Java Set-list Collection Exercises

Add "a", "a", "C", "C", "a" 5 elements to the set collection and the list collection respectively, observing the duplicate value "a", whether it can be successfully added in the list collection and the Set collection.

Package Jihe;import java.util.*;p ublic class Lianxi {public static void main (string[] args) {set<string> s=new hashs Et<> (), S.add ("a"), S.add ("a"), S.add ("C"), S.add ("C"), S.add ("a"); for (String a:s) {System.out.println (" The element "+a" in the Ste Collection;}     System.out.println ();        List <String> l=new arraylist<> () l.add ("a"), L.add ("a"), L.add ("C"), L.add ("C"), L.add ("a"); for (String A: L) {System.out.println ("element in the list collection" +a);}}}

Java Set-list Collection Exercises