Why It isn't getting input from user?

package com.codegym.task.task03.task0318;

/*
Plan to conquer the world

*/

import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader b = new BufferedReader(new InputStreamReader(System.in));
        System.out.println("Enter your name :-");
        String name = b.readLine();
       // System.out.println("Enter years :-");
       // int nyear = Integer.parseInt(b.readLine());
       System.out.println(name);
       // System.out.println(name + " will take over the world in" + nyear + " years. Mwa-ha-ha!");
    }
}

output:
Enter your name :-
null