Useful IntelliJ IDEA Tips and Shortcuts

Original article by "艾贺521" published on imooc.com; please credit the source when reproducing.

Preface

Before doing good work, one must have good tools; IntelliJ IDEA offers many powerful features worth exploring, and this article shares several handy tips discovered through repeated use.

Tip

Bookmark

When reading books or excellent source code, you need bookmarks. Later you can view all bookmarks and jump directly to the desired location. Shortcut: Fn + F3.

Optimize Imports

Most projects depend on many external libraries and packages. Over time, some imports become unused. Using the "Optimize Imports" feature removes unnecessary imports from the current file.

Insert Template

Templates allow you to quickly generate repetitive code by changing a small part. IntelliJ IDEA includes many built‑in live templates and also lets you create custom ones.

Navigate Files

You can navigate to any location in the project, such as a specific class file or the occurrence of the current symbol.

Exclude Index

Large projects may contain sub‑modules that are not needed. Marking such directories as "Exclude" prevents IntelliJ from indexing them, dramatically reducing project opening time.

Reformat Code

Use the reformatting feature to fix inconsistent indentation and other formatting issues.

Forward and Backward Navigation

In large projects you often jump between files. The forward/backward navigation actions let you return to the previous location instantly.

Various Plugins

Some plugins display all current shortcut keys, helping you learn and use them more efficiently.

Move Line Up / Down

When refactoring, you often need to move methods or lines up or down. The following shortcuts perform these actions.

Copy New Line: duplicate the current line and insert it below.

Conclusion

The article does not provide concrete examples, but encourages readers to try each feature themselves; all are practical and intended to help developers become more productive.