Top Most Reality Behind Clone Your Java Object ;) ;) :) :)

First create your pojo class that implement Colonable Interface like below code

package com.myapp.concepts;

public class Employee implements Cloneable {

    private String name;
    private String designation;
    private Address address;

    public Address getAddress() {
        return address;
    }

    public void setAddress(Address address) {
        this.address = address;
    }

    public Employee() {

    }

    public String getDesignation() {
        return designation;
    }

    public void setDesignation(String designation) {
        this.designation = designation;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

}

class Address {
    private String city;

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }

    public String getCity() {
        return city;
    }

    public void setCity(String city) {
        this.city = city;
    }

    private String state;

    public Address() {

    }

}


Now test your Object before cloning and after cloning. There is magic behind the scene check out: For theory go to javapapers.com for practical come to my blog

package com.myapp.concepts;

public class ObjectCloneTest2 {

    public static void main(String s[]) {
        Employee emp = new Employee();
        emp.setName("James");
        emp.setDesignation("Programmer");
        Address address = new Address();
        address.setCity("Nehru Place");
        address.setState("Delhi state");
        emp.setAddress(address);

        System.out.println("Before cloning of Employee");

        System.out.println(emp.getName());
        System.out.println(emp.getDesignation());

        System.out.println(emp.getAddress().getCity());
        System.out.println(emp.getAddress().getState());

        System.out
                .println("After cloning of Employee i m changing the address with cloned object");
        try {
            Employee clonedEmp = (Employee) emp.clone();
            // changing the refered object of address with cloned object
            clonedEmp.setName("Siddharth");
            clonedEmp.getAddress().setCity("Noida");
            clonedEmp.getAddress().setState("UP");

            System.out.println("Cloned object details are:");
            System.out.println(clonedEmp.getName());
            System.out.println(clonedEmp.getDesignation());

            System.out.println(clonedEmp.getAddress().getCity());
            System.out.println(clonedEmp.getAddress().getState());

            System.out
                    .println("After changing with cloned object now address of Original object is:");

            System.out.println(emp.getName());
            System.out.println(emp.getDesignation());

            System.out.println(emp.getAddress().getCity());
            System.out.println(emp.getAddress().getState());

        } catch (CloneNotSupportedException cnse) {
            System.out.println("Cloneable should be implemented. " + cnse);
        }
    }

}