package collection;

public class SetDemo {
    public static void main(String[] args) {
        final Set<String> set1 = SetFactory.create();
        System.out.println("set1 = " + set1);

        final Set<String> set2 = set1.add("foo");
        System.out.println("set2 = " + set2);

        final Set<String> set3 = set2.add("foo");
        System.out.println("set3 = " + set3);

        final Set<String> set4 = set3.add("bar");
        System.out.println("set4 = " + set4);

        final Set<String> set5 = SetFactory.create("foo", "baz", "foo");
        System.out.println("set5 = " + set5);

        final Set<String> set6 = set4.union(set5);
        System.out.println("set6 = " + set6);

        final Set<String> set7 = set4.intersection(set5);
        System.out.println("set7 = " + set7);

        final Set<String> set8 = set5.intersection(set4);
        System.out.println("set8 = " + set8);
    }
}