1    /* 
2    * This program will use a set of terms in an array. 
3     */
4    package arrayplay;
5    
6        public class Primes {
7    
8            public static void main(String[] args) {
9    
10               int[] primes = new int[4];
11   
12               primes[0] = 2;
13               primes[1] = 3;
14               primes[2] = 5;
15               primes[3] = 7;
16   
17               System.out.println("length of primes array = " + primes.length);
18               System.out.println("first prime = " + primes[0]);
19               System.out.println("last prime = " + primes[3]);
20               System.out.println("last prime = " + primes[primes.length-1]);
21   
22               System.out.println("\nThe initial array ...");
23               int i = 0;
24               while ( i < primes.length ) {
25                   System.out.println(primes[i]);
26                   i = i + 1;
27               }
28   
29               int temp = primes[0];
30               primes[0] = primes[primes.length-1];
31               primes[primes.length-1] = temp;
32   
33               System.out.println("\nThe final array ...");
34               for ( int x = 0; x < primes.length; x = x + 1 ) {
35                   System.out.println(primes[x]);
36               }
37           }
38      }