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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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  • Where can I learn about JNDI strings?

    - by ferrari fan
    How do you know how to form a JNDI string? I know there must be a format and that the divisions must mean something but I haven't been able to find a good resource that explains them. For example: java:comp/env/wm/default. This is supposed to connect to a WorkManager in Websphere with the name of default. But what does the "java", "comp", "env" mean? I know what the wm/default mean because that's the JNDI name put in the WorkManager, but what does the rest mean? Thanks

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  • Deleting a Collection with NHibernate Using the Criteria API

    - by lomaxx
    I think I know what the answer to this question is probably going to be, but I thought I'd go ahead and ask it anyway. It appears that within NHibernate if I do something like this: IList<Customer> customers = Session.CreateCriteria(typeof(Customer)) .Add(Restrictions.Eq("Name", "Steve") .List<Customer>(); And I want to then delete that list of customers. From what I can tell the only way to do it is like this: foreach(var customer in customers) { Session.Delete(customer); } But what I'm wondering is if there's any way I can just go: Session.Delete(customers); And delete the entire collection with a single call?

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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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  • Facebook JS API: users_getInfo() inside ifUserConnected() deadlock.

    - by serg555
    I am trying to put Facebook connect button on the site and once connected display connected username. But for some reason following code goes into some infinite loop during first connection, and then works fine unless I delete this app from my facebook profile which causes freezing again. Here is a code on FB connect button click: FB.Connect.requireSession(); Here is code directly on the page: <script src="http://static.ak.connect.facebook.com/js/api_lib/v0.4/FeatureLoader.js.php/en_US" type="text/javascript"></script> <script type="text/javascript"> FB.init("123", "/xd_receiver.htm"); FB.ensureInit(function() { FB.Connect.ifUserConnected(function() { FB.Facebook.apiClient.users_getInfo(new Array(FB.Connect.get_loggedInUser()),new Array("name"), function(user, exec) { console.log("logged in:"+user[0].name); }); }, function(){ console.log("guest"); }); }); </script> If I remove FB.Facebook.apiClient.users_getInfo() it works fine, but I need to get username somehow. Any tips? Thanks.

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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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  • 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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  • How to preserve object identity across different VMs

    - by wheleph
    To be specific let me illustrate the question with Spring http-remoting example. Suppose we have such implementation of a simple interface: public SearchServiceImpl implements SearchService { public SearchJdo processSearch(SearchJdo search) { search.name = "a funky name"; return search; } } SearchJdo is itself a simple POJO. Now when we call the method from a client through http-remoting we'll get: public class HTTPClient { public static void main(final String[] arguments) { final ApplicationContext context = new ClassPathXmlApplicationContext( "spring-http-client-config.xml"); final SearchService searchService = (SearchService) context.getBean("searchService"); SearchJdo search = new SearchJdo(); search.name = "myName"; // this method actually returns the same object it gets as an argument SearchJdo search2 = searchService.processSearch(search); System.out.println(search == search2); // prints "false" } } The problem is that the search objects are different because of serializaton although from logical prospective they are the same. The question is whether there are some technique that allows to support or emulate object identity across VMs.

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  • Wordpress API: Add / Remove Tags on Posts

    - by st4ck0v3rfl0w
    I know it seems like a simple operation, but I can't find any resource or documentation that explains how to programmatically add and remove tags to a post using the post ID. Below is a sample of what I'm using, but it seems to overwrite all the other tags... function addTerm($id, $tax, $term) { $term_id = is_term($term); $term_id = intval($term_id); if (!$term_id) { $term_id = wp_insert_term($term, $tax); $term_id = $term_id['term_id']; $term_id = intval($term_id); } $result = wp_set_object_terms($id, array($term_id), $tax, FALSE); return $result; }

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  • Server -> Desktop Push API

    - by Rich Anderson
    Hi I am looking for solution which can push automatically a certain event (let's say RSS message) realtime to a desktop user. A toolbar app or a desktop (growl like) will be super for this push. I have looked at few options but cannot find much info on these kind of apps. I have looked at conduit - it sucks as there is lot of other fancy options which I am not interested in offering to users. Please let me know. Thanks.

