org.apache.commons.collections.comparators
public class ReverseComparator extends Object implements Comparator, Serializable
Since: Commons Collections 2.0
Version: $Revision: 1.20 $ $Date: 2004/05/16 11:49:24 $
See Also: java.util.Collections#reverseOrder()
Constructor Summary | |
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ReverseComparator()
Creates a comparator that compares objects based on the inverse of their
natural ordering. | |
ReverseComparator(Comparator comparator)
Creates a comparator that inverts the comparison
of the given comparator. |
Method Summary | |
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int | compare(Object obj1, Object obj2)
Compares two objects in reverse order.
|
boolean | equals(Object object)
Returns true iff that Object is
is a {@link Comparator} whose ordering is known to be
equivalent to mine.
|
int | hashCode()
Implement a hash code for this comparator that is consistent with
{@link #equals(Object) equals}.
|
See Also: java.util.Collections#reverseOrder()
null
,
the ReverseComparator defaults to reversing the
natural order, as per
{@link java.util.Collections#reverseOrder()}.
Parameters: comparator Comparator to reverse
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
true
iff that Object is
is a {@link Comparator} whose ordering is known to be
equivalent to mine.
This implementation returns true
iff object.{@link Object#getClass() getClass()}
equals this.getClass()
, and the underlying
comparators are equal.
Subclasses may want to override this behavior to remain consistent
with the {@link Comparator#equals(Object) equals} contract.
Parameters: object the object to compare to
Returns: true if equal
Since: Commons Collections 3.0
Returns: a suitable hash code
Since: Commons Collections 3.0