Master IntelliJ IDEA: Highlighting, Batch Replace, and Advanced Streams Debugging

Preface

This column mainly uses animated demonstrations of some operations in IntelliJ IDEA, aiming for weekly updates. Some GIFs are long, so please watch them completely. If you think it’s impressive, leave a “666” in the comments.

Note: Due to WeChat public account limits on GIF frames, the effect is poorer, so videos are used; for best viewing, please watch in full screen.

String Highlighting and Regex Validation

Inject language or references into the text value of a String (regular 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 a 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 demonstration carefully.

Streams Auto‑Completion Optimization

IntelliJ IDEA 2020.2 provides better auto‑completion for Stream API methods. You no longer need to type stream() before accessing stream operations; instead, type a collection method and the IDE will automatically insert stream() for you.

Document Block Rendering

Use the documentation blocks in the IDEA editor to make code demonstrations simple and engaging. Add headings, 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

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