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  • Client-side or server-side processing?

    - by Nick
    So, I'm new to dynamic web design (my sites have been mostly static with some PHP), and I'm trying to learn the latest technologies in web development (which seems to be AJAX), and I was wondering, if you're transferring a lot of data, is it better to construct the page on the server and "push" it to the user, or is it better to "pull" the data needed and create the HTML around it on the clientside using JavaScript? More specifically, I'm using CodeIgniter as my PHP framework, and jQuery for JavaScript, and if I wanted to display a table of data to the user (dynamically), would it be better to format the HTML using CodeIgniter (create the tables, add CSS classes to elements, etc..), or would it be better to just serve the raw data using JSON and then build it into a table with jQuery? My intuition says to do it clientside, as it would save bandwidth and the page would probably load quicker with the new JavaScript optimizations all these browsers have now, however, then the site would break for someone not using JavaScript... Thanks for the help

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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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  • DRb connecting to linux client from windows

    - by Christopher Dancy
    I have a few DRb services running on different windows machines and they can all connect and talk with each other just fine. When I put these DRb services on Linux machines and try to connect from windows nothing happens and I get a DRB:ConnError ... the service on Linux is never touched. So I did a netstat on the linux box and the service(port) were not listed anywhere even though the program is clearly running. Is there someting that I'm missing when talking to DRb services on Linux from a windows machine?

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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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  • 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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  • Saving a movie generated with Jython/JES on local disk

    - by Golgauth
    I made an autogenerated movie clip using JES (Jython Environment for Students). I can play it without any problem using playMovie(), but I can't figure out how to have it saved physically on disk. The full script is located here. ... movie = synthesizeFrameAndCreateMovie("D:\\FOLDER") print movie writeQuicktime(movie,"D:\\FOLDER\\movie.mov", 30) [LINE 35] #playMovie(movie) I get this error when calling the function writeQuicktime(): >>> ======= Loading Progam ======= Movie, frames: 60 The error was: Index: 0, Size: 0 I wasn't able to do what you wanted. The error java.lang.IndexOutOfBoundsException has occured Please check line 35 Note : I also tried the function writeAVI(), with the exact same result. This error sounds like a java bug in Jython/JES library. I am running JES under Windows 7 and have all the common Quicktime and AVI codex installed as well as the QTjava library in my jre... Any brilliant idea ? EDIT : Also tried the Linux version with same result for both QuickTime and AVI...

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  • due at midnight - program compiles but has logic error(s)

    - by Leslie Laraia
    not sure why this program isn't working. it compiles, but doesn't provide the expected output. the input file is basically just this: Smith 80000 Jones 100000 Scott 75000 Washington 110000 Duffy 125000 Jacobs 67000 Here is the program: import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; /** * * @author Leslie */ public class Election { /** * @param args the command line arguments */ public static void main(String[] args) throws FileNotFoundException { // TODO code application logic here File inputFile = new File("C:\\Users\\Leslie\\Desktop\\votes.txt"); Scanner in = new Scanner(inputFile); int x = 0; String line = ""; Scanner lineScanner = new Scanner(line); line = in.nextLine(); while (in.hasNextLine()) { line = in.nextLine(); x++; } String[] senatorName = new String[x]; int[] votenumber = new int[x]; double[] votepercent = new double[x]; System.out.printf("%44s", "Election Results for State Senator"); System.out.println(); System.out.printf("%-22s", "Candidate"); //Prints the column headings to the screen System.out.printf("%22s", "Votes Received"); System.out.printf("%22s", "%of Total Votes"); int i; for(i=0; i<x; i++) { while(in.hasNextLine()) { line = in.nextLine(); String candidateName = lineScanner.next(); String candidate = candidateName.trim(); senatorName[i] = candidate; int votevalue = lineScanner.nextInt(); votenumber[i] = votevalue; } } votepercent = percentages(votenumber, x); for (i = 0; i < x; i++) { System.out.println(); System.out.printf("%-22s", senatorName[i]); System.out.printf("%22d", votenumber[i]); System.out.printf("%22.2f", votepercent[i]); System.out.println(); } } public static double [] percentages(int[] votenumber, int z) { double [] percentage = new double [z]; double total = 0; for (double element : votenumber) { total = total + element; } for(int i=0; i < votenumber.length; i++) { int y = votenumber[i]; percentage[i] = (y/total) * 100; } return percentage; } }

