter.getRate(units, "EUR"); double output = input * rate; return new Currency(output, "EUR"); } catch (IOException ex) { return null; } } } public boolean equals(Object o) { if (o instanceof Currency) { Currency other = (Currency) o; return this.units.equals(other.units) && this.amount == other.amount && this.cents == other.cents; } return false; } public String toString() { return amount + "." + Math.abs(cents) + " " + units; } } import junit.framework.TestCase; import org.easymock.EasyMock; import java.io.IOException; public class CurrencyTest extends TestCase { public void testToEuros() throws IOException { Currency testObject = new Currency(2.50, "USD"); Currency expected = new Currency(3.75, "EUR"); ExchangeRate mock = EasyMock.createMock(ExchangeRate.class); EasyMock.expect(mock.getRate("USD", "EUR")).andReturn(1.5); EasyMock.replay(mock); Currency actual = testObject.toEuros(mock); assertEquals(expected, actual); } } So, i wonder how to Currency use ExchangeRate in toEuros(..) method. rate = converter.getRate(units, "EUR"); The behavior of getRate(..) method is not specified because ExchangeRate is an interface.

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Modular GWT design concerns

- by GlGuru

Hi, I have a couple of questions regarding a modular GWT based application framework. I have some ideas about them but being new to the field of web development I feel they are far from ideal. I'd appreciate a few comments and suggestions in this regard. Here are my questions: I am developing a framework which will allow third parties to embed GWT applications into our website and do some communication with them using simple iFrame postMessage. All these third party modules are going to use our SDK which is also GWT based. The problem arises that even though all the modules will be using the same codebase there is going to be a massive overheard in the amount of duplicate Javascript code (i.e. our common SDK code base which is quite large) being downloaded on the client's machine. This is highly redundant and problematic, not only due to the sheer size of duplicate code but, also due to the fact that subsequent updates of the SDK would require the modules to be recompiled which is going to create a DLL hell kind of scenario in the long run. What is the best way of doing this kind of thing? Is there a way where I can have some static GWT code (i.e. the SDK) and the dynamic GWT module refers to it (even if lies on a different domain) and it all work happily? The other part of the problem lies in providing robust scripting front end to the SDK. At first it appears to be trivial since Javascript itself is a scripting language. However, I do not know how to load and call a piece of pure Javascript code at runtime? I am willing to put restrictions on the target Javascript (i.e. having a function main and unique namespace or something). Furthermore the Javascript will come as a string from a database and not as a full URL. If its doable in Javascript how does one get this right in GWT i.e. forcing the compiler to emit a certain function in the generated Javascript? This I believe can be lesser of a problem by having a stub Javascript with all the right requirements which just loads up a GWT generated Javascript. Is any of this possible at all? I generally hate to be this verbose but I hope to find a quick solution to the problem as its holding up my progress. I'd highly appreciate any comments, suggestions and experiences.

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What the performance of Festival TTS vs FreeTTS on windows platforms?

- by Steel Plume

9 hours ago I had the wonderful idea to build up from scratch Festival TTS on Windows. In the meanwhile, and in less than 30 minutes, I build up the same source code on Linux, but only because tons of development tools were already installed :D Also this morning I downloaded FreeTTS. I started a simple testing project in less of 10 minutes, thanks to the Java power :D. Unfortunately FreeTTS does not provide immediate support for international mbrola languages, so this morning I thinked "it needs too much work"... Backing to Festival TTS on Windows, after many obstacles, and tons of wrong downloads, CYGWIN before, then "make" and other exotic C++ tools "forgotten" in the installation of CYGWIN, then Visual Studio 2008, then Windows Platform SDK 2008, but it lacks of System.h, so just now I am downloading Windows Server Platform SDK 2003, etc... So now, as I am yet here without having compiled a single line of damned C-- code, my question is: at least Festival TTS is a good choice on Windows for Java development?

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Web Search API which allows automated queries

- by Spi1988

I need to develop a java desktop application which sends queries to a search engine in order to obtain the very first highest ranked pages (Example: the first 4 pages only). Some heavy processing needs to be performed on the retrieved pages, so the time between a query and another won't be less then a minute. I would like to know whether there is any web search API for java, suitable for my situation, i.e. which allows the use of automated queries? (since in my case, the queries are generated programatically, and not through user interaction) I have checked Google's AJAX Search API and also Yahoo's Search Boss, however they only allow queries triggered by direct user interaction.

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How can I design a custom control in Javascript (possibly using jQuery)

- by Mathieu Pagé

I'd like to create a custom control in javascript. The goal is to create a building block that has methods, properties and events and render into a div. An example of one such control would be a calendar. It would render into a div, it would have properties that would define how it's displayed and what date is selected or highlighted, it would have methods to change the current month or to select some date and it would raise events when a day is clicked or the current month is changed by a user input. I can think of lots of way to implement this and I'm not sure what is the best way. I seem to remember that it's a bad thing to augment a DOM elements with properties and method, so I ruled that out. A jQuery plugin seems like a good idea, however I'm not sure if it's appropriate to create a plugin for each and every method my control would have so I could then use it like : $('#control').method1(); $('#control').method2(); And if I do use jQuery, where do I store the private data of my control? Another idea I got was to create a new kind of object that would have a reference to a div in which it could render it's elements. So what is the prefered way to do this. If I can I would like to do this as a jQuery plugin, but I'd need guidlines on how to create methods and where to store private data. I've loked at Plugins/Authoring on jQuery website and it did not helped that much in this regard.

