1 /*
 2  * Some basic functionalities of arrays...
 3  */
 4 package arrayplay;
 5 
 6 /**
 7  *
 8  * @author evankemp
 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