checkstyle.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC
    "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
    "http://www.puppycrawl.com/dtds/configuration_1_3.dtd">

<!-- This is a checkstyle configuration file. For descriptions of
what the following rules do, please see the checkstyle configuration
page at http://checkstyle.sourceforge.net/config.html -->

<module name="Checker">
  <property name="charset" value="UTF-8"/>
  <property name="fileExtensions" value="java"/>

  <!-- See http://checkstyle.sf.net/config_sizes.html   default : 2000-->
  <module name="FileLength"/>

  <module name="TreeWalker">

    <!-- 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">
      <property name="processJavadoc" value="true"/>
    </module>

    <!-- Checks for Size Violations.                    -->
    <!-- See http://checkstyle.sf.net/config_sizes.html -->
    <module name="MethodLength">
      <property name="max" value="200"/>
    </module>
    <module name="ParameterNumber">
      <property name="max" value="20"/>
    </module>

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

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

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

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

</module>