1    /* 
2        This program creates an array of the first four prime numbers, prints them, and reverses the order 
3        of the first and last element in the array then prints that 
4     */
5    
6    
7    
8    package arrayPlay;
9    
10   public class Primes {
11   
12       public static void main (String [] args) {
13   
14           int [] primes = new int[4];
15   
16           primes[0] = 2;
17           primes[1] = 3;
18           primes[2] = 5;
19           primes[3] = 7;
20   
21           System.out.println("length of primes array = " + primes.length);
22           System.out.println("first prime = " + primes[0]);
23           System.out.println("last prime = " + primes[primes.length - 1]);
24   
25           System.out.println("\nThe initial array...");
26           int i = 0;
27           while (i < primes.length) {
28               System.out.println(primes[i]);
29               i = i + 1;
30           }
31   
32           int temp = primes[0];
33           primes[0] = primes[primes.length - 1];
34           primes[primes.length - 1] = temp;
35   
36           System.out.println("\nThe final array...");
37           for (int x = 0; x < primes.length; x = x + 1) {
38               System.out.println(primes[x]);
39           }
40       }
41   }
42