checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
    "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
    "https://checkstyle.org/dtds/configuration_1_3.dtd">

<module name="Checker">
    <property name="charset" value="UTF-8"/>
    <property name="severity" value="error"/>

    <module name="TreeWalker">
        <!-- Prohibit use of System.out, System.err, and e.printStackTrace -->
        <module name="RegexpSinglelineJava">
            <property name="format" value="System\.(out|err)\.print|e\.printStackTrace"/>
            <property name="message" value="Do not use System.out/err, use com.intellij.openapi.diagnostic.Logger instead"/>
            <property name="ignoreComments" value="true"/>
        </module>
        <!-- Require ApplicationManager.getApplication().invokeLater instead of SwingUtilities.invokeLater for EDT operations -->
        <module name="RegexpSinglelineJava">
            <property name="format" value="SwingUtilities\.invokeLater"/>
            <property name="message" value="Use ApplicationManager.getApplication().invokeLater instead of SwingUtilities.invokeLater"/>
            <property name="ignoreComments" value="true"/>
        </module>
        <!-- Prohibit System.getProperty("user.home") - use PlatformUtils.getHomeDirectory() instead -->
        <module name="RegexpSinglelineJava">
            <property name="id" value="NoUserHomeProperty"/>
            <property name="format" value="System\.getProperty\(\s*&quot;user\.home&quot;"/>
            <property name="message" value="Do not use System.getProperty(&quot;user.home&quot;), use PlatformUtils.getHomeDirectory() instead (IDEA may override user.home)"/>
            <property name="ignoreComments" value="true"/>
        </module>
        <!-- Allow PlatformUtils.java to use System.getProperty("user.home") as fallback -->
        <module name="SuppressionXpathSingleFilter">
            <property name="id" value="NoUserHomeProperty"/>
            <property name="files" value="PlatformUtils\.java"/>
        </module>
    </module>
</module>