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  • How to tell a method has a varargs argument using reflection?

    - by Anthony Kong
    Here is a sample code package org.example; import java.lang.reflect.Method; class TestRef { public void testA(String ... a) { for (String i : a) { System.out.println(i); } } public static void main(String[] args){ Class testRefClass = TestRef.class; for (Method m: testRefClass.getMethods()) { if (m.getName() == "testA") { System.out.println(m); } } } } The output is public void org.example.TestRef.testA(java.lang.String[]) So the signature of the method is reported to take a array of String. Is there any mean in the reflection library I can tell that the method is originally declared to take a varargs?

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  • Web based client for Amazon S3

    - by Dick Lebavo
    We are looking for a secure online solution to access our files stored on Amazon S3. We have about 3K files, mostly media and documents, that we need to make available to our employees on the move. We don't want to develop anything in-house if there is an existing solution. Please note that our employees are not technologically minded , so a simple web based upload/download GUI would work the best.

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  • How to keep Hibernate mapping use under control as requirements grow

    - by David Plumpton
    I've worked on a number of Java web apps where persistence is via Hibernate, and we start off with some central class (e.g. an insurance application) without any time being spent considering how to break things up into manageable chunks. Over time as features are added we add more mappings (rates, clients, addresses, etc.) and then amount of time spent saving and loading an insurance object and everything it connects to grows. In particular you get close to a go-live date and performance testing with larger amounts of data in each table is starting to demonstrate that it's all too slow. Obviously there are a number of ways that we could attempt to partition things up, e.g. map only the client classes for the client CRUD screens, etc., which would have been better to get in place earlier rather than trying to work it in at the end of the dev cycle. I'm just wondering if there are recommendations about ways to handle/mitigate this.

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  • How to test for secure SMTP mail service on a mail server

    - by Vinay S Shenoy
    I'm working on a project to auto-configure a user's email server settings in Java. I am extracting the mail server from his email address and looking up the MX records of that mail server using the DirContext class with com.sun.jndi.dns.DnsContextFactory. Then I'm opening a Socket to each server and testing them using a HELO command and checking the responses. My problem is that this works only when I test it with the unsecure SMTP port 25. How can I use it with the secure port 465? I tried using Secure Sockets by using SSLSocketFactory sslsocketfactory = (SSLSocketFactory)SSLSocketFactory.getDefault(); SSLSocket socket = (SSLSocket)sslsocketfactory.createSocket(mailserver, STANDARD_SMTP_PORT); But all connections get a timeout exception as follows alt1.gmail-smtp-in.l.google.com. java.net.ConnectException: Operation timed out Please help.

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  • Singletons and other design issues

    - by Ahmed Saleh
    I have worked using different languages like C++/Java and currently AS3. Most applications were computer vision, and small 2D computer games. Most companies that I have worked for, they use Singletons in a language like AS3, to retrieve elements or classes in an easy way. Their problem is basically they needs some variables or to call other functions from other classes. In a language like AS3, there is no private constructor, and they write a hacky code to prevent new instances. In Java and C++ I also faced the situation that I need to use other classe's members or to call their functions in different classes. The question is, is there a better or another design, to let other classes interact with each others without using singletons? I feel that composition is the answer, but I need more detailed solutions or design suggestions.

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