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Java program to replace a specified element at all places with another element in Vector collection

Given a Vector collection, we have to replace a specified element at all places with another element in Vector collection.
Submitted by Nidhi, on May 25, 2022

Problem statement

In this program, we will create a Vector collection with integer elements. Then we will replace an element at all places with another element in vector collection using the Collections.repalceAll() method.

Source Code

The source code to replace a specified element at all places with another element in the Vector collection is given below. The given program is compiled and executed successfully.

// Java program to replace a specified element at all places 
// with another element in Vector collection

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Vector < Integer > vec = new Vector < Integer > ();

    vec.add(10);
    vec.add(20);
    vec.add(30);
    vec.add(20);
    vec.add(12);

    System.out.println("Vector elements: " + vec);

    Collections.replaceAll(vec, 20, 22);

    System.out.println("Vector elements: " + vec);
  }
}

Output

Vector elements: [10, 20, 30, 20, 12]
Vector elements: [10, 22, 30, 22, 12]

Explanation

In the above program, we imported the "java.util.*" package to use the Vector class. Here, we created a public class Main.

The Main class contains a main() method. The main() method is the entry point for the program. And, created a Vector collection vec with integer elements. Then we used the Collections.replaceAll() method to replace items 20 by 22 at all places in the Vector collection. After that, we printed the updated Vector collection.

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