JD-Eclipse is a plug-in for the Eclipse platform. It allows you to display all the Java sources during your debugging process, even if you do not have them all. Installation Download JD-Eclipse ZIP file, Launch Eclipse, Click on "Help > Install New Software...", Drag and drop ZIP file on dialog windows, Check "Java Decompiler Eclipse Plug-in", Click on "Next" and "Finish" buttons, A warning dialog windows appear because "org.jd.ide.eclipse.plugin_x.y.z.jar" is not signed. Click on "Install anyway" button.