Java set intersection, Difference set, and set __ "Java" Java collection

/** * Created by Yuhui on 2017/7/11 0011.
* * Import Java.util.HashSet;

Import Java.util.Set; public class Testset {public static void main (string[] args) {set<string> result = new Hashset<st
        Ring> ();
                set<string> Set1 = new Hashset<string> () {Add ("Glory of Kings");
                Add ("League of Heroes");
                Add ("Through the FireWire");
            Add ("Dungeon and Warrior");

        }   
        };
                set<string> Set2 = new Hashset<string> () {Add ("Glory of Kings");
                Add ("Dungeon and Warrior");
            Add ("World of Warcraft");

        }
        };
        Result.clear ();
        Result.addall (SET1);
        Result.retainall (Set2);

        System.out.println ("intersection:" + result);
        Result.clear ();
        Result.addall (SET1);
        Result.removeall (Set2);

        SYSTEM.OUT.PRINTLN ("Difference set:" + result);
        Result.clear ();
        Result.addall (SET1);
        Result.addall (Set2); SystEm.out.println ("and set:" + result);
 }

}

The results are as follows:

Intersection: [King Glory, Dungeon and Warrior]
Difference set: [League of Heroes, through the FireWire]
and set: [King Glory, League of Heroes, World of Warcraft, Dungeons and Warriors, through the FireWire]

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