Java. util. ArrayList. set () method instance, java. util. arraylist

[Switch] Java. util. ArrayList. set () method instance, java. util. arraylist

Java. util. ArrayList. set (int index, E element)Replace and specify the elements at the specified position in this list.

Statement

The following is the declaration of the java. util. ArrayList. set () method.

public E set(int index, E element)

Parameters

• Index -- replace the index element.

• Element -- the element to be stored at the specified position.

Return Value

This method returns the element before the specified position.

Exception

• IndexOutOfBoundsException -- if the index is out of the range

Example

The following example demonstrates how to use java. util. Arraylist. set.

package com.yiibai;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's compile and run the above program, which will produce the following results:

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