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• How does Java handle integer underflows and overflows and how would you check for it?

  - by KushalP

  How does Java handle integer underflows and overflows? Leading on from that, how would you check/test that this is occurring?

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• Does exist a package manager ala easy_install for Java?

  - by systempuntoout

  Does exist a package manager ala easy_install or pip (Python) for Java? I'm looking for a solution usable from the command line and not from an Ide.

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• How to write modular code in netbeans java swing apllications?

  - by rgksugan

  I am creating my java Swing application in Netbeans. At present there are more than 2000 lines of code. Is it right to have these many number of lines in a single file. Moreover the IDE has become slow when i am editing this file. Is there any way to overcome this?

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• How can I transform latitude and longitude to x,y in Java?

  - by hory.incpp

  Hello, I am working on a geographic project in Java. The input are coordinates : 24.4444 N etc Output: a PLAIN map (not round) showing the point of the coordinates. I don't know the algorithm to transform from coordinates to x,y on a JComponent, can somebody help me? The map looks like this: http://upload.wikimedia.org/wikipedia/commons/7/74/Mercator-projection.jpg Thank you

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• What tools to use to build large java commercial projects ?

  - by openCage

  There are several tools to build java projects: ant mvn ivy buildr ... From my experience Ant is great for small projects and projects with special build requirements. Mvn is great for large but typical projects without too much special requirements. It also seams better for open source than for commercial projects. What would you recommend in case of large, enterprise, commercial projects ? What do you currently use and what would you rather use and why ?

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• Any complex example project for Java desktop-style GUI?

  - by Tong Wang

  I'd like to see how the code is organized and how the various GUI design patterns are applied. Anything Java and in desktop gui style is fine: GWT, Swing, SWT. Thanks.

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• Is there functionality to generate a random character in Java?

  - by Chris

  Does Java have any functionality to generate random characters or strings? Or must one simply pick a random integer and convert that integer's ascii code to a character?

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• Is there an equivalent of boost::multi_index for Java someplace?

  - by Chris Kaminski

  I stumbled upon multi_index on a lark last night while pounding my had against a collection that I need to access by 3 different key values, and also to have rebalancing array semantics. Well I got one of my two wishes (3 different key values) in boost::multi_index. I'm curious if anything similar exists in the Java world.

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• Java - How to set focus the already running application ?

  - by Brad

  I am using a ServerSocket port to run one instance only of my Java Swing application, so if a user tries to open another instance of the program, i show him a warning that "Another instance is already open". This works fine, but instead of showing this message i want to set focus on the running application itself, like some programs does (MSN Messenger), even if it was minimized. Is there a solution for this for various operating systems ?

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• How can we save Java Message Queues for reference?

  - by Ammar

  How can we keep track of every message that gets into our Java Message Queue? We need to save the message for later reference. We already log it into an application log (log4j) but we need to query them later.

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• How to get video and audio streams from web cameras with Java?

  - by Ole Jak

  How can I get video and audio streams from web cameras with Java (in a cross-platform way)? For example, we have a computer with 3-4 USB web cameras; we want to get their streams and make them visible in the user interface. How can we perform such a thing?

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• What happens when i use javaw to run the java program in the following scenario?

  - by GK

  Say suppose i am running a java program through command line. and this program requires some data to enter during the execution. So i was wondering on what happens if somebody uses javaw to run this type of program? that is how can enter the data to the program.

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• java: how can i trim beginning and ending double quote in a string ?

  - by ufk

  Hi All. I would like to trim a beginning and ending double quote (") from a string. how can I achieve that in java? thanks!

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• How to Determine the WSDL that will be Emitted for a Given Java Web Service?

  - by guptamukul

  Please tell me how to write wsdl file of service developed in java. For example: package fromjava.server; import javax.jws.WebService; import javax.jws.WebMethod; @WebService public class AddNumbersImpl { @WebMethod(action="addnumbers") public int addNumbers(int number1, int number2) { return (number1+number2); } } this is a web service....so what will be the corresponding wsdl file? if u guys have any tutorial then please help me out.

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• What's the quickest way to remove an element from a Map by value in Java?

  - by Supertux

  What's the quickest way to remove an element from a Map by value in Java? Currently I'm using: DomainObj valueToRemove = new DomainObj(); String removalKey = null; for (Map.Entry<String, DomainObj> entry : map.entrySet()) { if (valueToRemove.equals(entry.getValue())) { removalKey = entry.getKey(); break; } } if (removalKey != null) { map.remove(removalKey); }

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• What is the need of collection framework in java?

  - by JavaUser

  Hi, What is the need of Collection framework in Java since all the data operations(sorting/adding/deleting) are possible with Arrays and moreover array is suitable for memory consumption and performance is also better compared with Collections. Can anyone point me a real time data oriented example which shows the difference in both(array/Collections) of these implementations. Thx

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• Is there a method in Java that allows me to replace all HTML special characters into their encoded e

  - by Siracuse

  I have a textfile which my Java program is modifying and putting into an HTML file for display. However, this textfile contains lots of HTML unsafe characters such as "<" and the "" which would need to be encoded into & gt; (sans space) and & lt;. Is there some library method I can use to sanatize my text document to replace all these HTML special characters with their safe encoded equivelants?

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• Where is the best place to find pre-made, open source, java packages ?

  - by hory.incpp

  I am looking for something like a portal, or a community where everybody posts their contributions in Java. Ex. polynomial calculations, ... Scenario: Search - "polynomial" - download package (source code) Thank you.

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• What does the Java Tutorial Mean when it mentions "Unix-based Systems"? [closed]

  - by Tom Brito

  I am reading "The Java Tutorial", and they talk a lot about "Unix-based systems". Which systems are they referring to?

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• java: how can I create a dynamic array without forcing the type of the values?

  - by ufk

  Hiya. I need to create a dynamic array in Java, but the values type differ from String to Int to float. how can I create a dynamic list that I don't need to give it in advanced the type of the values? The keys just need to be ascending numbers (1,2,3,4 or 0,1,2,3,4) I checked ArrayList but it seems that I have to give it a fixed type for the values. thanks!

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• Is there a good java library for localized labels with database backing?

  - by Shaun F

  I'm looking for a good general library to grab localized labels for displaying on a web page. I've found some useful solutions at http://stackoverflow.com/questions/19295/database-backed-i18n-for-java-web-app and I will use them but I wanted to see if there was a standard library other than the fmt jstl tags that is already database backed.

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• Is there any way in Java to enforce a minimum window size?

  - by waitinforatrain

  Is there any way in Java to enforce a minimum window size? The last article I can find is from 1999, and has some complicated code to mimic the behaviour... http://www.javaworld.com/javaworld/javaqa/1999-10/03-qa-window.html Surely there is a simple method that can be used?

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• Is there open-source java/c/c++ framework for pipes-and-filters paradigm?

  - by Victor Sorokin

  I'm interested in open-source Java/C/C++ framework for pipes-and-filters (like described in that book) paradigm. Can you recommend some?

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• Java: how can I react to computer shutdown in windows xp?

  - by Stas

  Hi! Is it possible make some handler that will do something when user shutdown computer with Java on Windows XP (optional, win7)? How? Thanks.

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• How to get the linux folder and file icons and names in java?

  - by André

  I'm creating a tree of folders and files in java. Windows and OSX return the system icons and name with the following code: new JFileChooser().getIcon(File f); new JFileChooser().getName(File f); Is there any possibility to get the icons and name of unix systems?. A system command would be ok too. Thanks.

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