Let’s say you’re working on Project1, which is your main TiVo app.  You want to create a second project, Project2, that maybe has a piece of functionality you want to work on (or maybe have someone else work on) but you want to use it in your main app.

• If both Project1 and Project2 are in your Eclipse workspace, simply select Project1, right-click it and do ‘Properties’, then ‘Java Build Path’.  Click the ‘Projects’ tab, then add ‘Project2’.  Now you may use any Project2 classes in Project1.
• To simplify things, you can create a JAR file out of Project2, then reference it externally from Project1.  Once the Project2 JAR is created, you can add a reference to it in Project1.  Select Project1, right-click it and do ‘Properties’, then ‘Java Build Path’.  Click the ‘Libraries’ tab, then ‘Add External JARs…’  Add the Project2 JAR file.
• You may also choose to go one step further and actually make Project2’s JAR file a part of Project1.  One way to do this is to make a new folder in Project1 called ‘lib’ (right click the project, do ‘New – Folder’).  Then, drag Project2’s JAR file onto that ‘lib’ folder in Eclipse’s Package Explorer.  The JAR will be copied into the project.  Then, right-click on Project1, do ‘Properties’, then ‘Java Build Path’.  Click the ‘Libraries’ tab, then ‘Add JARs…’  Add the JAR file from the ‘lib’ directory.