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Although LCR allows you to see changes without restarting your app, you still need to "build" your project (to compile the Java source into byte code). Your IDE can be set to do this automatically every time you save a file. (In Eclipse, this is done using Project > Build Automatically.) Alternatively, you can manually trigger a build every after you save a file. (In Eclipse, this is done using Project > Build, or by pressing Control-B.)

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