style_checks.xml

<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
        "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
        "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<!--

  Checkstyle configuration that checks the sun coding conventions from:

    - the Java Language Specification at
      http://java.sun.com/docs/books/jls/second_edition/html/index.html

    - the Sun Code Conventions at http://java.sun.com/docs/codeconv/

    - the Javadoc guidelines at
      http://java.sun.com/j2se/javadoc/writingdoccomments/index.html

    - the JDK Api documentation http://java.sun.com/j2se/docs/api/index.html

    - some best practices

  Checkstyle is very configurable. Be sure to read the documentation at
  http://checkstyle.sf.net (or in your downloaded distribution).

  Most Checks are configurable, be sure to consult the documentation.

  To completely disable a check, just comment it out or delete it from the file.

  Finally, it is worth reading the documentation.

-->

<module name="Checker">
    <!--
        If you set the basedir property below, then all reported file
        names will be relative to the specified directory. See
        http://checkstyle.sourceforge.net/5.x/config.html#Checker

        <property name="basedir" value="${basedir}"/>
    -->

    <!-- Checks that a package-info.java file exists for each package.   -->
    <!-- See http://checkstyle.sf.net/config_javadoc.html#JavadocPackage -->
    <!-- <module name="JavadocPackage"/> -->

    <!-- Checks whether files end with a new line.                        -->
    <!-- See http://checkstyle.sf.net/config_misc.html#NewlineAtEndOfFile -->
	<module name="NewlineAtEndOfFile"><property name="lineSeparator" value="lf"/></module>

    <!-- Checks that property files contain the same keys.         -->
    <!-- See http://checkstyle.sf.net/config_misc.html#Translation -->
    <module name="Translation"/>

    <!-- Checks for Size Violations.                    -->
    <!-- See http://checkstyle.sf.net/config_sizes.html -->
    <!--  <module name="FileLength"/> -->

    <!-- Checks for whitespace                               -->
    <!-- See http://checkstyle.sf.net/config_whitespace.html -->
    <module name="FileTabCharacter"/>

    <!-- Miscellaneous other checks.                   -->
    <!-- See http://checkstyle.sf.net/config_misc.html -->
    <module name="RegexpSingleline">
        <property name="format" value="(^|[^\*])\s+$"/>
        <property name="minimum" value="0"/>
        <property name="maximum" value="0"/>
        <property name="message" value="Line has trailing spaces."/>
    </module>

    <module name="TreeWalker">
        <property name="cacheFile" value="${cacheFile}"/>
        <!-- Checks for Javadoc comments.                     -->
        <!-- See http://checkstyle.sf.net/config_javadoc.html -->
        <module name="JavadocMethod">
            <property name="scope" value="package"/>
        </module>
        <module name="JavadocType">
            <property name="scope" value="package"/>
        </module>
        <module name="JavadocVariable">
            <property name="scope" value="package"/>
        </module>
        <module name="JavadocStyle"/>


        <!-- Checks for Naming Conventions.                  -->
        <!-- See http://checkstyle.sf.net/config_naming.html -->
        <module name="ConstantName"/>
        <module name="LocalFinalVariableName"/>
        <module name="LocalVariableName"/>
        <module name="MemberName"/>

		<!-- Allow test_ methods to have underscores in them. -->
        <module name="MethodName">
          <property name="format" value="^[a-z][a-zA-Z0-9]*$|^test_[_a-zA-Z0-9]*$"/>
        </module>
        
        <module name="PackageName"/>
        <module name="ParameterName"/>
        <module name="StaticVariableName"/>
        <module name="TypeName"/>


        <!-- Checks for Headers                                -->
        <!-- See http://checkstyle.sf.net/config_header.html   -->
        <!-- <module name="Header">                            -->
        <!-- The follow property value demonstrates the ability     -->
        <!-- to have access to ANT properties. In this case it uses -->
        <!-- the ${basedir} property to allow Checkstyle to be run  -->
        <!-- from any directory within a project. See property      -->
        <!-- expansion,                                             -->
        <!-- http://checkstyle.sf.net/config.html#properties        -->
        <!-- <property                                              -->
        <!--     name="headerFile"                                  -->
        <!--     value="${basedir}/java.header"/>                   -->
        <!-- </module> -->

        <!-- Following interprets the header file as regular expressions. -->
        <!-- <module name="RegexpHeader"/>                                -->


        <!-- Checks for imports                              -->
        <!-- See http://checkstyle.sf.net/config_import.html -->
        <module name="AvoidStarImport"/>
        <module name="IllegalImport"/>
        <!-- defaults to sun.* packages -->
        <module name="RedundantImport"/>
        <module name="UnusedImports"/>


        <!-- Checks for Size Violations.                    -->
        <!-- See http://checkstyle.sf.net/config_sizes.html -->
        <!-- <module name="LineLength">
            <property name="max" value="180"/>
        </module>
        <module name="MethodLength"/>
        <module name="ParameterNumber"/> -->


        <!-- Checks for whitespace                               -->
        <!-- See http://checkstyle.sf.net/config_whitespace.html -->
        <module name="EmptyForIteratorPad"/>
        <module name="GenericWhitespace"/>
        <module name="MethodParamPad"/>
        <module name="NoWhitespaceAfter">
         <property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS"/>
        </module>
        <module name="NoWhitespaceBefore"/>
        <module name="OperatorWrap"/>
        <module name="ParenPad"/>
        <module name="TypecastParenPad"/>
        <module name="WhitespaceAfter"/>
        <module name="WhitespaceAround"/>


        <!-- Modifier Checks                                    -->
        <!-- See http://checkstyle.sf.net/config_modifiers.html -->
        <module name="ModifierOrder"/>
        <module name="RedundantModifier"/>


        <!-- Checks for blocks. You know, those {}'s         -->
        <!-- See http://checkstyle.sf.net/config_blocks.html -->
        <module name="AvoidNestedBlocks"/>

        <!-- Allow empty blocks. <module name="EmptyBlock"/> -->

        <module name="LeftCurly">
          <!-- Place left curly at EOL for one-line clauses, 
               and on next line for multi-line clauses. 
          -->
          <!--   <property name="option" value="nlow" /> -->
        </module>
         
        <module name="NeedBraces"/>
        
        <!-- Allow for right curly to appear on same or next line. <module name="RightCurly"/> -->


        <!-- Checks for common coding problems               -->
        <!-- See http://checkstyle.sf.net/config_coding.html -->
        <!-- <module name="AvoidInlineConditionals"/> -->
        <module name="DoubleCheckedLocking"/>
        <!-- MY FAVOURITE -->
        <module name="EmptyStatement"/>
        <module name="EqualsHashCode"/>
        <!-- <module name="HiddenField"/> -->
        <module name="IllegalInstantiation"/>
        <module name="InnerAssignment"/>
        <!-- <module name="MagicNumber"/> -->
        <module name="MissingSwitchDefault"/>
        <module name="RedundantThrows"/>
        <module name="SimplifyBooleanExpression"/>
        <module name="SimplifyBooleanReturn"/>

        <!-- Checks for class design                         -->
        <!-- See http://checkstyle.sf.net/config_design.html -->
        <!-- <module name="DesignForExtension"/> -->
        <module name="FinalClass"/>
        <!--  <module name="HideUtilityClassConstructor"/> -->
        <module name="InterfaceIsType"/>
        <module name="VisibilityModifier"/>


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

    </module>

</module>