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• Why reduce the size of the Java JVM thread stack?

  - by djangofan

  I was reading an article on handling Out Of Memory error conditions in Java (and on JBoss platform) and I saw this suggestion to reduce the size of the threadstack. Can anyone explain how "reducing" the size of threadstack will help with a max memory error condition? http://community.jboss.org/wiki/OutOfMemoryExceptions

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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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• Is there something like the OllyDbg / SoftICE disassembler + debugger for java?

  - by Ran Biron

  Is there a utility similar to OllyDbg / SoftICE for java? I.e. execute class (from jar / with class path) and, without source code, show the disassembly of the intermediate code with ability to step through / step over / search for references / edit specific intermediate code in memory / apply edit to file... If not, is it even possible to write something like this (assuming we're willing to live without hotspot for the debug duration)?

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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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• 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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• 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 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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• Are there any embeddable document database engines for Java? Something similar to MongoDB or CouchDB

  - by Juha Syrjälä

  Are there any embeddable document database engines for Java, that do not require separate server. I am looking for something similar to MongoDB or CouchDB.

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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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• 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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• 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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• 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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• How to map character to numeric position in java?

  - by Alex

  E.g. input: ['A', 'Z', 'F', 'D', ...] output: [0, 25, 5, 3, ...] In C I'd just subtract the char from 'A', but I don't seem to be able to do this in java.

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• Get Java to use tabs instead of spaces for indenting.

  - by tumba25

  I'm creating an XML document. I got it to indent using TransformerFactory.setAttribute("indent-number", new Integer(2)); Transformer.setOutputProperty(OutputKeys.INDENT, "yes"); Is it possible to get Java to use tabs instead of spaces for indenting? And how?

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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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• 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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• 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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• 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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• 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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• 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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• 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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• Can all the attibutes of a node in an XML be grouped using JAVA?

  - by Kris

  I am trying to re-arrange all the attributes of the XML file. Need to group all the attributes of each node. Here is the required output XML file: Can this be possible with XML DOM in JAVA?

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• How can I cancel Drag and Drop operation in Java/Swing programmatically?

  - by AlexV

  I am just wondering if it's possible to I cancel "Drag and Drop" operation in Java/Swing programmatically? So the effect would be similar to if the user pressed the "ESC" key? I was expecting DragSourceDragEvent or DragSourceContext to have a cancelDrag() method, similar to DropTargetDragEvent which has acceptDrag() and rejectDrag() methods (both of which does not do what I want). I am missing something?

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• How can I make a resizable array in Java?

  - by Soren Johnson

  What is the best way to do a resizable array in Java? I tried using Vector, but that shifts all elements over by when when you do an insert, and I need an array that can grow but the elements stay in place. I'm sure there's a simple answer for this, but I still not quite sure.

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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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