Vector clone() Method in Java with Examples

Last Updated : 26 Nov, 2018

The clone() method of Vector class is used to return a shallow copy of this vector. It just creates a copy of the vector. The copy will have a reference to a clone of the internal data array but not a reference to the original internal data array.

Syntax:

Vector.clone()

Parameters: The method does not take any parameter.

Return Value: The method returns an Object which is just the copy of the vector.
Exception :
CloneNotSupportedException − This exception is thrown if the object’s class does not support the Cloneable interface.

Below programs illustrate the Java.util.vector.clone() method:

Program 1:

// Java code to illustrate clone() 
  
import java.util.*; 
  
public class VectorDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Vector 
        Vector<String> vec_tor = new Vector<String>(); 
  
        // Use add() method to add elements into the vector 
        vec_tor.add("Welcome"); 
        vec_tor.add("To"); 
        vec_tor.add("Geeks"); 
        vec_tor.add("4"); 
        vec_tor.add("Geeks"); 
  
        // Displaying the Vector 
        System.out.println("Vector: " + vec_tor); 
  
        // Creating another vector to copy 
        Object copy_vector = vec_tor.clone(); 
  
        // Displaying the copy of vector 
        System.out.println("The cloned vector is: " + copy_vector); 
    } 
} 

Output:

Vector: [Welcome, To, Geeks, 4, Geeks]
The cloned vector is: [Welcome, To, Geeks, 4, Geeks]

Program 2:

// Java code to illustrate clone() 
  
import java.util.*; 
  
public class VectorDemo { 
    public static void main(String args[]) 
    { 
        // Creating an empty Vector 
        Vector<Integer> vec_tor = new Vector<Integer>(); 
  
        // Use add() method to add elements into the Queue 
        vec_tor.add(10); 
        vec_tor.add(15); 
        vec_tor.add(30); 
        vec_tor.add(20); 
        vec_tor.add(5); 
  
        // Displaying the Vector 
        System.out.println("Vector: " + vec_tor); 
  
        // Creating another vector to copy 
        Object copy_vector = (Vector)vec_tor.clone(); 
  
        // Displaying the copy of vector 
        System.out.println("The cloned vector is: " + copy_vector); 
    } 
} 

Output:

Vector: [10, 15, 30, 20, 5]
The cloned vector is: [10, 15, 30, 20, 5]

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