Step‑by‑Step Guide to Installing and Configuring the CheckStyle Plugin in IntelliJ IDEA

The author, a senior architect, introduces CheckStyle as a plugin for checking code style compliance, noting that it can use default rules (Sun, Google) or custom rule sets such as Alibaba's.

Most companies have their own coding standards, so they typically provide a checkstyle.xml file that can be imported to enforce those rules.

Installing the CheckStyle Plugin

1. Open File → Settings in IntelliJ IDEA and install the CheckStyle plugin.

You can also download Alibaba’s rule set if you prefer.

Configuring the Plugin

Running CheckStyle

Select the class you want to check, right‑click and choose CheckStyle. The author notes that the Alibaba rule set may occupy the default shortcut, but the functionality remains the same.

Alternatively, use the menu option shown in the following screenshot.

Common CheckStyle Issues and Fixes

1. Annotation Problems – Missing annotations are highlighted; simply add the required annotations.

Incomplete annotation values must be completed.

Every @ attribute should be fully specified.

2. Whitespace / Character Placement – Adjust the code style settings to match your preferences.

After setting the style, right‑click the desired option to apply.

Tab settings (default 4 spaces) can be adjusted similarly.

3. Naming Conventions – Follow the naming rules shown in the screenshot.

Delete or rename offending identifiers as needed.

4. Formatting Issues – Be cautious when changing public classes; minimal changes are recommended.

5. Logical Errors – Review the highlighted logical problems and correct them.

6. Import Order – Use IDE shortcuts (e.g., Ctrl+Shift+O in Eclipse or the equivalent in IntelliJ) to organize imports automatically.

Additional Notes

The author encourages readers to discuss and share viewpoints, and includes several promotional sections for ChatGPT services, a private consulting group, and a paid community offering AI‑related resources.

Links to related articles, open‑source projects, and interview materials are also provided at the end of the page.