Some of the shortcut keys that I find useful are for reference only.
1.alt + SHIFT + C: Change the method signature.
2. Three left mouse clicks: Selects an entire row.
3.alt + SHIFT + d/x: Press T again: Run JUnit.
4.ctrl + H: Open file Lookup for various lookups.
5.ctrl + ALT + Down: Copies the current line to the next line.
6.ctrl + E: Displays the file being edited for switching.
7.ctrl + SHIFT + G: View callers, usually to see where a class is called.
8.ctrl + ALT + H: View callers, usually to see where a method is called, or to see where a string is being used.
9.ctrl + ALT + G: View used, usually view no where a string is used. The main use of 7,8 is to view class and method calls.
10.ctrl + SHIFT + O: Quickly remove the extra import lines, this is useful, usually delete some of the code will be more invalid import lines, if the single-row deletion is unprofessional.
11.window + Open Perspective: Opens and toggles different editing windows. such as the installation of Pydev plug-ins, PHP plug-ins, etc., you can turn these windows out.
12.ctrl + F: Find, then use CTRL + K/ctrl + SHIFT + K: quickly look down or up to find a matching string.
As a motivational to be called the Professional Program Ape Rookie, Master shortcut keys, abandon the mouse, this is the ultimate goal.
Follow-up replenishment.
Eclipse summarizes the eclipse shortcuts that you use frequently in your work