1 /*
 2  * Getting acquainted with basic array processing functionality.
 3  */
 4 package arrayplay;
 5 
 6 /**
 7  *
 8  * @author akc
 9  */
10 public class Primes {
11 
12     /**
13      * @param args the command line arguments
14      */
15     public static void main(String[] args) {
16 
17         int[] primes = new int[4];
18         
19         primes[0] = 2;
20         primes[1] = 3;
21         primes[2] = 5;
22         primes[3] = 7;
23                 
24         System.out.println("length of primes array = "+ primes.length);
25         System.out.println("first prime = " + primes[0]);
26         System.out.println("last prime = " + primes[3]);
27         System.out.println("last prime = " + primes[primes.length-1]);
28      
29         System.out.println("\nThe initial array ...");
30         int i = 0;
31         while ( i < primes.length ) {
32             System.out.println(primes[i]);
33             i = i + 1;
34         }
35 
36         int temp = primes[0];
37         primes[0] = primes[primes.length-1];
38         primes[primes.length-1] = temp;
39 
40         System.out.println("\nThe final array ...");
41         for ( int x = 0; x < primes.length;x=x+1) {
42             System.out.println(primes[x]);
43         }
44     }
45 
46 }
47