The clone() method of the Vector class is used to return a shallow copy of this vector provided by the Object class. 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 parameters.
Return Value: The method returns an Object which is just the copy of the vector.
Exception Thrown: CloneNotSupportedException: This exception is thrown if the object’s class does not support the Cloneable interface.
Example 1:
Java
// Java Program to Illustrate clone() method of Vector class// Importing required classesimport java.util.*;// Main class// VectorDemopublic class GFG { // Main driver method public static void main(String args[]) { // Creating an empty Vector by creating object // of vector class of string type Vector<String> vec_tor = new Vector<String>(); // Adding custom input elements into the vector // using add() method vec_tor.add("Welcome"); vec_tor.add("To"); vec_tor.add("Geeks"); vec_tor.add("For"); vec_tor.add("Geeks"); // Print and display all vector elements System.out.println("Vector: " + vec_tor); // Creating another vector to copy by // creating an object of Object class Object copy_vector = vec_tor.clone(); // Print and display the cloned vector elements System.out.println("The cloned vector is: " + copy_vector); }} |
Vector: [Welcome, To, Geeks, For, Geeks] The cloned vector is: [Welcome, To, Geeks, For, Geeks]
Example 2:
Java
// Java Program to Illustrate clone() method of Vector class// Importing required classesimport java.util.*;// Main class// VectorDemopublic class VectorDemo { // Main driver method public static void main(String args[]) { // Creating an empty Vector by creating // object of Vector class of Integer type Vector<Integer> vec_tor = new Vector<Integer>(); // Add custom input elements for // using add() method vec_tor.add(10); vec_tor.add(15); vec_tor.add(30); vec_tor.add(20); vec_tor.add(5); // Print and display the vector elements System.out.println("Vector: " + vec_tor); // Creating another vector to copy by // creating object of Object class Object copy_vector = (Vector)vec_tor.clone(); // Print and display elements of cloned vector System.out.println("The cloned vector is: " + copy_vector); }} |
Vector: [10, 15, 30, 20, 5] The cloned vector is: [10, 15, 30, 20, 5]
Note: In the above examples we have cloned vectors by creating objects of Object class itself as it does provide clone() method. So if object classes are not supporting any cloneable interface then it will not allow to clone and copy vector elements so does it will throw CloneNotSupportedException.
