check-style.xml

<?xml version="1.0" encoding="UTF-8"?>

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

<module name="Checker">
    <!-- Long source files become very hard to understand. Make sure files don't exceed the maximum number of lines. -->
    <module name="FileLength">
        <property name="max" value="1500"/>
        <property name="fileExtensions" value="java"/>
    </module>


    <module name="TreeWalker">
        <module name="SuppressionCommentFilter"/>
        <!--module name="RegexpSinglelineJava">
            <property name="format" value="^\t* "/>
            <property name="message" value="Indent must use tab characters"/>
            <property name="ignoreComments" value="true"/>
        </module-->

        <!-- Long lines are hard to read. Make sure lines don't exceed the maximum line length. -->
        <module name="LineLength">
            <property name="max" value="180"/>
        </module>

        <!-- Avoid trailing spaces at the end of a line. -->
        <module name="RegexpSinglelineJava">
            <!-- \s matches whitespace character, $ matches end of line. -->
            <property name="format" value="\s+$"/>
            <property name="ignoreComments" value="true"/>
            <property name="message" value="Line has trailing spaces at the end"/>
        </module>

        <!-- Limit the amount of parameters for one method. -->
        <module name="ParameterNumber">
            <property name="max" value="8"/>
        </module>

        <!-- Avoid redundant or unused imports. -->
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>

        <!-- Don't allow to import sun.* packages. -->
        <module name="IllegalImport">
            <property name="illegalClasses" value="org.jetbrains.annotations.NotNull"/>
        </module>

        <!-- Classes that override equals also override hashCode. -->
        <module name="EqualsHashCode"/>

        <!-- Checks for overly complicated boolean return statements or expressions. -->
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>

        <!-- Checks that string literals are not used with == or !=. -->
        <module name="StringLiteralEquality"/>

        <!-- Avoid excessive nesting. -->
        <module name="NestedForDepth"/>
        <module name="NestedIfDepth">
            <property name="max" value="2"/>
        </module>
        <module name="NestedTryDepth"/>

        <!-- Checks there is only one statement per line. The following line will be flagged as an error. -->
        <module name="OneStatementPerLine"/>

        <!-- Detects empty statements. -->
        <module name="EmptyStatement"/>

        <!-- Checks for illegal instantiations where a factory method is preferred. E.g. new Boolean(...). -->
        <module name="IllegalInstantiation"/>

        <!-- Checks that the parts of a class or interface declaration appear in the order suggested by the Code
        Conventions for the Java Programming Language. -->
        <!--module name="DeclarationOrder" /-->
    </module>
</module>