Ctrl + F11 is the "Run" keyboard shortcut in Eclipse.
But for me, that only works if a Main class is active in the editor. For any of the other 100+ java files in my workspace, eclipse pops up a dialog, complaining "Editor does not contain a main type".
This makes the Ctrl + F11 shortcut nearly useless. I either have to press Ctrl + Alt + T, name of main class, Ctrl + F11, or use the mouse.
Do I have something misconfigured? What can I do to make Ctrl + F11 really run my program, no matter which file is active in the editor? Or is everybody using the Ctrl + F11 shortcut like that?
edit: I'm using eclipse 3.5.0
Check the preferences, Launching section - you may want to switch from "launch selection" to "launch previously launched application".
You can configure Eclipse to always use the previously launched application: Window → Preferences → Run/Debug → Launching → Always launch the previously launched application. This almost always does what you want.
来源：https://stackoverflow.com/questions/2213075/eclipse-how-can-i-make-ctrlf11-work-no-matter-which-file-is-being-edited