With this example we are going to demonstrate how to create a cloneable object of a class. In short, to create a cloneable object of a class, we have created a class that implements the Cloneable interface, so that it can use the clone() method to create cloneable objects, as described in the following steps:
- We have created a class
Person, that implements the Cloneable interface. It has two String fields. - The class overrides the
clone()method of Object, where it creates a clonePersonobject, sets the fields of the clone object to the ones of the original one, and returns the clone object. It also has getters and setters for its fields. - We create a new
Personobject and then use theclone()method to get its clone, then use theclone()method to get a clone of the clone.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
public class ClonableClass {
public static void main(String[] args) {
Person person1 = new Person();
person1.setFN("F");
person1.setLN("L");
Person person2 = (Person) person1.clone();
Person person3 = (Person) person2.clone();
System.out.println("Person 1: " + person1.getFN() + " " + person1.getLN());
System.out.println("Person 2: " + person2.getFN() + " " + person2.getLN());
System.out.println("Person 3: " + person3.getFN() + " " + person3.getLN());
}
}
class Person implements Cloneable {
private String fn;
private String ln;
@Override
public Object clone() {
Person object = new Person();
object.setFN(this.fn);
object.setLN(this.ln);
return object;
}
public String getFN() {
return fn;
}
public void setFN(String firstName) {
this.fn = firstName;
}
public String getLN() {
return ln;
}
public void setLN(String lastName) {
this.ln = lastName;
}
}
Output:
Person 1: F L
Person 2: F L
Person 3: F L
This was an example of how to create a cloneable object of a class in Java.
