treeset in java

package framework;

import java.util.TreeSet;

public class treeset {
    public static void main(String[] args) {

        String name = "amalareegan";
                TreeSet hs = new TreeSet();
                hs.add(50);
                hs.add(10);
                hs.add(20);
                hs.add(30);
                System.out.println(hs);
        }
    }

[10, 20, 30, 50]