Java.util.ArrayList.set() Method

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Description

The java.util.ArrayList.set(int index, E element) replaces the element at the specified position in this list with the specified element.

Declaration

Following is the declaration for java.util.ArrayList.set() method

public E set(int index, E element)

Parameters

  • index -- This is the index of the element to replace.

  • element -- This is the element to be stored at the specified position.

Return Value

This method returns the element previously at the specified position.

Exception

  • IndexOutOfBoundsException -- If the index is out of range

Example

The following example shows the usage of java.util.Arraylist.set() method.

package com.tutorialspoint;

import java.util.ArrayList;

public class ArrayListDemo {
   public static void main(String[] args) {
      
      // create an empty arraylist with an initial capacity
      ArrayList<Integer> arrlist = new ArrayList<Integer>(5);

      // use add() method to add elements in the list
      arrlist.add(15);
      arrlist.add(20);
      arrlist.add(25);
      arrlist.add(22);

      // let us print all the elements available in list
      for (Integer number : arrlist) {
        System.out.println("Number = " + number);
      }

      // inserting elment 55 at 3rd position
      arrlist.set(2,55);
	  
      // let us print all the elements available in list
      System.out.println("Printing new list:");
      for (Integer number : arrlist) {
        System.out.println("Number = " + number);
      } 
   }
}

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

Number = 15
Number = 20
Number = 25
Number = 22
Printing new list:
Number = 15
Number = 20
Number = 55
Number = 22



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