Difference between Comparator and Comparable in Java?

Difference between Comparator and Comparable in Java?
Difference between Comparator and Comparable in Java?
Comparator[I]
- It is present in java.lang package and it contains only one method.
- [highlight]compareTo()[/highlight];Â Â
- If we are depending on default natural sorting order then while adding the object into the TreeSet JVM will call compareTo() method.Â
-
- If default natural sorting order not available or if we are not satisfied with natural sorting order then we can go for customized sorting by using the comparator.Â
- Comparable meant for default natural sorting order whereas Comparator meant for customized sorting order
package com.java4us; import java.util.TreeSet; public class Test { public static void main(String[] args) { TreeSet t = new TreeSet(); t.add("A"); t.add("Z"); // --> "Z".compareTo("A") retrun +ve t.add("T"); // --> "T".compareTo("Z") retrun -ve System.out.println(t); // [A, T, Z] } }