Language Support for Java(TM) by Red Hat also provides formatting settings. You can export an Eclipse formatter file and then use it for your project in VS Code.
In addition, there are also the Checkstyle for Java and SonarLint extensions, which provide features for live linting and code analysis.
With the Checkstyle for Java extension, you can use either existing checkstyle configurations (Google's or Sun's Check) or your own customized files for your project. When editing a Java file, the extension will check the file format and provide Quick Fixes if possible on the fly.
Set Checkstyle configuration file.
The Checkstyle for Java extension supports live linting.
And batch check.
The Problems panel will open when you click the Checkstyle status icon in the Status bar.
Set Checkstyle configuration file
To set the configuration file, right-click the .xml file and select Set the Checkstyle Configuration File.
You can also trigger the command Checkstyle: Set Checkstyle Configuration File to choose the configuration file in the File Explorer. The extension looks for a checkstyle.xml file in your workspace to make Checkstyle configuration easier. You will also see the two built-in configurations:
Command Checkstyle: Set the Checkstyle Configuration detects potential Checkstyle configuration files and lists them. You can also provide a configuration file by directly writing a URL in the input box.
You can also set the Checkstyle version by using the command Checkstyle: Set the Checkstyle Version.
The command will:
In addition, you can also bring any 3rd-party modules for Checkstyle by configuring its path. For example, after using the configuration below, you can add <module name="SingleBreakOrContinueCheck"/> or <module name="com.github.sevntu.checkstyle.checks.naming.SingleBreakOrContinueCheck"/> to checkstyle.xml to leverage those checks.
"java.checkstyle.modules": [ "${workspaceFolder}/src/main/resources/sevntu-checks-1.35.0.jar" ]Check the style and fix the violations
For more details about Checkstyle for Java, visit its GitHub Repository.
The SonarLint extension lets you detect bugs and vulnerabilities as you write code in VS Code. Java is one of the languages supported, and the extension will run in the background and highlight source code that poses a quality or security concern.
Code Analysis on the fly
Issues are highlighted directly in the editor with hovers to provide detailed explanations.
Issues found in the opened file can also be reviewed through the Problems panel of VS Code. When applicable, secondary code locations are mentioned so you can understand where the issue originates from (for example, the code path that led to a bug).
Rule documentation and remediation guidance
For any issue detected, SonarLint provides full documentation about the rule that was violated, and the coding best practice it relates to. This lets you understand why an issue is raised, and most importantly how to best fix it.
Enabling more quality and security rules
By default, SonarLint provides a wide array of rules to detect bugs and vulnerabilities. More checks can be enabled through the SonarLint Rules view.
For more details about the SonarLint for VS Code extension, visit the SonarLint website.