Illustrate with an example the difference between deep and shallow copy in java?

import java.io.*; import java.util.*; public class Employee implements Cloneable,Serializable { int eno; String ename; Address addr; public Employee(int en,String name,Address a) { eno=en; ename=name; addr=a; } public Object clone() throws CloneNotSupportedException { Object o=null; try{ ByteArrayOutputStream baos=new ByteArrayOutputStream(); ObjectOutputStream oos=new ObjectOutputStream(baos); oos.writeObject(this); ByteArrayInputStream bais=new ByteArrayInputStream(baos.toByteArray()); ObjectInputStream ois=new ObjectInputStream(bais); o=ois.readObject(); } catch(Exception e) { System.out.println(e.getMessage()); } return o; } } Address.java import java.io.*; import java.util.*; public class Address implements Cloneable,Serializable { String streetno; String city; public Address(String s,String c) { streetno=s; city=c; } } Test.java public class Test { public static void main(String[] args) { try { Address a1=new Address("123","Hyderabad"); Employee e1=new Employee(1,"Neil",a1); Employee e2=(Employee)e1.clone(); System.out.println(e2.addr.city); e1.addr.city="Mumbai"; e1.ename="shan"; System.out.println(e2.addr.city); System.out.println(e2.ename); } catch(Exception e) { System.out.println(e.getMessage()); } } }