## com.puppycrawl.tools.checkstyle.checks.imports
Class AvoidStarImportCheck

    java.lang.Object
      com.puppycrawl.tools.checkstyle.api.AutomaticBean
          com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
              com.puppycrawl.tools.checkstyle.api.Check
                  com.puppycrawl.tools.checkstyle.checks.imports.AvoidStarImportCheck

All Implemented Interfaces:
  Configurable, Contextualizable

    public class AvoidStarImportCheck

extends Check

Check that finds import statements that use the * notation.

Rationale: Importing all classes from a package or static members from a class leads to tight coupling between packages or classes and might lead to problems when a new version of a library introduces name clashes.

An example of how to configure the check is:

     <module name="AvoidStarImport">
       <property name="excludes" value="java.io,java.net,java.lang.Math"/>
       <property name="allowClassImports" value="false"/>
       <property name="allowStaticMemberImports" value="false"/>
     </module>

The optional "excludes" property allows for certain packages like java.io or java.net to be exempted from the rule. It also is used to allow certain classes like java.lang.Math or java.io.File to be excluded in order to support static member imports. The optional "allowClassImports" when set to true, will allow starred class imports but will not affect static member imports. The optional "allowStaticMemberImports" when set to true will allow starred static member imports but will not affect class imports.

Version:
  2.0
Author:
  Oliver Burn, Bill Schneider, Travis Schneeberger

Constructor Summary
`AvoidStarImportCheck()`

Method Summary
`int[]` `getDefaultTokens()` Returns the default token a check is interested in.
`void` `setAllowClassImports(boolean aAllow)` Sets whether or not to allow all non-static class imports.
`void` `setAllowStaticMemberImports(boolean aAllow)` Sets whether or not to allow all static member imports.
`void` `setExcludes(String[] aExcludes)` Sets the list of packages or classes to be exempt from the check.
`void` `visitToken(DetailAST aAST)` Called to process a token.

Methods inherited from class com.puppycrawl.tools.checkstyle.api.Check
`beginTree, destroy, finishTree, getAcceptableTokens, getClassLoader, getFileContents, getLines, getRequiredTokens, getTabWidth, getTokenNames, init, leaveToken, log, log, setClassLoader, setFileContents, setMessages, setTabWidth, setTokens`

Methods inherited from class com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
`getCustomMessages, getId, getMessageBundle, getSeverity, getSeverityLevel, log, setId, setSeverity`

Methods inherited from class com.puppycrawl.tools.checkstyle.api.AutomaticBean
`configure, contextualize, finishLocalSetup, getConfiguration, setupChild`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### AvoidStarImportCheck

    public AvoidStarImportCheck()

Method Detail

### getDefaultTokens

    public int[] getDefaultTokens()

  Description copied from class: `Check`
  Returns the default token a check is interested in. Only used if the configuration for a check does not define the tokens.

  Specified by:
    `getDefaultTokens` in class `Check`
  Returns:
    the default tokens
  See Also:
    `TokenTypes`

### setExcludes

    public void setExcludes(String[] aExcludes)

  Sets the list of packages or classes to be exempt from the check. The excludes can contain a .* or not.

  Parameters:
    `aExcludes` - a list of package names/fully-qualifies class names where star imports are ok

### setAllowClassImports

    public void setAllowClassImports(boolean aAllow)

  Sets whether or not to allow all non-static class imports.

  Parameters:
    `aAllow` - true to allow false to disallow

### setAllowStaticMemberImports

    public void setAllowStaticMemberImports(boolean aAllow)

  Sets whether or not to allow all static member imports.

  Parameters:
    `aAllow` - true to allow false to disallow

### visitToken

    public void visitToken(DetailAST aAST)

  Description copied from class: `Check`
  Called to process a token.

  Overrides:
    `visitToken` in class `Check`
  Parameters:
    `aAST` - the token to process

Copyright © 2001-2011. All Rights Reserved.