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• Data Structure Brushup (Java)

  - by Daddy Warbox

  This should be easy for many of you, but for me it's just another bit of rust needing to be chipped away as I get back into basic Java coding. Using bloody associative arrays for so long in other languages have turned me nice and spoiled. :P My problem is simple: I'm storing a set of objects, each containing a string and a number, in a list. I would like each object inserted into this list to be sorted alphabetically by its string. I would also like to be able to retrieve objects from the list by their string as well. I would like to do this as formally and/or efficiently as possible. Is there something already available in the Java standard libraries for this?

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• Getting file path in java

  - by markovuksanovic

  Is there a way for java program to determine its location in the file system?

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• Open source 3D render engine for Java

  - by SamSol

  Which are the Open source 3D render engines for Java?

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• deligation example regarding java context

  - by user298295

  What is deligation in Java? Can anyone give me proper example?

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• Roles in Java Google App Engine

  - by Dan

  Does anyone have any recommendations for me on how to manage user roles on the Java version of Google App Engine?

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• System.Diagnostics.Debugger.Break() like using java?

  - by tienph

  Is there a method to signal a breakpoint in Java like System.Diagnostics.Debugger.Break() in C#?

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• Get 48x48 icon size of any file, folder or drive in java

  - by SamSol

  How to get 48x48 icon size of any file, folder or drive in java?

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• (Java) Good Libraries and What they are.

  - by Tom Neyland

  Lets compile a list of 3rd party java libraries that we like and/or find useful. I will post my choices as a reply

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• Generic arrays of parametrized ArrayLists in java?

  - by athena123

  I am new to Java, so I am not aware of the nitty gritties. Why can't I create generic array of parametrized ArrayList? Instead I have to write, ArrayList<String>[] alist = new ArrayList[10]; or I have to create List of ArrayLists. Aren't arrays supposed to be more efficient than ArrayLists? Then why doesn't Java allow it? Also, what is the difference between following two lines. ArrayList<String>[] alist = new ArrayList[10]; ArrayList<String>[] alist = new ArrayList<?>[10];

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• Advantages and Disadvantages of .NET Java

  - by destructo_gold

  What are advantages and disadvantages of Java and .NET in terms of their support for architecture independence and portability of exes?

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• Java: do arrays have a maximum size?

  - by Lizard

  Is there a limit for an array in Java? Thanks

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• for (Object object : list) [java] construction

  - by EugeneP

  My question, is, whether the sequence of elements picked from a list will always be the same, is this construction behaviour is deterministic for java "List"s - descendants of java.util.List 2) question, if I use for(Object o: list) construction and inside the loop's body increment a variable, will it be the index of list's elements? So, how it goes through list's elements, from 0 to size()-1 or chaotically? List.get(i) will always return this element? 3) question ( I suppose for the 2-nd question the answer will be negative, so:) for (int i=0; i < list.size(); i++) { } is the best way if I need to save the index of an element and later get it back from a list by its id?

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• Java Thread wait() => blocked?

  - by Chris

  According to http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Thread.State.html calling wait() will result a thread to go in BLOCKED state. However this piece of code will result (after being called) in a Thread in WAITING State. class bThread extends Thread { public synchronized void run() { try { wait(); } catch (InterruptedException e) { e.printStackTrace(); } } } Have I got something wrong? Can anybody explain this behaviour to me? Any help would be appreciated!

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• java.util.EmptyStackException on JIT/Warmup

  - by infectedrhythms

  I'm using a 3rd party lib in my application that throws a java.util.EmptyStackException This only happens during the VM JIT/Warmup Start application Start stress test no rampup. java.util.EmptyStackException thrown Keep application and redo stress test. No exception thrown Shutdown application Start application Start stress test with rampup. No exception thrown I could keep reproducing this over and over. Anyone have any ideas on how I can trace this so I can give more info to the vendor? Or why it could even be happening? Thanks

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• what is "Java beans"?

  - by bhavna raghuvanshi

  Can anyone tell me what exactly "Java beans" is and why is it used?

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• C++ equivalent of java.lang.Integer.MIN_VALUE

  - by Rui

  How can I get an equivalent of java.lang.Integer.MIN_VALUE on C++?

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• final interface in java?

  - by JavaUser

  Can an interface be declared as final in Java?

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• For consuming a web service method using javascript in HTML,do we need to add any htc to the web dir

  - by Sumedh

  For consuming a web service method using javascript in HTML,do we need to add any htc to the web directory?

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• Java reference type

  - by Codenotguru

  How does Java deal with passing reference data type arguments?? Can somebody give a clear picture?

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• Java: unmark file is read-only

  - by Zombies

  Can I do this on Java? I'm using windows...

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• Java Programming Help

  - by user215049

  hi, im a bit confused on this and i dont know how to solve this question that i have been asked, id be grateful if you could assist me on this question, maybe try to tell me what needs to be done, and how. the question is: Write a method called countChars which takes an InputStream as a parameter, reads the stream and returns the number of characters it contains as an int. Any IOExceptions which might occur in the method should be passed back to the method's caller. Note that the method header should show that it is possible that an exception might occur. i attempted this question with the following code: public class countChars { public int countChars(int InputStream) { return InputStream; } } and i get an error message saying : Main.java:26: cannot find symbol symbol : method countChars(java.io.InputStream) location: class Main s1 = "" + countChars(f1); ^ 1 error

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• I need something to automate web browser tasks in its own virtual enviorment (Chrome)

  - by user1745926

  Ever since i started learning java i wanted to create a way to automate a few actions on a couple websites, For example, topline is a website that replaces all your ads with its own ads and pays you a bit of money for it, i want to emulate the act of just surfing the web, then start emulating specific tasks like clicking certain buttons or playing flash games (Actually playing the game by using image recognition) and this has to be written in java as i want to run this on a raspberry pi. any help is appreciated, is there a class that i can use? any help is appreciated!

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• How to handle NullPointerException in Java [closed]

  - by rozer

  How to handle NullPointerException in Java? Please provide details so I can get rid of this problem

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• Open source laf[look n feel] for java swing application

  - by SamSol

  Which are Open source lafs[look n feel] for java swing application?

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• Java Garbage Collection

  - by Codenotguru

  How does garbage collection in Java takes place when two objects are referencing each other?

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