Java Cloning Examples

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1. How to clone an Object/How to make a copy of an Object

package basics;

public class CloneExample {

 // The Person value Object
 class Person implements Cloneable {
  private String name;
  private Address address;

  public Person(String name, String address) {
   this.name = name;
   this.address = new Address(address);
  }

  // Implementing cloning method
  protected Object clone() throws CloneNotSupportedException {
   Person clone = (Person) super.clone();
   clone.address = (Address) address.clone();
   return clone;

  }
 }

 // The Address value Object
 class Address implements Cloneable {
  String street = null;

  public Address(String street) {
   this.street = street;
  }

  // Implementing cloning method
  protected Object clone() throws CloneNotSupportedException {
   Address clone = (Address) super.clone();
   return clone;
  }

  public String toString() {
   return street;
  }
 }

 void testCloning() {
  try {
   Person person = new Person("calvin", "redhill");
   Person cloned = (Person) person.clone();
   System.out.println(cloned.name);
   System.out.println(cloned.address);

  } catch (CloneNotSupportedException e) {
   e.printStackTrace();
  }
 }

 public static void main(String[] args) {

  CloneExample example = new CloneExample();
  example.testCloning();
 }
}

The out put will be:

calvin
redhill