1 /* 2 * A program that prints out the single digit prime numbers. 3 */ 4 5 package arraylistplay; 6 7 import java.util.ArrayList; 8 9 public class Primes { 10 11 public static void main(String[] args) { 12 13 ArrayList<Integer> primes = new ArrayList<>(); 14 15 primes.add(2); 16 primes.add(3); 17 primes.add(5); 18 primes.add(7); 19 20 System.out.println("size of primes list = " + primes.size()); 21 System.out.println("first prime = " + primes.get(0)); 22 System.out.println("last prime = " + primes.get(3)); 23 System.out.println("last prime = " + primes.get(primes.size()-1)); 24 25 System.out.println("\nThe initial list ..."); 26 for (Integer prime : primes ) { 27 System.out.println(prime); 28 } 29 30 int temp = primes.get(0); 31 primes.set(0, primes.get(primes.size()-1)); 32 primes.set(primes.size()-1,temp); 33 34 System.out.println("\nThe final list ..."); 35 for (Integer prime : primes ) { 36 System.out.println(prime); 37 } 38 } 39 } 40