arraylist-swaping-2-numbers.java

import java.util.ArrayList;

public class Main{
    
    public static void swap(ArrayList<Integer>list, int indx1, int indx2){
        
        int temp = list.get(indx1);
        list.set(indx1, list.get(indx2));
        list.set(indx2, temp);
    
    }
    

    public static void main(String[]args){
        
        ArrayList<Integer>list = new ArrayList<>();
        
        //2, 5, 9, 3, 6 after swap 2, 3, 9, 5, 6
        
        list.add(2);
        list.add(5);
        list.add(9);
        list.add(3);
        list.add(6);
        
        int indx1 =1, indx2 =3; 
        System.out.println(list);
        swap(list, indx1, indx2);
        System.out.println(list);
    }
}