Package com.puppycrawl.tools.checkstyle.checks.coding

Class NoFinalizerCheck

  • All Implemented Interfaces:
    Configurable, Contextualizable
    public class NoFinalizerCheck
extends AbstractCheck

    Checks that there is no method finalize with zero parameters.

    See Object.finalize()

    Rationale: Finalizers are unpredictable, often dangerous, and generally unnecessary. Their use can cause erratic behavior, poor performance, and portability problems. For more information for the finalize method and its issues, see Effective Java: Programming Language Guide Third Edition by Joshua Bloch, §8.

    To configure the check: 

     <module name="NoFinalizer"/>

    Example:

      public class Test {

      protected void finalize() throws Throwable { // violation
          try {
             System.out.println("overriding finalize()");
          } catch (Throwable t) {
             throw t;
          } finally {
             super.finalize();
          }
      }
  }

    Parent is com.puppycrawl.tools.checkstyle.TreeWalker

    Violation Message Keys:

    • avoid.finalizer.method
    Since:
    5.0

    • Field Detail

      • MSG_KEY

        public static final java.lang.String MSG_KEY
        A key is pointing to the warning message text in "messages.properties" file.
        See Also:
        Constant Field Values

    • Constructor Detail

      • NoFinalizerCheck

        public NoFinalizerCheck()

    • Method Detail

      • 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:
        TokenTypes

      • 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:
        TokenTypes

      • 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:
        TokenTypes