1    package arrayplay;
2    
3    public class Primes {
4    
5        public static void main(String[] args) {
6    
7            int[] primes = new int[]{2, 3, 5, 7};
8    
9            System.out.println("length of primes array = " + primes.length);
10           System.out.println("first prime = " + primes[0]);
11           System.out.println("last prime = " + primes[3]);
12           System.out.println("last prime = " + primes[primes.length - 1]);
13   
14           System.out.println("\nThe initial array ...");
15           int i = 0;
16           while (i < primes.length) {
17               System.out.println(primes[i]);
18               i = i + 1;
19           }
20   
21           int temp = primes[0];
22           primes[0] = primes[primes.length - 1];
23           primes[primes.length - 1] = temp;
24   
25           System.out.println("\nThe final array ...");
26           for (int x = 0; x < primes.length; x++) {
27               System.out.println(primes[x]);
28           }
29   
30   
31       }
32   
33   }
34