Eclipse – How to attach JDK source code
This article shows you how to attach the JDK source code in Eclipse IDE.
In Eclipse, select Windows -> Preferences -> Java -> Installed JREs , expands
rt.jar, select “Source attachment” and find the
src.zip from your disk drive.
P.S JDK source code is inside the
You may interest at this article – where to download JDK source code.