public class HashCodeTest {
public static void main(String[] args) {
HashSet set = new HashSet();
for (int i = 0; i <= 3; i++){
set.add(new BeanA(i));
}
System.out.println(set);
set.add(new BeanA(1));
System.out.println(set.toString());
System.out.println(set.contains(new BeanA(0)));
System.out.println(set.add(new BeanA(1)));
System.out.println(set.add(new BeanA(4)));
System.out.println(set);
}
}
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