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.
Related
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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
This question already has answers here:
javax vs java package
(8 answers)
Closed 7 years ago.
Is it true that javax packages, in the Java language, are not stable and can be deprecated in future versions? In most of our project we use the swing packages which are included in javax.
This is nothing to worry about. There are Java classes that have been deprecated for the last 15 years but they're still in the core libraries for backwards compatibility.
Even if a whole swathe of javax.* classes get deprecated, they won't disappear.
You might want to take a look at Java 9's modular system too.
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how to check the jdk version used to compile a .class file [duplicate]
(5 answers)
Closed 9 years ago.
Is it possible somehow to get java version that was used to build class? Is there are any information compiled into class file? Possible there is some specific headers/footers or something like that.
Yes. You can find the version of JDK on which the class was compiled. Refer here.
This question already has answers here:
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.
This question already has answers here:
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....