Online Training Spring Hibernate Training in Delhi R Programming Training Course Big Data and Hadoop Training Java Training

Clone method example in Java

Given example of java clone() method illustrates, how to use clone() method.

Ads

Tutorials   
How to read properties file in Java? Generate random numbers in Java Cloneable Interface in Java What is the flaw with the Stack class? List In Java Java Stack Example HashSet In Java Enumeration in java How to generate random number in java Iterator in java Queue in java Transient Java Keyword clone method in Java Java Queue example Logger in Java Java current date - How to get current date in Java Collection : LinkedList Example Collection : ArrayList Example Random alpha numeric string of fixed size Java List Iterator Example The Hashtable Class The BitSet class Java Vector Java Enumeration Data Structures in Java Java Transient Variable Java Date Format Example Java Properties File Example Map.Entry Java Interface Java Property File java preferences,Change the value of Preferences by user Retrieving a Preference Node Java hasNext Write Keys and Values to the Properties file in Java Get All Keys and Values of the Properties files in Java Properties file in Java Properties file in Java Determining If a Preference Node Contains a Specific Value Change the value of Preferences by user Clone method example in Java Implementing a Simple Event Notifier Determining When a Preference Node Is Added or Removed Listening for Changes to Preference Values in a Preference Node Importing Preferences Finding a Preference in a Preference Tree Retrieving the Parent and Child Nodes of a Preference Node Determining If a Preference Node Exists Removing a Preference Node Creating a Preference Node Getting the Maximum Size of a Preference Key and Value
Ads

Clone method example in Java

     

Clone method example in Java programming language

Given example of java clone() method illustrates, how to use clone() method. The Cloneable interface defines a method called Clone(), which can be used to clone an object in your java program.

If you are trying to use the clone method in a class where Cloneable interface is not implemented, it throws CloneNotSupportedException. Clone() method is used to create and return copy of the object.

Clone method example code

import java.util.*;

public class CloneTest{
  public static void main(String[] args){

  Employee emp = new Employee("Amardeep"50000);
  emp.setHireDay(2005,0,0);
  Employee emp1 = (Employee)emp.clone();
  emp1.raiseSalary(20);
  emp1.setHireDay(20081231);
  System.out.println("Employee=" + emp);
  System.out.println("copy=" + emp1);
  }
}
class Employee implements Cloneable{
  public Employee(String str, double dou){
  name = str;
  salary = dou;
  }
  public Object clone(){
  try{
  Employee cloned = (Employee)super.clone();
  cloned.hireDay = (Date)hireDay.clone();
  return cloned;
  }
  catch(CloneNotSupportedException e){
  System.out.println(e);
  return null;
  }
  }
  public void setHireDay(int year, int month, int day){
  hireDay = new GregorianCalendar(year,month - 1, day).getTime();
  }
  public void raiseSalary(double byPercent){
  double raise = salary * byPercent/100;
  salary += raise;
  }
  public String toString(){
  return "[name=" + name+ ",salary=" + salary+ ",hireDay=" + hireDay+ "]";
  }
  private String name;
  private double salary;
  private Date hireDay;
}

Output of Clone method example:

C:\help>javac CloneTest.java

C:\help>java CloneTest
Employee=[name=Amardeep,salary=50000.0,hireDay=Tue Nov 30 00:00:00 GMT+05:30 2004]
copy=[name=Amardeep,salary=60000.0,hireDay=Wed Dec 31 00:00:00 GMT+05:30 2008]

Download code example discussed in this section.

Advertisements

Ads
Share on Google+Share on Google+

Clone method example in Java

Posted on: June 12, 2009 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Advertisements

 

Discuss: Clone method example in Java   View All Comments

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:3
Mohit
September 1, 2011
Errors

mohit-sharmas-macbook-pro:java programs mohitsharma$ javac CloneTest.java CloneTest.java:8: inconvertible types found : Object required: Employee Employee emp1 = (Employee)emp.clone(); ^ CloneTest.java:24: incompatible types found : Employee required: Object return cloned; ^ 2 errors
MANOJ KUMAR KANOJIA
December 4, 2012
core java

very simple example
zhang
April 24, 2013
about clone method

clone method is not defined in Cloneable interface! it's in Object.

Ads

 

Ads