Class EmptyFileFilter

  • All Implemented Interfaces:
    java.io.FileFilter, java.io.FilenameFilter, java.io.Serializable, IOFileFilter

    public class EmptyFileFilter
    extends AbstractFileFilter
    implements java.io.Serializable
    This filter accepts files or directories that are empty.

    If the File is a directory it checks that it contains no files.

    Example, showing how to print out a list of the current directory's empty files/directories:

     File dir = new File(".");
     String[] files = dir.list( EmptyFileFilter.EMPTY );
     for ( int i = 0; i < files.length; i++ ) {
         System.out.println(files[i]);
     }
     

    Example, showing how to print out a list of the current directory's non-empty files/directories:

     File dir = new File(".");
     String[] files = dir.list( EmptyFileFilter.NOT_EMPTY );
     for ( int i = 0; i < files.length; i++ ) {
         System.out.println(files[i]);
     }
     
    Since:
    1.3
    Version:
    $Id$
    See Also:
    Serialized Form
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected EmptyFileFilter()
      Restrictive constructor.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean accept​(java.io.File file)
      Checks to see if the file is empty.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
    • Field Detail

      • EMPTY

        public static final IOFileFilter EMPTY
        Singleton instance of empty filter
      • NOT_EMPTY

        public static final IOFileFilter NOT_EMPTY
        Singleton instance of not-empty filter
    • Constructor Detail

      • EmptyFileFilter

        protected EmptyFileFilter()
        Restrictive constructor.
    • Method Detail

      • accept

        public boolean accept​(java.io.File file)
        Checks to see if the file is empty.
        Specified by:
        accept in interface java.io.FileFilter
        Specified by:
        accept in interface IOFileFilter
        Overrides:
        accept in class AbstractFileFilter
        Parameters:
        file - the file or directory to check
        Returns:
        true if the file or directory is empty, otherwise false.