1 // Program that uses one array to make another, swapping the first and last elements 2 3 4 5 6 package arrayplay; 7 8 public class Primes { 9 10 public static void main(String[] args) { 11 12 int[] primes = new int[4]; 13 14 primes[0] = 2; 15 primes[1] = 3; 16 primes[2] = 5; 17 primes[3] = 7; 18 19 System.out.println("Length of primes array = " + primes.length); 20 System.out.println("First prime = " + primes[0]); 21 System.out.println("Last prime = " + primes[3]); 22 System.out.println("Last prime = " + primes[primes.length - 1]); 23 24 System.out.println("\nThe initial array ..."); 25 int i = 0; 26 while (i < primes.length) { 27 System.out.println(primes[i]); 28 i = i + 1; 29 } 30 31 int temp = primes[0]; 32 primes[0] = primes[primes.length - 1]; 33 primes[primes.length - 1] = temp; 34 35 System.out.println("\nThe final array ... "); 36 for (int x = 0; x < primes.length; x = x + 1) { 37 System.out.println(primes[x]); 38 } 39 } 40 41 } 42