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• Good concurrency example of Java vs. Clojure

  - by Michiel Borkent

  Clojure is said to be a language that makes multi-thread programming easier. From the Clojure.org website: Clojure simplifies multi-threaded programming in several ways. Now I'm looking for a non-trivial problem solved in Java and in Clojure so I can compare/contrast their simplicity. Anyone?

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• couldn't start a java application as a windows service

  - by rgksugan

  I have written a java application which is a RMI server. I need to start rmiregistry to run this application and i also want my apllication to start automatically when the system starts. I have converted my application into a windows servise. When i try to start my service it shows this error Error 1067: The process terminated unexpectedly Is it because my program throws an exception when my application is started before the rmiregistry is started.

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• Common Ancestor to Java Array and List

  - by Phuong Nguyen de ManCity fan

  In .NET, both array and list have Enumerable as ancestor, so a method that accept Enumerable as an argument can receive both array and list as its argument. I wonder if there is a similar thing in Java?

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• Java Packages in Seperate repository than others

  - by sethxian

  I was wondering if it's possible to have a java package setup using a different subversion repository than the rest. Ideally, I would probably go with a different library project, but in the case of BlackBerry, the 3rd party library linking does not work well, so I would like to just separate my UI package into a different repository than the rest so that I can control the UI better for different OS versions, but leave all the other packages the same. Is this possible?

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• Running a Java program with input from a file

  - by Katy

  I am writing a program that reads the input from a file and then prints it to the screen. When I run it without taking the input from the file, it works perfectly fine. However, every time I try to run it from the file it gives me an "Exception in thread "main" java.util.NoSuchElementException: No line found at" error that occurs every place the input is suppose to be read. I have no idea what is going on.

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• How to capture video from webcam(in java)?

  - by user243680

  I want to develop an application in java to capture video from webcam and store it onto a particular location.Can anyone provide me the working code? What type(usb,ip etc..) of webcam is the best in order to develop the application. Please help me. how to proceed?

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• Java's equivalent to bisect in python

  - by systemsfault

  Hello all, Is there a java equivalent to python's bisect library? With python's bisect you can do array bisection with directions. For instance bisect.bisect_left does: Locate the proper insertion point for item in list to maintain sorted order. The parameters lo and hi may be used to specify a subset of the list which should be considered; by default the entire list is used.

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• Parallel Web Service Calls in Java

  - by java_pill

  Is there anyway to make web service calls from a Java client app. (Apache Axis based) in parallel? Does async style Web Service client (Apache Axis based) help?

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• Wrapper class for HttpGet / Post in Java?

  - by Tim Green

  Hi, Sorry, I'm quite new to Java. I've stumbled across HttpGet and HttpPost which seem to be perfect for my needs, but a little long winded. I have written a rather bad wrapper class, but does anyone know of where to get a better one? Ideally, I'd be able to do String response = fetchContent("http://url/", postdata); where postdata is optional. Thanks!

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• Replacement for java.util.zip for streaming usage?

  - by evilfred

  java.util.zip sucks for stream compression. The longer you leave an Inflator/Deflator open without calling end(), the more native memory it uses up. This is a known issue: http://bugs.sun.com/view_bug.do?bug_id=4797189 which nobody seems to care about fixing. What is a good alternative? Preferably one that is free and is still actively supported by its developers.

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• What is the significance of the reverse domain name for java package structure

  - by Vaishak Suresh

  Why do we use reverse domain name like com.something. or org.something. structure for java packages? I understand this brings in some sort of uniqueness, but why do we need this uniqueness?

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• Do you find java.util.logging sufficient?

  - by Yuval A

  Per the title, do you find the default Java logging framework sufficient for your needs? Do you use alternative logging services such as log4j or others? If so, why? I'd like to hear any advice you have regarding logging requirements in different types of projects, and when integrating frameworks is actually necessary and/or useful.

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• Resize form objects in Java

  - by PeerFull

  I have a Java applet, which is a form that draw shapes into it (Rect, Oval, Line). Each shape is represented by 2 points and can draw itself to the form. When the JApplet form resizes, I need to resize the shapes also while keeping the aspect ratio. I didn't find an high quality solution for doing this that solves this problem. Tried to write a solution from this, but it came up as lousy when tested, Can someone publish an example code for doing that please?

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• Convert string from UTF-8 to ISO 8859-1 in Java

  - by Derk

  I want to encode a UTF-8 string to a ISO 8859- string in Java I have this: String title = new String(item.getTitle().getText().getBytes("ISO-8859-1")); But it isn't working, the output is Sørensen for example

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• About using OpenCV library in Java.

  - by Chetan

  Hi i am using Ubuntu linux, I have installed OpenCV library. How to use OpenCV library in Java programming?

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• Should Java raw types be deprecated?

  - by Paul Croarkin

  Should a future release of Java deprecate the use of raw types to force the migration to generics? I could also see having raw types not allowed by default but allowing them via a compile flag for legacy code.

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• Java: ECC (error correcting code) library?

  - by Jason S

  Is there a well-known implementation, that has friendly open-source licensing (not GPL), of an ECC (error correcting code) library (e.g. Reed-Solomon) for Java?

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• How to convert ascii to hexadecimal values in java

  - by lakshmi

  How to convert ascii to hexadecimal values in java . For Example ascii:31 32 2E 30 31 33 to hex:12.013. can any one please help me... thanks in advance.

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• Is Java Swing still in use?

  - by Mark Szymanski

  I am planning on making a Java Swing application and was wondering if Swing is still used or if it has been replaced with something else. Thanks in advance!

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• Equivalent of IllegalArgumentException of Java in C++

  - by vito

  In Java if an input argument to a method is invalid, we can throw an IllegalArgumentException (which is of type RuntimeException). In C++, there is no notion of checked and unchecked exceptions. Is there a similar exception in standard C++ which can be used to indicate a runtime exception? Or is there a common style not in the standard but everyone follows in practice for a situation like this? Or, should I just create my own custom exception and throw it?

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• how to create a auto closing messagebox in java

  - by Nubkadiya

  i want to create a messagebox which will be automatically close without users input. i tried reading couple of java tutorials. its a timer class. but i couldnt find the code examples. can someone please help me to do it. a small code example would be great

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• Detect use of older Java libraries

  - by Tony Morris

  Is there a third party library to detect the use of a Java 1.5 library when compiling with a 1.5 compiler with -source 1.4 and -target 1.4? I could use a 1.4 rt.jar in the bootclasspath however I hope there is a better way. To be used, for example, to fail the compile/build if a newer library is used.

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• Java - get index of key in HashMap?

  - by llm

  In java if I am looping over the keySet() of a HashMap, how do I (inside the loop), get the numerical index of that key? Basically, as I loop through the map, I want to be able to get 0,1,2...I figure this would be cleaner than declaring an int and incrementing with each iteration. Thanks.

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• Java: iterating through list of lists?

  - by HH

  The question but in C#. So does Java have C#'s command? I need it for Matches-SearchTerm-Files-relationship. foreach(var i in BunchOfItems.SelectMany(k => k.Items)) {}

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• Java: Calculate distance between a large number of locations and performance

  - by Ally

  I'm creating an application that will tell a user how far away a large number of points are from their current position. Each point has a longitude and latitude. I've read over this article http://www.movable-type.co.uk/scripts/latlong.html and seen this post http://stackoverflow.com/questions/837872/calculate-distance-in-meters-when-you-know-longitude-and-latitude-in-java There are a number of calculations (50-200) that need carried about. If speed is more important than the accuracy of these calculations, which one is best?

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