Constructor Detail

• ReverseComparator

  public ReverseComparator()

  Creates a comparator that compares objects based on the inverse of their natural ordering. Using this Constructor will create a ReverseComparator that is functionally identical to the Comparator returned by java.util.Collections.reverseOrder().

  See Also:

  Collections.reverseOrder()

• ReverseComparator

  public ReverseComparator​(Comparator comparator)

  Creates a comparator that inverts the comparison of the given comparator. If you pass in null, the ReverseComparator defaults to reversing the natural order, as per Collections.reverseOrder().

  Parameters:

  comparator - Comparator to reverse

Method Detail

• compare

  public int compare​(Object obj1,
                     Object obj2)

  Compares two objects in reverse order.

  Specified by:

  compare in interface Comparator

  Parameters:

  obj1 - the first object to compare

  obj2 - the second object to compare

  Returns:

  negative if obj1 is less, positive if greater, zero if equal

• hashCode

  public int hashCode()

  Implement a hash code for this comparator that is consistent with equals.

  Overrides:

  hashCode in class Object

  Returns:

  a suitable hash code

  Since:

  Commons Collections 3.0

• equals

  public boolean equals​(Object object)

  Returns true iff that Object is is a Comparator whose ordering is known to be equivalent to mine.

  This implementation returns true iff object.getClass() equals this.getClass(), and the underlying comparators are equal. Subclasses may want to override this behavior to remain consistent with the equals contract.

  Specified by:

  equals in interface Comparator

  Overrides:

  equals in class Object

  Parameters:

  object - the object to compare to

  Returns:

  true if equal

  Since:

  Commons Collections 3.0