Shortcut keys commonly used in idea

1. Quickly generate main Method ：psvm+Tab or main+Tab

2. Quickly generate System.out.println():sout+Tab

3. Delete a line ：Ctrl+Y

4. Switch java file （ The premise is that the project has multiple .java file ）

：Alt+ Right arrow or Alt+ left arrow

5. Copy the selected line to the next line ：Ctrl+D

6. Undo the last action ：Ctrl+Z

7. Cancel cancellation ：Ctrl+shift+Z

8. Merge the selected rows into one row ：Ctrl+shift+J

9. Find class files ：Ctrl+N

10. Displays the file structure ：Ctrl+F12

11. Displays the current folder path ：Ctrl+Alt+F12

12. Shows the inheritance level of the current class ：Ctrl+H

13. Go to the next error ：F2

14. Navigate to the previous error ：shift+F2

15. Expand code ：Ctrl+=

16. Collapse code ：Ctrl+-

17. Select all ：Ctrl+A

18. Copy ：Ctrl+C

19. shear ：Ctrl+X

20. Paste ：Ctrl+V

21. Navigate to a line in the file ：Ctrl+G

22. The selected line is a multiline comment ：Ctrl+shift+/

23. Comment or uncomment the selected line ：Ctrl+/

24. Run the current file ：Ctrl+shift+F10

25. The parameters of the prompt method ：Ctrl+P

26. Jump to the end of the file ：Ctrl+End

27. Jump to the header ：Ctrl+Home

28. The selected line of code is formatted ：Ctrl+Alt+L

29. Text search in the current file ：Ctrl+R

30. The selected line breaks or cancels the breakpoint ：Ctrl+F8