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18 package jr239.co620;
19 import java.util.ArrayList;
20 import java.util.HashSet;
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25 public class CoupleTest {
26 public static void main (String[] args){
27 java.util.HashSet<Couple> s =new java.util.HashSet<Couple> (3);
28 Couple<Integer>
29 c =new Couple<Integer> (1,4),
30 d = new Couple<Integer> (4,1) ,
31 e = new Couple<Integer> (1,2),
32 f = new Couple<Integer> (2,1);
33
34 s.add(c);
35 s.add(f);
36 s.add(f);
37 assert (s.contains(d));
38 assert (s.contains(f));
39 assert (s.contains(f));
40 assert (s.contains(e));
41 Couple<Integer> cc = new Couple<Integer> (1,1);
42 assert !(s.contains(cc));
43 s.add(f);
44 assert s.add(f);
45
46
47 }
48
49
50 }