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="FileLength"/>
    <module name="FileTabCharacter"/>

    <!-- Trailing spaces -->
    <module name="RegexpSingleline">
        <property name="format" value="\s+$"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>

    <!-- Space after 'for' and 'if' -->
    <module name="RegexpSingleline">
        <property name="format" value="^\s*(for|if)\b[^ ]"/>
        <property name="message" value="Space needed before opening parenthesis."/>
    </module>

    <!-- For each spacing -->
    <module name="RegexpSingleline">
        <property name="format" value="^\s*for \(.*?([^ ]:|:[^ ])"/>
        <property name="message" value="Space needed around ':' character."/>
    </module>

    <module name="TreeWalker">

        <!-- Checks for Annotation Location                               -->
        <!-- See http://checkstyle.sourceforge.net/config_annotation.html -->
        <module name="AnnotationLocation">
            <property name="allowSamelineMultipleAnnotations" value="false"/>
            <property name="allowSamelineSingleParameterlessAnnotation" value="false"/>
            <property name="allowSamelineParameterizedAnnotation" value="false"/>
        </module>

        <!-- Checks for Naming Conventions.                           -->
        <!-- See http://checkstyle.sourceforge.net/config_naming.html -->
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>
        <module name="MethodName">
            <property name="format" value="^[a-z][a-zA-Z0-9_]*$"/>
        </module>
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName">
            <property name="format" value="^[A-Z][a-zA-Z0-9_]*$"/>
        </module>


        <!-- Checks for imports                                        -->
        <!-- See http://checkstyle.sourceforge.net/config_imports.html -->
        <module name="AvoidStarImport"/>
        <module name="IllegalImport"/>
        <module name="RedundantImport"/>
        <module name="UnusedImports">
            <property name="processJavadoc" value="true"/>
        </module>


        <!-- Checks for Size Violations.                             -->
        <!-- See http://checkstyle.sourceforge.net/config_sizes.html -->
        <module name="LineLength">
            <property name="max" value="200"/>
        </module>
        <module name="ParameterNumber"/>


        <!-- Checks for whitespace                                        -->
        <!-- See http://checkstyle.sourceforge.net/config_whitespace.html -->
        <module name="GenericWhitespace"/>
        <module name="EmptyForIteratorPad"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter"/>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>


        <!-- Modifier Checks                                            -->
        <!-- See http://checkstyle.sourceforge.net/config_modifier.html -->
        <module name="RedundantModifier"/>


        <!-- Checks for blocks.                                       -->
        <!-- See http://checkstyle.sourceforge.net/config_blocks.html -->
        <module name="AvoidNestedBlocks"/>
        <module name="LeftCurly"/>
        <module name="NeedBraces"/>
        <module name="RightCurly"/>


        <!-- Checks for common coding problems                        -->
        <!-- See http://checkstyle.sourceforge.net/config_coding.html -->
        <module name="CovariantEquals"/>
        <module name="EmptyStatement"/>
        <module name="EqualsAvoidNull"/>
        <module name="EqualsHashCode"/>
        <module name="IllegalInstantiation"/>
        <module name="InnerAssignment"/>
        <module name="MissingSwitchDefault"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>

        <!-- Checks for class design                                  -->
        <!-- See http://checkstyle.sourceforge.net/config_design.html -->
        <module name="InterfaceIsType"/>


        <!-- Miscellaneous other checks.                            -->
        <!-- See http://checkstyle.sourceforge.net/config_misc.html -->
        <module name="ArrayTypeStyle"/>
        <module name="TodoComment"/>
        <module name="UpperEll"/>
    </module>
</module>