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