java.util.Vector.clone() Method


The clone() method is used to get another copy of an existing 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.


Following is the declaration for java.util.Vector.clone() method

public Object clone()


  • This method does not take any parameter as input.

Return Value

Object − The method call returns a clone of this vector as an object.


CloneNotSupportedException − This exception is thrown if the object's class does not support the Cloneable interface.


The following example shows the usage of java.util.Vector.clone() method.

package com.tutorialspoint;

import java.util.Vector;

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

      // create an empty Vector vec with an initial capacity of 4      
      Vector<Integer> vec = new Vector<Integer>(4);
      Vector<Integer> vecclone = new Vector<Integer>(4);

      // use add() method to add elements in the vector

      // let us print all the elements available in vec
      System.out.println("Added numbers in vec vector are :- "); 
      for (Integer number : vec) {         
         System.out.println("Number = " + number);
      // let us clone the vector vec
      vecclone = (Vector)vec.clone();

      // let us print all the elements available in vecclone
      System.out.println("Added numbers in vecclone vector are :-");       
      for (Integer number : vecclone) {         
         System.out.println("Number = " + number);

Let us compile and run the above program, this will produce the following result.

Added numbers in vec vector are :- 
Number = 4
Number = 3
Number = 2
Number = 1
Added numbers in vecclone vector are :-
Number = 4
Number = 3
Number = 2
Number = 1
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