Java J2ee Planet

Classes that implement these two interfaces play different roles in the sorting process. A class that implements the Comparable interface, i.e., a Comparable type, is the type that is sorted, while a class that implements the Comparator interface, i.e., a Comparator, is used to compare other types. A Comparable object can compare itself to another Object using its compareTo(Object other) method. The object itself defines how the comparison is done. Interface Comparable has a method: public int compareTo(T o) A Comparator object is used to compare two objects of the same type using the compare(Object other1, Object other2) method. When using a Comparator, the objects being compared don't need to define the rule of comparison. Interface Comparator has a method: public int compare(T o1, T o2)