java.lang.Object.toString() java.lang.Object.notifyAll() java.lang.Long.getLong(String nm, long val) java.lang.Object.toString() package com.codingdict; import java.util.ArrayList; public class ObjectDemo { public static void main(String[] args) { // get an integer Integer i = new Integer(50); // get a list ArrayList list = new ArrayList(); // add some elements in list list.add(50); list.add("Hello World"); // print their string representation System.out.println("" + i.toString()); System.out.println("" + list.toString()); } } java.lang.Object.notifyAll() java.lang.Long.getLong(String nm, long val)