Source code for the Java library classes

Question

Where can I find the source code for the Java library classes? I mean classes in rt.jar.

Platform: Windows.

Answer 1

You can directly browse the code online here for Java : https://zgrepcode.com/java/openjdk/10.0.2/

It is a great tool also for browsing most of the open source projects as it gives you internal linking to classes.

Answer 2

Download the JDK. The sources for the public classes are in src.zip.

Answer 3

As mention above, most of the source files can be found by downloading the SDK. However for some classes you can find the source code (javax.ssl etc') for I suggest adding the jad eclipse plugin that will decompile any class without using external site such as Docjar. Jad eclipse info: http://jadclipse.sourceforge.net/wiki/index.php/Main_Page

Answer 4

As almost all the suggestions seem to be either grepcode or zgrepcode which are both down, I found one from OpenJDK here: http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/tip/src/share/classes/

Edit: a more complete version of all OpenJDK projects and JDK 6-15 can be found here: https://hg.openjdk.java.net/

Answer 5

There is also grepcode.com (not sure how old this site is, perhaps this answer is an update for new solutions now), sample query:

http://grepcode.com/search?query=java.lang.Math.sin&start=0&entity=type&n=

Answer 6

If you only need to have a look at the source/implemenation, i would suggest using

Docjar

Edit

GrepCode is even better

GrepCode