Given below the sample code :

1.  import java.util.*;
2.  public class Demo {
3.  public static void main(String[] args) {
4.  // insert code here
5.  t.add(new Integer(2));
6.  t.add(new Integer(1));
7.  System.out.println(t);
8.  }
9.  }

Which line given below should place at line 4 to give output [1, 2] , by the above code?

1. Set set = new LinkedHashSet();

2. Set set = new SortedSet();

3. Set set = new HashSet();

4. Set set = new TreeSet();

Answer

(4)

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