IntelliJ IDEA Tips and Configuration Guide: Maven Setup, Code Style, Shortcuts, Plugins, and More

This article provides a detailed collection of IntelliJ IDEA settings and shortcuts aimed at improving Java development efficiency.

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

2. Code line width : Navigate to File → Settings → Editor → Code Style, enable "Wrap when typing reaches right margin" and ensure "Right margin (columns)" is set to the desired width.

3. Case‑insensitive completion : In File → Settings → Editor → Code Completion set "Case sensitive completion" to NONE to ignore case when suggesting completions.

4. Force Maven dependency refresh : Use Project Settings → Libraries to clear libraries, then Maven Projects → Clean and Right‑click → Maven → Reimport to reload dependencies.

5. IDEA configuration directory : Default location is C:\Users\<em>username</em>\.IntelliJIdea14; you can back up this folder or change its path via %IDEA_HOME%/bin/idea.properties.

6. Hide unwanted files/folders : Add patterns like *.iml or .idea in File Types → Ignore files and folders to keep the project view clean.

7. Common shortcuts (selected): Ctrl+Tab (switch tabs), Ctrl+W (extend selection), Alt+Insert (new class/method), Ctrl+Shift+Enter (auto‑complete), Ctrl+Alt+L (reformat code), Alt+Shift+F10 (run), F7/F8/F9 (debug steps), Ctrl+Shift+V (paste from history), etc.

8. SVN synchronization fix : Enable "Use command line client" in Settings → Subversion → General and point to D:\tools\TortoiseSVN\bin\svn.exe, ensuring the path contains no spaces.

9. Plugin installation : Use the marketplace (File → Settings → Plugins → Browse Repositories) or install from disk by downloading the zip (e.g., FindBugs-IDEA-0.9.994.zip) and selecting Install plugin from disk....

10. JVM memory options : Set VM options such as -Xms256m -Xmx512m -XX:PermSize=128m -XX:MaxPermSize=256m in the Run/Debug configuration.

11. JSON injection language : Place the cursor inside a string, press Alt+Enter, choose "Inject language or reference", select JSON, and edit the JSON fragment directly; exit with Ctrl+F4.

12. Presentation mode : Activate via Alt+V → Enter Presentation Mode to focus on a single file; exit with Alt+V → Exit Presentation Mode. Use Ctrl+E, Ctrl+N, or Ctrl+Shift+N to navigate while in this mode.

13. Symbol search : Press Ctrl+Shift+Alt+N to locate symbols or methods by partial names.

14. Formatting comment issue : Disable "Enable Javadoc formatting" to prevent comments from being reformatted unintentionally.