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Java

Posted by Leen Leenaerts
Leen Leenaerts
1,096 Points

Hangman game

Hi I was making the Hangman game myself without looking to the videos

I got the error:

Exception in thread "main" java.lang.NullPointerException at Prompter.makeGuess(Prompter.java:13) at Hangman.main(Hangman.java:8)

my code : 

public class Hangman {

    public static void main(String[] args) {

        Prompter prompter = new Prompter();
        Game game = new Game("cow");
        prompter.makeGuess();








    }

}





import java.io.Console;


public class Prompter {

    public Prompter(){
    }

    public void makeGuess() {
        Console console = System.console();
        String guess = console.readLine("Make a guess!");

        }


}





public class Game {
    private String mWord;

    public Game(String word) {
    mWord = word;   
    }





}
Mat Sanders
Mat Sanders
4,819 Points

It's complaining about line 13 in your prompter class. Something not being set. Something coming up null.

Leen Leenaerts
Leen Leenaerts
1,096 Points

It is : String letterAsString = console.readLine("Make a guess!"); But I don't see the problem there

Seth Kroger
Seth Kroger
56,416 Points

Are you running it in Workspaces or locally?

3 Answers

Seth Kroger
Seth Kroger
56,416 Points

Eclipse has issues with java.io.Console. You need to use System.in and System.out instead:

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
System.out.printf("Make a guess: ");
String guess = bufferedReader.readLine();
Leen Leenaerts
Leen Leenaerts
1,096 Points
Leen Leenaerts
Leen Leenaerts
1,096 Points

Locally in Eclipse

Leen Leenaerts
Leen Leenaerts
1,096 Points
Leen Leenaerts
Leen Leenaerts
1,096 Points

thanks a lot I just found it out since here it's working I tried to change it to yours and no errors anymore but it doesnt ask me for an input either ok, maybe its just better to work in workspace but now I just want to have it work in Eclipse too, just because it should be possible :D