I don't understand the override very well.

1. Is java.lang.String class & java.lang.Integer class override toString() method of "Object" class? why?
2. Is Test classoverride toString() method of "Object" class? why?

import java.util.*; public class Test { public static void main (String []args) { String s = new String ("kim"); System.out.println(s); Integer i = new Integer(10); System.out.println (i); Test t = new Test(); System.out.println(t); } }