For better experience while working in Jdeveloper 11g. We should rember few of the shortcut which we can always.
These are few short cut which i use always
Find Usages — Ctrl+Alt+U
Go To Java Type — Ctrl+Minus
Go To File — Ctrl+Alt+Minus
Show Overview — Ctrl+Shift+ Back Quote
Extract Method — Ctrl+Alt+X
Introduce Variable – Ctrl+Alt+V
Run Project — F11
Debug Project — Shift+F9
Quick JavaDoc — Ctrl+D
Reformat — Ctrl+Alt+L
You can also manage shortcut in Jdevloper IDE go to Tools -> Preferences -> Shortcut Keys section in JDeveloper 11g Preferences wizard: