Java Debugging: Source not found

Question

I am having a problem with Eclipse where I can run my program just fine, but when I try to start the debugger, I get this message

Answer 1

Do you have the sources for the files that you are using. If you are using Maven (M2Eclipse) you could download the sources. This might solve the problem.

Otherwise you could go and manually attach your sources. Here is how you manually attach sources.

Next you have to attach the sources-

Hope this helps