Essential IntelliJ IDEA Tips to Boost Java Development Efficiency

1. View Code History

Right‑click a Java class and select Local History >> Show History to see recent changes and restore previous versions.

2. Adjust IDEA Virtual Memory

Use Change Memory Settings → Edit Custom VM Options to modify the .vmoptions file safely.

3. Eclipse Keymap

Set IDEA to use Eclipse shortcuts for a smoother transition from Eclipse.

4. Case‑Insensitive Suggestions

Disable case sensitivity in code completion so typing string still suggests String .

5. Disable Code Inspections

Turn off unnecessary inspections to reduce resource usage, keeping only those relevant to the project.

6. Documentation Template

Configure Javadoc templates for quick insertion of standard comments.

7. Show Method Separators

Enable visual separators to distinguish methods in dense codebases.

8. Multi‑Line Tabs

In Settings → Editor → General → Editor Tabs, increase the tab limit to display multiple tabs simultaneously.

9. Bracket Navigation

Use Ctrl+[ and Ctrl+] to jump to the start and end of a method’s braces.

10. Code Completion at End

Press Ctrl+Shift+Enter to auto‑complete statements and braces without moving the cursor.

11. Fuzzy Method Search

Press Ctrl+Shift+Alt+N and type a partial name like Peo.te to locate methods quickly.

12. Class Preview

Use Ctrl+Shift+I to preview a class without opening a new tab.

13. Find Callers

Press Ctrl+Alt+H to see where a method is invoked across the project.

14. Code Templates

Customize shortcuts such as converting sout to syso via the Postfix Completion settings.

15. Auto‑Import and Unused Imports

Use Alt+Enter to import missing classes and Ctrl+Alt+O to remove unused imports.

16. Codota Plugin

Install Codota to prioritize frequently used classes and methods in suggestions.

17. Quick Documentation

Press F2 to view Javadoc for a class or field instantly.

18. Rainbow Brackets

Enable the Rainbow Brackets plugin to color‑code matching parentheses.

19. Add Services in Microservice Projects

Use View → Tool Windows → Services → Add Services to manage multiple microservice modules in one window.

20. Global IDEA Settings

Adjust settings that apply to new windows, such as Maven configuration inheritance.

21. Mapper ↔ XML Navigation

Install the Free MyBatis plugin to jump between Java mapper files and their XML counterparts.

22. Background Image

Apply the BackgroundImage plugin to set a custom picture as the IDE background.

23. Maven Dependency Tree

Run mvn dependency:tree or click the Show Dependencies button to visualize JAR relationships.

24. Switch to Previous Tab

Use Alt + ← (or Alt + → ) to cycle through recently used tabs.

25. Built‑in SSH Tool

Configure host credentials and open an SSH session directly from IDEA.

26. Call‑Chain Diagram

Install the SequenceDiagram plugin to generate visual call‑chain diagrams for complex code.

27. Thread Dump

Click the camera icon during debugging to capture the current thread dump for analysis.

28. Run Multiple Instances on Different Ports

Add a custom VM option such as -Dserver.port=8993 to launch another instance on a different port.