1    /* 
2     *Reasonable lead comment 
3     * Primes is the first array program 
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   
28               System.out.println(primes[i]);
29               i = i + 1;
30   
31           }
32   
33           int temp = primes[0];
34           primes[0] = primes[primes.length-1];
35           primes[primes.length-1] = temp;
36   
37           System.out.println("\nThe final array ... ");
38           for (int x = 0; x < primes.length; x = x + 1 ) {
39   
40               System.out.println(primes[x]);
41   
42           }
43   
44       }
45   
46   }
47