<p>I have been using Eclipse as an IDE for a short amount of time (about 3 months of full use) and almost every day I learn about some shortcut or feature that I had absolutely no idea about.  For instance, just today I learned that <kbd>Ctrl</kbd>+<kbd>3</kbd> was the shortcut for a Quick Access window.</p>

<p>I was wondering what your most useful/favorite Eclipse features are.  With the IDE being so big, it would be helpful to learn about the more commonly used parts of the program.</p>

Ctrl
-
Alt
(
up
/
down
)  Copy selected line(s) above or below current line.
Alt
(
up
/
down
)  Move current (or multiple selected) lines up or down
Ctrl
-
Shift
-
R
Bring up the resource window, start typing to find class/resource
Ctrl
-
O
Bring up all methods and fields for the current class. Hitting it again will bring up all methods and fields for current class and super classes.
Ctrl
-
/
or
Ctrl
-
Alt
-
C
Comment single or multiple lines with //
Ctrl
-
Shift
-
/
Comment selected lines with /* */
Ctrl
-
.
Take you to the next error or warning line