java.lang.Object.clone() java.lang.Number.shortValue() java.lang.Object.equals(Object obj) java.lang.Object.clone() package com.codingdict; import java.util.GregorianCalendar; public class ObjectDemo { public static void main(String[] args) { // create a gregorian calendar, which is an object GregorianCalendar cal = new GregorianCalendar(); // clone object cal into object y GregorianCalendar y = (GregorianCalendar) cal.clone(); // print both cal and y System.out.println("" + cal.getTime()); System.out.println("" + y.getTime()); } } java.lang.Number.shortValue() java.lang.Object.equals(Object obj)