checkstyle.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">

<module name="Checker">

    <module name="TreeWalker">
        <module name="BooleanExpressionComplexity">
            <property name="max" value="10"/>
        </module>
        <module name="CyclomaticComplexity">
            <property name="max" value="20"/>
        </module>
        <module name="MethodLength">
            <property name="tokens" value="METHOD_DEF"/>
            <property name="max" value="60"/>
            <property name="countEmpty" value="false"/>
        </module>
        <module name="EmptyCatchBlock">
            <property name="exceptionVariableName" value="expected|ignore"/>
        </module>
        <module name="AvoidStarImport">
            <property name="excludes" value="java.io,java.net,java.lang.Math"/>
        </module>
        <module name="IllegalImport">
            <property name="illegalPkgs" value="java.io, java.sql"/>
        </module>
        <module name="NeedBraces">
            <property name="allowSingleLineStatement" value="true"/>
        </module>
    </module>

    <module name="Header">
        <property name="headerFile" value="header.txt"/>
        <property name="fileExtensions" value="java"/>
    </module>

    <module name="LineLength"/>
    <module name="FileLength">
        <property name="max" value="150"/>
    </module>
    <module name="FileTabCharacter"/>
</module>