package arrayplay; /* program to demonstrate an array using primes */ public class primes { public static void main(String[] args){ int[] primes = new int[4]; primes[0] = 2; primes[1] = 3; primes[2] = 5; primes[3] = 7; System.out.println("The length of primes array = " + primes.length); System.out.println("The first prime = " + primes[0]); System.out.println("The last prime = " + primes[3]); System.out.println("The last prime = " + primes[primes.length - 1]); System.out.println("\n The initial array ..."); int i = 0; while (i < primes.length) { System.out.println(primes[i]); i += 1; } int temp = primes[0]; primes[0] = primes[primes.length - 1]; primes[primes.length - 1] = temp; System.out.println("\nThe final array..."); for (int x = 0; x < primes.length; x += 1) { System.out.println(primes[x]); } } }