Master IntelliJ IDEA: Highlighting, Batch Replace, and Stream Debugging Tricks

Preface

This column mainly uses animated demonstrations of various IntelliJ IDEA operations, aiming for weekly updates. Some GIFs are long, so please watch them completely. If you find it impressive, leave a "666" in the comments.

Note: Due to WeChat public account limitations on GIF frame counts, the effect is poorer and a video is used; for the best viewing experience, watch in fullscreen.

String Highlighting and Regex Validation

Inject language or references into the text value of a String (ordinary or text block in Java 13) to enable value validation, syntax highlighting, and suggestions.

Batch Replace

Use Alt+J (or ⌃ G) to find and select all matching words or text blocks in the source file, then change or replace them simultaneously.

Fun Streams Debugging

Is debugging Java Streams fun for you? If not, use the debugger in IntelliJ IDEA to explore it—please watch the entire demonstration.

Streams Auto‑Completion Optimization

IntelliJ IDEA 2020.2 provides better auto‑completion for Stream API methods. You no longer need to type

stream()

before invoking stream operations; instead, type a collection method, and the IDE automatically inserts the

stream()

call.

Document Block Rendering

Use the documentation feature in the IDEA editor to make code demonstrations simple and engaging. Add titles, lists, or images to describe code, and render all of this within the editor.

To toggle the rendering view, use the gutter area or the shortcut Ctrl+Alt+Q (or ⌃⌥Q).

Conclusion

If you found this article helpful, please share it with more friends!