1 2 /* 8.1 3 * A program that print out sting array's elements with loops. 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 }