java.lang.Object.getClass() java.lang.Object.finalize() java.lang.Object.hashCode() java.lang.Object.getClass() package com.codingdict; import java.util.GregorianCalendar; public class ObjectDemo { public static void main(String[] args) { // create a new ObjectDemo object GregorianCalendar cal = new GregorianCalendar(); // print current time System.out.println("" + cal.getTime()); // print the class of cal System.out.println("" + cal.getClass()); // create a new Integer Integer i = new Integer(5); // print i System.out.println("" + i); // print the class of i System.out.println("" + i.getClass()); } } java.lang.Object.finalize() java.lang.Object.hashCode()