java byte code editor [duplicate] - java

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Closed 10 years ago.
Possible Duplicate:
java bytecode editor?
I'm looking for a java Byte-code editor with following features minimum.
GUI - simple to load class files and view the byte code
Edit the java byte code and save it

Google jasper and jasmin. Also check out Disassembler Debugger for Java. I don't think there is any 'GUI' based implementation, although i can be wrong.

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where can I find the sourcecode of predefined methods/classes in java? [duplicate]

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Where can I find the Java JDK source code? [closed]
(11 answers)
Closed 4 years ago.
Java has number of predefined methods, but where to find the source code of these methods ?
In the JDK folder, there will be src.zip
C:\Program Files\Java\jdk1.8.X_XXX\src.zip
If you want to see the source code of the Java Classes,
Open the Java Class -> Attach Source [If the source was not already attached] -> Point to the src.zip
Now the Source code for Java classes will be displayed in the editor

Where can I see the definitions of native methods in java? [duplicate]

This question already has answers here:
Is the source code of native methods available?
(2 answers)
Closed 8 years ago.
Using eclipse, I see that methods like System.nanotime() or System.arraycopy() are native.
However I could not see the definitions of these methods.
Where are can I find the definitions , and more importantly what language are those methods written in ?
Install the Java SE Development Kit from http://java.sun.com/javase/downloads/index.jsp.
Once installed, you should find an archive called src.zip in the top of the JDK installation directory. The Java source code is in there.

Is there any program like LINQPad for Java? (Not a duplicate!) [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
Is there any program like LINQPad for Java?
My question is similar to Is there any program like LINQPad for Java?, but not the same.
Like the author of the original question, I am not interested in the database quering capabilities provided by LinqPad.
What I am looking for is a desktop utility to run short java code snippets. I am not interested in any web based solutions, so groovy web console is out of the question.
(Showing Java byte code is a bonus, but not a must)
Thanks.
This can be done using Eclipse scrapbook pages.

Check if screensaver is active [duplicate]

This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
How to determine if a screensaver is running in Java?
is there any way you can find out if the screensaver is active with java? I've searched the web but the only things I found was very complicated native code... My program is made for windows only.
Java cannot handle system tasks directly.
You should use JNI (Java Native Interface) or JNA (Java Native Access) to do it.
I haven't tried this code, but they claim to answer your question with JNA as Ammar suggested: Screen Saver State.

Java/Scala library to generate Java source code [duplicate]

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Closed 12 years ago.
Possible Duplicate:
A Java API to generate Java source files
Is there a good library for generating Java source code (not bytecode)?
CodeModel and Eclipse JDT worked for this fellow, and he ultimately chose CodeModel.
Try this http://code.google.com/p/javaparser/ i use this to rewrite huge portions of my existing code base, also ASTs can be constructed with this and it is a readable wrapper written over eclipse core....

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