1    /* 
2    Progam featuring an ArrayList of single digit primes. 
3     */
4    
5    package arraylistplay;
6    
7    import java.util.ArrayList;
8    public class Primes {
9    
10           public static void main(String[] args) {
11   
12               ArrayList<Integer> primes = new ArrayList<>();
13   
14               primes.add(2);
15               primes.add(3);
16               primes.add(5);
17               primes.add(7);
18   
19               System.out.println("size of primes list = " + primes.size());
20               System.out.println("first prime = " + primes.get(0));
21               System.out.println("last prime = " + primes.get(3));
22               System.out.println("last prime = " + primes.get(primes.size() - 1));
23   
24               System.out.println("\nThe initial list...");
25               for (Integer prime : primes) {
26                   System.out.println(primes);
27               }
28   
29           int temp = primes.get(0);
30       primes.set(0, primes.get(primes.size()-1));
31       primes.set(primes.size()-1,temp);
32   
33       System.out.println("\nThe final list...");
34       for ( Integer prime : primes ) {
35               System.out.println(prime);
36           }
37       }
38   
39   }
40