IntelliJ IDEA Configuration and Shortcut Guide

1. Set Maven : Open File → Settings → Search "Maven" , then configure the Maven home directory, user settings file, and local repository paths.

2. IDEA code‑line width : Navigate to File → Settings → Editor → Code Style and enable "Wrap when typing reaches right margin" or the "Ensure right margin is not exceeded" option to automatically wrap long lines.

3. Case‑insensitive completion : Go to File → Settings → Editor → Code Completion and set "Case sensitive completion" to NONE .

4. Force Maven dependency refresh : Delete libraries in Project Settings, clean the Maven project, then right‑click the project → Maven → Reimport.

5. IDEA environment default location : The default configuration resides in C:\Users\ username \.IntelliJIdea14 ; you can back it up or change the path via %IDEA_HOME%/bin/idea.properties .

6. Hide unwanted files/folders : Open File → Settings → Search "File Type" and add patterns (e.g., *.iml , .idea ) to the ignore list.

7. Switch to Eclipse keymap : Change the keymap under File → Settings → Keymap to the Eclipse preset.

8. Modify default settings : Adjust various default IDE settings as needed (details omitted for brevity).

9. Change smart‑completion shortcut : Set File → Settings → Keymap → Main menu → Code → Completion → Basic to Ctrl+Alt+Enter and adjust related shortcuts.

10. Resolve shortcut conflicts : Reassign Find... and Replace... to Ctrl+F and Ctrl+R respectively.

11. Show line numbers : Enable File → Settings → Editor → General → Appearance → Show line numbers .

12. Ignore case in code completion : Set Case sensitive completion to None in the Code Completion settings.

13. Mark modified tabs with an asterisk : Enable Editor → General → Editor Tabs → Mark modified tabs with asterisk .

14. Disable automatic code suggestions : Uncheck Preferences → IDE Settings → Editor → Code Completion → Autopopup documentation in (ms) .

15. Common shortcuts : Examples include Ctrl+Tab (switch tabs), Ctrl+W (expand selection), Alt+Insert (generate code), Ctrl+Shift+Space (smart completion), Alt+Enter (quick‑fix), Ctrl+Shift+Alt+T (refactor), etc.

16. SVN synchronization issue : Enable the command‑line client in File → Settings → Subversion → General and point to the svn.exe executable (avoid spaces in the path).

17. Ignore *.iml files in SVN : Add *.iml and .idea (with a trailing semicolon) to Ignore files and folders under Editor → File Types .

18. Change editor font size : Adjust via File → Settings → Editor → Colors & Fonts → Font → Size .

19. IDEA encoding settings : Set IDE, project, and properties file encodings, and enable transparent native‑to‑ASCII conversion under File → Settings → File Encodings .

20. Live Templates : Use shortcuts like "abc".sout → System.out.println("abc") or list.for → for (String s : list) {} .

21. Configure Tomcat VM options : Add -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m to the VM options.

22. Install plugins : Install via the marketplace (online) or download the ZIP and use File → Settings → Plugins → Install plugin from disk... .

23. Adjust IDEA memory parameters : Edit %IDEA_HOME%/bin/idea.exe.vmoptions to change heap sizes.

24. Import Eclipse web project to Tomcat : Add web facet and configure artifacts for deployment.

25. Reduce CPU usage when opening JSP/Java files : Disable inspections via File → Settings → Editor → Inspection .

26. Add Spring/Struts support : Use Project Settings → Modules → Add to include related files.

27. Enable automatic compilation on class change : Enable Make project automatically under File → Settings → Build, Execution, Deployment → Compiler .

28. Generate serialVersionUID : Enable the inspection for serialization issues and press Alt+Enter on a class to create the field.

29. Presentation mode : Activate via Alt+V → View → Enter Presentation Mode for distraction‑free coding; exit the same way.

30. Inject Language for JSON strings : Place the cursor inside quotes, press Alt+Enter , select Inject language or reference → JSON , and edit the JSON fragment with proper escaping.

31. Powerful Symbol search : Press Ctrl+Shift+Alt+N to locate symbols (methods, classes) by partial name.

32. Resolve shortcut conflicts with Windows : Disable conflicting system shortcuts via the desktop graphics options.