com.puppycrawl.tools.checkstyle.checks.coding
Class StringLiteralEqualityCheck

java.lang.Object
  extended bycom.puppycrawl.tools.checkstyle.api.AutomaticBean
      extended bycom.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
          extended bycom.puppycrawl.tools.checkstyle.api.Check
              extended bycom.puppycrawl.tools.checkstyle.checks.coding.StringLiteralEqualityCheck
All Implemented Interfaces:
Configurable, Contextualizable

public class StringLiteralEqualityCheck
extends Check

Checks that string literals are not used with == or !=.

Rationale: Novice Java programmers often use code like if (x == "something") when they mean if ("something".equals(x)).

Author:
Lars Kühne

Constructor Summary
StringLiteralEqualityCheck()
           
 
Method Summary
 int[] getDefaultTokens()
          Returns the default token a check is interested in.
 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
getMessageBundle, getSeverity, getSeverityLevel, log, log, log, log, log, log, log, log, log, 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

StringLiteralEqualityCheck

public StringLiteralEqualityCheck()
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:
Check.getDefaultTokens()

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
See Also:
Check.visitToken(com.puppycrawl.tools.checkstyle.api.DetailAST)

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