Project in Eclipse that builds a jar used by another project in Eclipse

I have several projects open in Eclipse. One of them is the main app, and others build jars used by that main app. How do I make it so that when I hit F3 on a method call in the main app that it takes me to the source in the other project instead of taking me to the class file in the Libraries list? I got it so that it shows me the source, but I can't actually edit it like it could if I go to the other project, and similarly when I step through in the debugger it doesn't go into the editable code.

I don't know if it开发者_运维技巧's relevant, but we're using Maven to handle the dependencies.

I know this should be simple, but I haven't found the option.

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Instead of including the other projects' jars in the main app on its library path, include the projects as dependencies in the "Projects" tab inside the Project Properties dialog.

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If you right-click the JAR file on your main project, you can use "Attach Source" option to use F3 to navigate to methods when needed.