How can I add class folders into Eclipse?

Question

Eclipse is set to compile to a build directory at \'bin\'. I have a folder structure with various Java .class files (precompiled) which I want to copy into the folder \'bin\

Answer 1

The 'Add Class Folder...' and 'Add External Class Folder...' buttons under 'Java Build Path' in the project properties seem to do exactly what you want.