Add element to hash set
boolean add(E e)- Adds the specified element to this set if it is not already present.
import java.util.HashSet;
public class Main{
public static void main(String args[]) {
HashSet<String> hs = new HashSet<String>();
hs.add("java2s.com");
hs.add("A");
hs.add("D");
hs.add("E");
hs.add("C");
hs.add("j a v a2s.com");
System.out.println(hs);
}
}
The output:
[D, E, j a v a2s.com, A, java2s.com, C]