I want to add a breakpoint in a class in Eclipse, but I don't have the source code for it. Is it possible to add a breakpoint in it anyway? In my case I really only need to know when a method is called.
(As a side note: does anyone have the source code for j2ee_api_1_3.jar?)
If you open the outline view, you can select a method, right-click and select Toggle Method Breakpoint, this will then break whenever the method is hit.
You may be able to get the sources from Sun's archive download page
It depends, I think, on whether the class was compiled with debug information. If so, then the class file contains meta-data such as line numbers and parameter names which the debugger needs to make a decent fist of it. If not, then the debugger has less information to go on.
JavaEE libraries are notorious for not having debug meta-data compiled into them. It can be quite frustrating.
Download jad decompiler /configure its path in eclipse through windows->preferences and open the source of the class where you need to place the breakpoint - and then debug can run as it does normally and you can see all the variable information in the variable view.