checkstyle.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">
	<module name="SuppressionFilter">
		<property name="file" value="${basedir}/checkstyle-suppressions.xml" />
	</module>

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

	<!-- 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="fileExtensions" value="java"/>
		<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">
		<property name="fileExtensions" value="java"/>
	</module>

	<!-- 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">
		<module name="SuppressionCommentFilter">
			<property name="offCommentFormat" value="CHECKSTYLE_OFF\: ([\w\|]+)"/>
			<property name="onCommentFormat" value="CHECKSTYLE_ON\: ([\w\|]+)"/>
			<property name="checkFormat" value="$1"/>
		</module>

		<property name="tabWidth" value="4" />

		<!-- Checks for Javadoc comments. -->
		<!-- See http://checkstyle.sf.net/config_javadoc.html -->
		<module name="JavadocMethod">
			<property name="accessModifiers" value="public" />
			<property name="allowMissingParamTags" value="true" />
			<property name="allowMissingReturnTag" value="true" />
		</module>
		<module name="JavadocType" />
		<module name="JavadocVariable">
			<property name="scope" value="public" />
		</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" />
		<module name="MethodName" />
		<module name="PackageName" />
		<module name="ParameterName">
			<property name="format" value="[a-z][a-zA-Z0-9]*[_]?" /> <!-- for the 'default_' params -->
		</module>
		<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" />

		<!-- Waiting until http://sourceforge.net/tracker/?func=detail&atid=397078&aid=652303&group_id=29721 
			makes it into the latest. <module name="UnusedImports"/> -->

		<!-- Checks for Size Violations. -->
		<!-- See http://checkstyle.sf.net/config_sizes.html -->
		<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">
			<property name="tokens" value="COMMA, SEMI" />
		</module>
		<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" />
		<module name="EmptyBlock" />
		<module name="LeftCurly" />
		<!-- <module name="NeedBraces" /> -->
		<module name="RightCurly" />


		<!-- Checks for common coding problems -->
		<!-- See http://checkstyle.sf.net/config_coding.html -->
		<!-- <module name="AvoidInlineConditionals" /> -->
		<module name="EmptyStatement" />
		<module name="EqualsHashCode" />
		<module name="HiddenField">
			<property name="ignoreSetter" value="true" />
			<property name="ignoreConstructorParameter" value="true" />
		</module>
		<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">
			<property name="protectedAllowed" value="true" />
		</module>


		<!-- 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>