Class LastModifiedFileComparator

  • All Implemented Interfaces:
    java.io.Serializable, java.util.Comparator<java.io.File>

    public class LastModifiedFileComparator
    extends AbstractFileComparator
    implements java.io.Serializable
    Compare the last modified date/time of two files for order (see File.lastModified()).

    This comparator can be used to sort lists or arrays of files by their last modified date/time.

    Example of sorting a list of files using the LASTMODIFIED_COMPARATOR singleton instance:

           List<File> list = ...
           ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_COMPARATOR).sort(list);
     

    Example of doing a reverse sort of an array of files using the LASTMODIFIED_REVERSE singleton instance:

           File[] array = ...
           ((AbstractFileComparator) LastModifiedFileComparator.LASTMODIFIED_REVERSE).sort(array);
     

    Since:
    1.4
    See Also:
    Serialized Form
    • Field Summary

      Fields 
      Modifier and Type Field Description
      static java.util.Comparator<java.io.File> LASTMODIFIED_COMPARATOR
      Last modified comparator instance
      static java.util.Comparator<java.io.File> LASTMODIFIED_REVERSE
      Reverse last modified comparator instance
      private static long serialVersionUID  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int compare​(java.io.File file1, java.io.File file2)
      Compare the last the last modified date/time of two files.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
      • Methods inherited from interface java.util.Comparator

        equals, reversed, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong
    • Field Detail

      • LASTMODIFIED_COMPARATOR

        public static final java.util.Comparator<java.io.File> LASTMODIFIED_COMPARATOR
        Last modified comparator instance
      • LASTMODIFIED_REVERSE

        public static final java.util.Comparator<java.io.File> LASTMODIFIED_REVERSE
        Reverse last modified comparator instance
    • Constructor Detail

      • LastModifiedFileComparator

        public LastModifiedFileComparator()
    • Method Detail

      • compare

        public int compare​(java.io.File file1,
                           java.io.File file2)
        Compare the last the last modified date/time of two files.
        Specified by:
        compare in interface java.util.Comparator<java.io.File>
        Parameters:
        file1 - The first file to compare
        file2 - The second file to compare
        Returns:
        a negative value if the first file's lastmodified date/time is less than the second, zero if the lastmodified date/time are the same and a positive value if the first files lastmodified date/time is greater than the second file.