1    package ArrayListPlay;
2    
3    import java.util.ArrayList;
4    
5    public class Primes {
6    
7        public static void main(String[] args) {
8    
9            ArrayList<Integer> primes = new ArrayList<>();
10   
11           primes.add(2);
12           primes.add(3);
13           primes.add(5);
14           primes.add(7);
15   
16           System.out.println("size of primes list = " + primes.size());
17           System.out.println("size of primes list = " + primes.get(0));
18           System.out.println("size of primes list = " + primes.get(3));
19           System.out.println("size of primes list = " + primes.get(primes.size()-1));
20   
21           System.out.println("\nThe initial list...");
22           for ( Integer prime : primes) {
23               System.out.println(prime);
24   
25           }
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