1 The most important shortcut keys
Code Assistant: Ctrl+Space (Alt+/ in Simplified Chinese OS)
Quick Fix: Ctrl+1 (Quickly Generate Receiver Object)
Word Completion: Alt+/
Open External Java Document: Shift+F2
Display Search Dialog: Ctrl+H
Quick Outline: Ctrl+O
Open Resource: Ctrl+Shift+R
Open Type: Ctrl+Shift+T
Display Refactoring Menu: Alt+Shift+T
Previous/next cursor position: Alt+Left/Right
Previous/next member (member object or member function): Ctrl+Shift+Up/Down
Selected closed element: Alt+Shift+Up/Down/Left/Right
Delete line: Ctrl+D
Insert a line on the current line: Ctrl+Shift+Enter
Insert a line under the current line: Shift+Enter
Move the selected line up and down: Alt+Up/Down
Organize Imports: Ctrl+Shift+O