1    package arrayplay;
2    /* 
3    * This program tests out the different ways to print array values and explores how to set array indexes equal to values. 
4     */
5    
6    public class Primes {
7        public static void main(String[] args)
8        {
9            int[] primes = new int[4];
10   
11           primes[0] = 2;
12           primes[1] = 3;
13           primes [2] = 5;
14           primes[3] = 7;
15   
16           System.out.println("length of primes array = " + primes.length);
17           System.out.println("first prime = " + primes[0]);
18           System.out.println("last prime = " + primes[3]);
19           System.out.println("last prime = " + primes[primes.length-1]);
20   
21           System.out.println("\n The initial array ...");
22           int i = 0;
23           while(i < primes.length)
24           {
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           {
36               System.out.println(primes[x]);
37           }
38       }
39   }
40