haveFun method giving correct output however not passing validation

Question about the task

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need help!

1. Think about what the program is doing.
2. Change the haveFun method so that it calls:
- the play method if the person is a Player.
- the dance method if the person is a Dancer.

Requirements:

The Player class must implement the Person interface.
The Dancer class must implement the Person interface.
The haveFun method should call the play method if the passed object is a Player.
The haveFun method should call the dance method if the passed object is a Dancer.
The main method must read data from the keyboard.
The main method should stop reading data from the keyboard if the input string is "exit".

package com.codegym.task.task14.task1407; import java.io.BufferedReader; import java.io.InputStreamReader; /* Player and Dancer */ import java.io.BufferedReader; import java.io.InputStreamReader; /* Player and Dancer */ public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); Person person = null; String key; while (!(key = reader.readLine()).equals("exit")) { if ("player".equals(key)) { person = new Player(); } else if ("dancer".equals(key)) { person = new Dancer(); } takeBreak(person); } } public static void takeBreak(Person person) { haveFun(person); } public static void haveFun(Person obj) { if(obj instanceof Player) { new Player().play(); } else { new Dancer().dance(); } } public static void haveFun(Dancer obj) { obj.dance(); } interface Person { } static class Player implements Person { void play() { System.out.println("playing"); } } static class Dancer implements Person { void dance() { System.out.println("dancing"); } } }

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Azhar Iqbal

Level 18 , Multan, Pakistan

29 September 2018, 15:39

Simply Type conversion Required. :)

Joyonta Saha

Level 31

22 September 2018, 16:00

Thanks Ankush .

Ankush Rajput

Level 25 , Bhopal, India

22 September 2018, 12:22

In haveFun method, why are you creating a new Player object and calling play method. You are passing obj to haveFun method... call play method using Person obj object. Hint - You have to cast the obj from Person to Player object and then call play method using that.

Learner

Level 16 , India

1 October 2018, 05:10

I did this, doesn't work:

Player p = (Player) person;
p.play();

Ankush Rajput

Level 25 , Bhopal, India

1 October 2018, 05:19

Please share your full code. It should work.

Learner

Level 16 , India

1 October 2018, 06:07

package com.codegym.task.task14.task1407;

import java.io.BufferedReader;
import java.io.InputStreamReader;

/*
Player and Dancer

*/

public class Solution {
    public static void main(String[] args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Person person = null;
        String key;
        while (!(key = reader.readLine()).equals("exit")) {
            if ("player".equals(key)) {
                person = new Player();
            } else if ("dancer".equals(key)) {
                person = new Dancer();
            }
            haveFun(person);
        }
    }

    public static void haveFun(Person person) {
        //write your code here
        if(person instanceof Player) {
            //Player p = new Player();
            Player p = (Player) person;
            p.play();
        }else if (person instanceof Dancer) {
            //Dancer d = new Dancer();
            Dancer d = (Dancer) person;
            d.dance();
        }
    }

    interface Person {
    }

    static class Player implements Person {
        void play() {
            System.out.println("playing");
        }
    }

    static class Dancer implements Person {
        void dance() {
            System.out.println("dancing");
        }
    }
}

Ankush Rajput

Level 25 , Bhopal, India

1 October 2018, 06:24

code is working as expected. What error it is showing ?

Learner

Level 16 , India

1 October 2018, 06:38

Same verification warning as stated in the question above: The haveFun method should call the play method if the passed object is a Player. The haveFun method should call the dance method if the passed object is a Dancer.

Ankush Rajput

Level 25 , Bhopal, India

1 October 2018, 06:50

Don't remove the takebreak function. There is a difference in question and starting code they provided which they haven't yet rectified.

Learner

Level 16 , India

1 October 2018, 06:52

Yes, that worked.