//to get to know the concept of the arraylist
package arraylistplay;

import java.util.ArrayList;

public class Primes {
    public static void main(String[] args){
        ArrayList<Integer> primes = new ArrayList<>();
        primes.add(2);
        primes.add(3);
        primes.add(5);
        primes.add(7);

        System.out.println("size of primes List = " +primes.size());
        System.out.println("first prime = " +primes.get(0));
        System.out.println("last prime = " +primes.get(3));
        System.out.println("last prime = " +primes.get(primes.size()-1));

        System.out.println("\nThe intial list");
        for( Integer prime : primes){
            System.out.println(prime);
        }
        int temp = primes.get(0);
        primes.set(0,primes.get(primes.size()-1));
        primes.set(primes.size()-1,temp);

        System.out.println("\nThe final list");
        for( Integer prime : primes){
            System.out.println(prime);
        }

    }
}