Class NumberComparator

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

    public class NumberComparator
    extends java.lang.Object
    implements java.util.Comparator<java.lang.Object>
    Comparator for Number type. This is a singleton class. Call getInstance() to get the comparator.
    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected NumberComparator()
      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 Numbers.
      static NumberComparator getInstance()
      Returns NumberComparator singleton.
      boolean isAbsolute()
      Checks if if the values are compared using the absolute values.
      void setAbsolute​(boolean absolute)
      Sets the flag to compare the values using the absolute value.
      • 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
    • Field Detail

      • CONTEXT_ABSOLUTE

        public static final ComparatorContext CONTEXT_ABSOLUTE
        Comparator Context to compare two values using the absolute value.
    • Constructor Detail

      • NumberComparator

        protected NumberComparator()
        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 NumberComparator getInstance()
        Returns NumberComparator singleton.
        Returns:
        an instance of NumberComparator.
      • compare

        public int compare​(java.lang.Object o1,
                           java.lang.Object o2)
        Compares two Numbers.
        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, -1 if a is less than b, 1 if a is more than b.
      • isAbsolute

        public boolean isAbsolute()
        Checks if if the values are compared using the absolute values.
        Returns:
        true or false.
      • setAbsolute

        public void setAbsolute​(boolean absolute)
        Sets the flag to compare the values using the absolute value.
        Parameters:
        absolute - true or false.