package

org.apache.commons.collections.comparators

This package contains implementations of the java.util.Comparator Comparator interface.

You may also consider using ComparatorUtils, which is a single class that uses static methods to construct instances of the classes in this package.

Classes

BooleanComparator A Comparator for Boolean objects that can sort either true or false first. 
ComparableComparator A Comparator Comparator that compares Comparable Comparable objects. 
ComparatorChain

A ComparatorChain is a Comparator that wraps one or more Comparators in sequence. 

FixedOrderComparator A Comparator which imposes a specific order on a specific set of Objects. 
NullComparator A Comparator that will compare nulls to be either lower or higher than other objects. 
ReverseComparator Reverses the order of another comparator by reversing the arguments to its compare method. 
TransformingComparator Decorates another Comparator with transformation behavior.