How to see the source code for java SDK (java.lang, java.util, …) classes in Eclipse?

Question

I want to read jar class files into my eclipse. Suppose I wrote the following code:

List list = new ArrayList();

When I ctrl click on List, it

Answer 1

See if you have a src.zip file in your JDK Home. This would contain the source code for all Java SE libraries. Just unzip and browse the Java files to view the source code.

If you want to debug through the source files then follow the instructions of attaching source folder in Eclipse as mentioned above.