Class UnnecessarySemicolonInTryWithResourcesCheck

java.lang.Object
com.puppycrawl.tools.checkstyle.api.AutomaticBean
com.puppycrawl.tools.checkstyle.api.AbstractViolationReporter
com.puppycrawl.tools.checkstyle.api.AbstractCheck
com.puppycrawl.tools.checkstyle.checks.coding.UnnecessarySemicolonInTryWithResourcesCheck
All Implemented Interfaces:
Configurable, Contextualizable
public final class UnnecessarySemicolonInTryWithResourcesCheck extends AbstractCheck

Checks if unnecessary semicolon is used in last resource declaration.

  • Property allowWhenNoBraceAfterSemicolon - Allow unnecessary semicolon if closing paren is not on the same line. Type is boolean. Default value is true.

To configure the check: 

<module name="UnnecessarySemicolonInTryWithResources"/>

Example of violations 

class A {
    void method() throws IOException {
        try(Reader r1 = new PipedReader();){} // violation
        try(Reader r4 = new PipedReader();Reader r5 = new PipedReader()
        ;){} // violation
        try(Reader r6 = new PipedReader();
            Reader r7
                   = new PipedReader();
        ){}
    }
}

To configure the check to detect unnecessary semicolon if closing paren is not on same line 

<module name="UnnecessarySemicolonInTryWithResources">
  <property name="allowWhenNoBraceAfterSemicolon" value="false"/>
</module>

Example of exclusion 

class A {
    void method() throws IOException {
        try(Reader r1 = new PipedReader();){} // violation
        try(Reader r6 = new PipedReader();
            Reader r7 = new PipedReader(); // violation
        ){}
    }
}

Parent is com.puppycrawl.tools.checkstyle.TreeWalker

Violation Message Keys:

  • unnecessary.semicolon
Since:
8.22

  • Field Details

    • MSG_SEMI

      public static final String MSG_SEMI
      A key is pointing to the warning message text in "messages.properties" file.
      See Also:

    • allowWhenNoBraceAfterSemicolon

      private boolean allowWhenNoBraceAfterSemicolon
      Allow unnecessary semicolon if closing paren is not on the same line.

  • Constructor Details

    • UnnecessarySemicolonInTryWithResourcesCheck

      public UnnecessarySemicolonInTryWithResourcesCheck()

  • Method Details

    • getDefaultTokens

      public int[] getDefaultTokens()
      Description copied from class: AbstractCheck
      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 AbstractCheck
      Returns:
      the default tokens
      See Also:

    • getAcceptableTokens

      public int[] getAcceptableTokens()
      Description copied from class: AbstractCheck
      The configurable token set. Used to protect Checks against malicious users who specify an unacceptable token set in the configuration file. The default implementation returns the check's default tokens.
      Specified by:
      getAcceptableTokens in class AbstractCheck
      Returns:
      the token set this check is designed for.
      See Also:

    • getRequiredTokens

      public int[] getRequiredTokens()
      Description copied from class: AbstractCheck
      The tokens that this check must be registered for.
      Specified by:
      getRequiredTokens in class AbstractCheck
      Returns:
      the token set this must be registered for.
      See Also:

    • setAllowWhenNoBraceAfterSemicolon

      public void setAllowWhenNoBraceAfterSemicolon(boolean allowWhenNoBraceAfterSemicolon)
      Setter to allow unnecessary semicolon if closing paren is not on the same line.
      Parameters:
      allowWhenNoBraceAfterSemicolon - a value to set.

    • visitToken

      public void visitToken(DetailAST ast)
      Description copied from class: AbstractCheck
      Called to process a token.
      Overrides:
      visitToken in class AbstractCheck
      Parameters:
      ast - the token to process