If you upgraded to the Eclipse 3.4, you may have noticed that the shortcut key for Running the Last Launched does not work properly. In older versions of Eclipse, CTRL+F11 used to run the last launched application or Junit test. By default, in Eclipse 3.4, this is used to run the *.java file that currently has focus.
If you would like to change this functionality back, just follow these instructions:
1. Open Eclipse Preferences by Navigating to Window -> Preferences
2. Using the Tree, Navigate to Run/Debug -> Launching
3. Here you will find the group called Launch Operation
4. Choose the option that says Always launch the previously launched application
Enjoy and pay it forward!!!