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">
    <module name="LineLength">
        <property name="fileExtensions" value="java"/>
        <property name="max" value="120"/>
        <property name="ignorePattern" value="http://|https://"/>
    </module>

    <module name="TreeWalker">
        <module name="LeftCurly">
            <property name="option" value="nl"/>
            <property name="tokens" value="LITERAL_CATCH"/>
            <property name="tokens" value="LITERAL_ELSE"/>
            <property name="tokens" value="LITERAL_FINALLY"/>
            <property name="tokens" value="LITERAL_IF"/>
            <property name="tokens" value="LITERAL_TRY"/>
            <property name="tokens" value="METHOD_DEF"/>
            <property name="tokens" value="CLASS_DEF"/>
        </module>

        <!-- Skips empty blocks {}, to not skip them: value="alone" -->
        <module name="RightCurly">
            <property name="option" value="alone_or_singleline"/>
        </module>
        <module name="LeftCurly">
            <property name="option" value="nl"/>
        </module>

        <module name="WhitespaceAfter">
            <!-- Drops TYPECAST from default tokens -->
            <property name="tokens" value="COMMA , SEMI , LITERAL_IF , LITERAL_ELSE , LITERAL_WHILE , LITERAL_DO , LITERAL_FOR , DO_WHILE"/>
        </module>
    </module>

    <module name="FileTabCharacter">
        <property name="eachLine" value="true"/>
    </module>
</module>