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