/* + A program to demo the initial array and final array */ package arrayplay; 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("length of primes array = "+ primes.length); System.out.println("first prime = "+ primes[0]); System.out.println("last prime = "+ primes[3]); System.out.println("last prime = "+ primes[primes.length-1]); System.out.println("\nThe initial array ..."); int i = 0; while (i <primes.length){ System.out.println(primes[i]); 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 = x+1){ System.out.println(primes[x]); } } }