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• Benchmarks for Single and MultiThreaded programs

  - by user280848

  Hi I am trying to compare the performance of Single and Multithreaded Java programs. Are there any single thread benchmarks which are available which I could then use and convert to their multithreaded version and compare the performance. Could anybody guide me as to what kind of programs(not very small) are suitable for this empirical comparison. Thanks in advance

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• autoreferencing this class to use in another for c++

  - by atomsfat

  in java we can do this: public class A{ public static void main(String...str){ B b = new B(); b.doSomething(this); //How I do this in c++ ? the this self reference } } public class B{ public void doSomething(A a){ //Importat stuff happen here } } How can I do the same but in c++, I mean the self reference of A to use the method in B ?

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• Can someone explain what does <? super T> mean and when should it be used and how this construction

  - by Roman

  I'm using generics rather long time but I've never used construction like List<? super T>. What does it mean? How to use it? How does it look after erasure? I also wonder: is it something standard in generic programming (template programming?) or it's just a java 'invention'? Does c#, for example, allow similar constructions?

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• Static member class - declare class private and class member package-private?

  - by Helper Method

  Consider you have the following class public class OuterClass { ... private static class InnerClass { int foo; int bar; } } I think I've read somewhere (but not the official Java Tutorial) that if I would declare the static member classes attributes private, the compiler had to generate some sort of accessor methods so that the outer class can actually access the static member class's (which is effectively a package-private top level class) attributes. Any ideas on that?

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• Iterator has .next(), is there a way to get the current element instead of the next one?

  - by ufk

  Hiya. I have an Iterator that I use on a hashmap, and i save and load the iterator. is there a way to get the previous key in the hashmap with Iterator? (Java.Util.Iterator) update I save it as an attribute in a Red5 connection and then load it back to continue working where i stopped. another update I'm iteratoring through the keyset of the hashmap

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• Iterator has .next() - is there a way to get the current element instead of the next one?

  - by ufk

  Hiya. I have an Iterator that I use on a HashMap, and i save and load the iterator. is there a way to get the previous key in the HashMap with Iterator? (java.util.Iterator) Update I save it as an attribute in a Red5 connection and then load it back to continue working where i stopped. Another update I'm iteratoring through the keyset of the HashMap

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• what is the code for the following?

  - by kkol

  a difficult one.. using classes of primitive types in java, like Integer, Float, Long, etc, write a code fragment using a method to double the value of a variable passed as an argument

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• Restrict access of web application other than localhost

  - by user206646

  Hi, I hv 3 java web-apps running in jetty and i want one of them to be accessed only through localhost. I dont want to write filter. Can it be done by modifying some jetty configuration?

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• 16 bits bit depth

  - by user287663

  Hi. I have an image viewed in an applet. How do I save the image as 16 bits bit depth png format? I'm using java.

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• url rewriting with antlr

  - by jgray

  My java program needs to rewrite urls in html (just in time). I am looking for the right tool and wonder if antlr is doing the job for me?

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• How to programatically insert image into Word document?

  - by sukhada garud

  hi I am just looking for that. Is it possible to insert image into MS Word document through Java? please reply....

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• read file using nio and write to servlet

  - by bhard

  Dear all, I wan to read a file and then write using java.nio and return it to servlet.i also want to check whether file has been downloaded or not.plz suggest.

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• Finding closest number in an array

  - by visu

  in an array first we have to find whether a desired number exists in that or not? if, not then how will i find nearer number to the given desired number in java.

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• What's the difference between calling MyClass.class and MyClass.getClass()

  - by Mocha

  MyClass.class and MyClass.getClass() both seem to return a java.lang.Class. Is there a subtle distinction or can they be used interchangeably? Also, is MyClass.class a public property of the superclass Class class? (I know this exists but can't seem to find any mention of it in the javadocs)

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• How Can I Implement This Function?

  - by hoora

  I'm a beginner and I want to write Java code in eclipse. This program takes two LinkedLists of integers (for example, a and b) and makes a LinkedList (for example d) in which every element is the sum of elements from a and b. However, I can't add these two elements from a and b because they are Objects Example: a=[3,4,6,7,8] b=[4,3,7,5,3,2,1] ------ d=[7,7,13,12,11,2,1]

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• Why do threads spontaneously awake from wait()?

  - by Zwei Steinen

  Hi, I was wondering why threads spontaneously awake from wait() in java. Is it a design decision? Is it a compromise?

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• How to "scan" a website (or page) for info, and bring it into my program?

  - by James

  Well, I'm pretty much trying to figure out how to pull information from a webpage, and bring it into my program (in Java). For example, if I know the exact page I want info from, for the sake of simplicity a Best Buy item page, how would I get the appropriate info I need off of that page? Like the title, price, description? What would this process even be called? I have no idea were to even begin researching this.

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• How to add Eclipse Task Tags programmatically (Eclipse Plugin development)?

  - by sebnem

  Hi, I am developing an Eclipse Plugin. I want to add my custom Task Tag programmatically within the plugin. (Lets say DOTHIS) Later, i want to list the lines marked with DOTHIS tag in my custom taskView I know that it is done using the Eclipse UI from Project Properties Java Compiler Task Tags New. and then in the task view by Configure Contents but how can i do these arranegments within the plugin? Thanks in advance.

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• Is it possible to access the Class object in a static method?

  - by Bears will eat you

  Consider the following Java class: public class Foo { public static void doStuff() { // boring stuff here } } Is it possible to access either the class literal Foo.class, or just the class name "Foo" from within a static method such as doStuff()? In a non-static method I would just call this.getClass(), but there is no this to use in a static method.

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• A debbugging test, suggestions needed.

  - by flash

  I am having a debugging test, as part of an interview.. I thought if any one can help with the approach, when I am faced with a large code base and have to find bugs inside that within an hour or two.This is going to be Core java based app (I guess) on Eclipse 3.2+

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• opencom IMetaArchitecture example

  - by psu

  hi , I am looking for an opencom example in java that uses IMetaArchitecture interface. I've seached the web but i didn't find anything. Help pls

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• red5 actionscript

  - by massi

  Hi all, How to get a parameter encode in the url ? for exemple, if we have an html file containning : how to get the value of a from application.java class ? Thanks

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• ArrayList of my objects, indexOf problem

  - by majtits

  Hello! I have problem with Java's ArrayList. I've created an Object, that contains two atributes, x and y. Now I've loaded some object in my ArrayList. Problem is that I don't know how to find index of some object with x atribute I'm searching. Is there any way to do this?

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• Tell me what's wrong [closed]

  - by steve care

  public class Sample { public static void main (String[]a){ int[] x; x = new int[10]; int i;' int n=0; for (i=0;i<=10;i++){ n++; x[i]=n; System.out.print(x[i] + " "); } } } the problem is I got an error of "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10"

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• toURI method of File transform space character into %20

  - by piero

  toURI method of File transform space character into %20 On windows XP with Java 6 public static void main(String[] args) { File f = new File("C:\\My dir\\test.txt"); URI uri = f.toURI(); System.out.println(f.getAbsolutePath()); System.out.println(uri); } C:\My dir\test.txt file:/C:/My%20dir/test.txt

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