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Vector set() Method in Java

Last Updated : 24 May, 2023
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The Java.util.Vector.set() method is used to replace any particular element in the vector, created using the Vector class, with another element. 

Syntax:

Vector.set(int index, Object element)

Parameters: This function accepts two mandatory parameters as shown in the above syntax and described below.

  • index: This is of integer type and refers to the position of the element that is to be replaced from the vector.
  • element: It is the new element by which the existing element will be replaced and is of the same object type as the vector.

Return Value: The method returns the previous value from the vector that is replaced with the new value. 

Below programs illustrate the Java.util.Vector.set() method: 

Program 1: 

Java




// Java code to illustrate set()
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 in the vector
        vec_tor.add("Geeks");
        vec_tor.add("for");
        vec_tor.add("Geeks");
        vec_tor.add("10");
        vec_tor.add("20");
 
        // Displaying the Vector
        System.out.println("Vector: " + vec_tor);
 
        // Using set() method to replace Geeks with GFG
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(2, "GFG"));
 
        // Using set() method to replace 20 with 50
        System.out.println("The Object that is replaced is: "
                           + vec_tor.set(4, "50"));
 
        // Displaying the modified vector
        System.out.println("The new Vector is:" + vec_tor);
    }
}
 






                        










Output:


Vector: [Geeks, for, Geeks, 10, 20]
The Object that is replaced is: Geeks
The Object that is replaced is: 20
The new Vector is:[Geeks, for, GFG, 10, 50]




Program 2: 




Java














                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















// Java code to illustrate set()


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 in the vector


        vec_tor.add(12);


        vec_tor.add(23);


        vec_tor.add(22);


        vec_tor.add(10);


        vec_tor.add(20);


 


        // Displaying the Vector


        System.out.println("Vector: " + vec_tor);


 


        // Using set() method to replace 12 with 21


        System.out.println("The Object that is replaced is: "


                           + vec_tor.set(0, 21));


 


        // Using set() method to replace 20 with 50


        System.out.println("The Object that is replaced is: "


                           + vec_tor.set(4, 50));


 


        // Displaying the modified vector


        System.out.println("The new Vector is:" + vec_tor);


    }


}



















                        







                        










Output:


Vector: [12, 23, 22, 10, 20]
The Object that is replaced is: 12
The Object that is replaced is: 20
The new Vector is:[21, 23, 22, 10, 50]




Time complexity: O(n). // n is the size of the vector.
Auxiliary Space: O(n).




                                    


                                                                        

                                        

                                            

                                                

                                                    
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                                                    kundankumarjha                                                

                                            

                                            

            
                                        

                                        

                                            
    

        
        
    
                                            

                                                
                                                
                                            

                                            

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