Go to JDK source code for eclipse debugging

For those who want to know the JDK source code, it is a common method to debug the JDK source code.

If the JDK Source Code cannot be accessed during debugging, and most of the errors are line unavailable, you need to set them.

[Window]-[preference]-[Java]-[installed jres]

Here we can see the Java environment that eclipse can use. By default, JRE (Java Runtime Environment) is used, which does not support debugging and must be replaced with JDK (Java Development Kit ).

[Add]-[next]-[add JRE]

In directory, select the JDK directory installed on the machine, instead of the JRE directory. The jarfiles of JDK are all selected as the source. If not, manually set them.

Then, select JDK.

Then, use the JDK just added in the [Build path] of the project to remove the default JRE reference.

End.