checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
    <!-- Adjustments: Moved LineLength outside TreeWalker -->
    <module name="LineLength">
        <property name="max" value="150"/>
    </module>

    <module name="FileLength">
        <property name="max" value="1000"/>
    </module>

    <module name="TreeWalker">
        <module name="UnusedImports"/>

        <!-- Naming Conventions -->
        <module name="TypeName">
            <property name="format" value="^[A-Z][a-zA-Z0-9]*$"/>
        </module>
        <module name="MethodName">
            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
        </module>
        <module name="ConstantName">
            <property name="format" value="^[A-Z][A-Z0-9]*(_[A-Z0-9]+)*$"/>
        </module>
        <module name="ParameterName">
            <property name="format" value="^[a-z][a-zA-Z0-9]*$"/>
        </module>

        <!-- Whitespace and formatting rules -->
        <module name="WhitespaceAround">
            <property name="allowEmptyTypes" value="true"/>
            <property name="allowEmptyMethods" value="true"/>
            <property name="allowEmptyConstructors" value="true"/>
            <property name="allowEmptyLoops" value="true"/>
            <property name="tokens"
                      value="BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN, COLON, DIV, DIV_ASSIGN, GE, GT, LAND, LE, LOR, LT, MINUS, MINUS_ASSIGN, MOD, MOD_ASSIGN, NOT_EQUAL, QUESTION, SL_ASSIGN, SR, SR_ASSIGN, STAR, STAR_ASSIGN"/>
        </module>


        <module name="NoLineWrap">
            <property name="tokens"
                      value="PACKAGE_DEF, IMPORT, STATIC_IMPORT, INTERFACE_DEF, ENUM_DEF"/>
        </module>

    </module>
</module>