Class DefaultComparator

  • All Implemented Interfaces:
    java.util.Comparator<java.lang.Object>

    public class DefaultComparator
    extends java.lang.Object
    implements java.util.Comparator<java.lang.Object>
    Badly named, this class compares objects by first converting them to Strings using the toString method.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected DefaultComparator()
      Constructor.
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int compare​(java.lang.Object o1, java.lang.Object o2)
      Compares two Objects using the toString() method as the value of each object to compare.
      static DefaultComparator getInstance()
      Returns ObjectComparator singleton.
      • Methods inherited from class java.lang.Object

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

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

      • DefaultComparator

        protected DefaultComparator()
        Constructor.

        Has protected access to prevent other clients creating instances of the class ... it is stateless so we need only one instance.

    • Method Detail

      • getInstance

        public static DefaultComparator getInstance()
        Returns ObjectComparator singleton.
        Returns:
        an instance of DefaultComparator.
      • compare

        public int compare​(java.lang.Object o1,
                           java.lang.Object o2)
        Compares two Objects using the toString() method as the value of each object to compare.
        Specified by:
        compare in interface java.util.Comparator<java.lang.Object>
        Parameters:
        o1 - the first object to be compared
        o2 - the second object to be compared
        Returns:
        0 if a and b are equal, less than 0 if a < b, grater than 0 if a > b.