package arraylistplay;


import java.util.ArrayList;


public class Primes {
    public static void main(String[] args) {
        ArrayList<Integer> primes = new ArrayList<>();

        primes.add(3);
        primes.add(5);
        primes.add(7);
        primes.add(11);

        System.out.println("length 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 initial 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 array ...");
        for (Integer prime : primes) {
            System.out.println(prime);
        }
    }

}