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Using jep.invoke() method

- by hofsoc

Hi, I need to call a function from a python script and pass in parameters into it. I have a test python script which I can call and run from java using Jepp - this then adds the person. Eg Test.py import Finding from Finding import * f = Finding() f.addFinding("John", "Doe", 27) Within my Finding class I have addFinding(firstname, lastName, age) However, I wish to be able to do this from within java. Should I be using the jep.invoke() method. Does anyone have a hello world example of such a thing being done or forward me to some good examples? Does anyone have any suggestions please? Thanks in advance

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Displaying Current Pictures From A Camera

- by Kap

Hi Guys, I would like to develop an application that will receive pictures from a camera and maybe afterwards save it in a database. This is what i want to do: When the picture is taken it is send to the program immediately (or the program must read the current picture taken) then display it. I will take pictures of many people or things so anytime a picture is taken i want to see the current picture displayed in the program. I have googled if i can see an example application so that i know that it possible so that i can do mine from scratch. But couldn't find any so i am not sure if it is possible to do it in java. So guys am asking for guidelines how i can do it in java. I just need the steps then i will program everything myself. Thanks.

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How to Generate Edifact message from a xml ?

- by Clem

Hello, I'm currently dealing with customs messages Beans in Java. After filling in the Beans with different values, I want to produce an EDIFACT CUSDEC message corresponding to each message. For each attribute of a message Bean, I have the information to put the attribute in the right place in EDIFACT CUSEDC format. Thus, I am looking for a free tool (a Java API) which could ideally convert my full-filled Bean into an EDIFACT CUSDEC message. I found a commercial solution (not free) there : http://www.datadirect.com/products/edifact-grid/index.ssp And a quick tutorial here : http://biemond.blogspot.com/2008/09/generate-edifact-message-from-xml.html But ... unfortunately it is not free.. Thanks in advance for your help!

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How to manage Libraries/jar files in eclipse?

- by pvsnp

I might be missing something but how do you manage Java projects in eclipse that need a lot of Jar files. I know maven manages libraries well if there are new updates but maybe I'm missing something, is there a way that eclipse can update new jar files (it would be especially useful for projects using apache-commons, say). I don't want to sound like asking for a feature request, but I'm looking at if there are ways to keep libraries jar files that a Java project uses to keep them updated automatically the way maven does. With more languages coming with this type of features, finding the right Jar files probably should be easier than this.

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Please recommend good books for telemetry / SCADA system design & programming

- by Mawg

I am looking at several projects, all with roughly the same fucntionality. Some instruments collect some data (or control some functionality). They commmunicate by Internet (Etehrnet/wifi/GPRS/sasatellite) with a databse server which stores the measurements and provides a browser based means of qeurying the data, prodcuing reports, etc (and possibly also allows control of the remote equipment). Can anyone recommend a good book describing an approach to developing such a software architecture, keeping it generic, which tools, languages. test methods, etc to use? (note to self: ask a similar question about possible existing frameworks)

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Enable debugging in Design mode in VS

- by Dan Tao

Is there any way to enable debugging from within the Windows Forms Designer in Visual Studio (any version, up to and including 2010)? What I mean is, say I have some custom user control, and this control has certain validation that it performs when I set a particular property. I'd like to be able to set a breakpoint somewhere within that code, and step through it to see what happens when I set the property from the designer.

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Design: How to declare a specialized memory handler class

- by Michael Dorgan

On an embedded type system, I have created a Small Object Allocator that piggy backs on top of a standard memory allocation system. This allocator is a Boost::simple_segregated_storage< class and it does exactly what I need - O(1) alloc/dealloc time on small objects at the cost of a touch of internal fragmentation. My question is how best to declare it. Right now, it's scope static declared in our mem code module, which is probably fine, but it feels a bit exposed there and is also now linked to that module forever. Normally, I declare it as a monostate or a singleton, but this uses the dynamic memory allocator (where this is located.) Furthermore, our dynamic memory allocator is being initialized and used before static object initialization occurs on our system (as again, the memory manager is pretty much the most fundamental component of an engine.) To get around this catch 22, I added an extra 'if the small memory allocator exists' to see if the small object allocator exists yet. That if that now must be run on every small object allocation. In the scheme of things, this is nearly negligable, but it still bothers me. So the question is, is there a better way to declare this portion of the memory manager that helps decouple it from the memory module and perhaps not costing that extra isinitialized() if statement? If this method uses dynamic memory, please explain how to get around lack of initialization of the small object portion of the manager.

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I want to design a html form in python

- by VaIbHaV-JaIn

when user will enter details in the text box on the html from <h1>Please enter new password</h1> <form method="POST" enctype="application/json action="uid"> Password<input name="passwd"type="password" /><br> Retype Password<input name="repasswd" type="password" /><br> <input type="Submit" /> </form> </body> i want to post the data in json format through http post request and also i want to set content-type = application/json

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Which is tool u use for database design on linux?

- by piemesons

Which is tool u use for database design on linux

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Flex 4 app with mate design question

- by chchrist

Hi all, I have a view with a DropDownList component and a DataGroup component. The dropdownlist has to be updated from a remote php object and on change to call another remote object service in order to update the datagroup's provider. So I am thinks to dispatch an event from my view and the in my EventMap to call the service and inject the result to the drop down. When the dropdown changes I'll dispatch another event and in the EventMap I'll call another service and I'll inject the result to the datagroup. Is there another more sophisticated way? Thanks in advance

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