java.lang.Enum.clone() java.lang.Double.valueOf(String s) java.lang.Enum.compareTo() java.lang.Enum.clone() package com.codingdict; import java.lang.*; // enum showing Mobile prices enum Mobile { Samsung(400), Nokia(250); int price; Mobile(int p) { price = p; } int showPrice() { return price; } } public class EnumDemo { public static void main(String args[]) { System.out.println("Enums can never be cloned..."); EnumDemo t = new EnumDemo() { protected final Object clone() throws CloneNotSupportedException { throw new CloneNotSupportedException(); } }; System.out.println("CellPhone List:"); for(Mobile m : Mobile.values()) { System.out.println(m + " costs " + m.showPrice() + " dollars"); } } } java.lang.Double.valueOf(String s) java.lang.Enum.compareTo()