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Java

Posted by Rakib Ahmed
Rakib Ahmed
156 Points

Not getting any output when i have copied all the code from the video.

Hello.

I am currently following the java course. In particular the java object course, the creating the MVP part and the video prompting for guesses. I haven't been using the workspace provided by treehouse rather i have been using netbeans. I have noticed that the console method and class doesn't work for netbeans. So alternatively i have been using the class and methods Scanner. So i have copied the exact code from the video just replacing console for scanner. The problem that i am having is that although the program runs i am not receiving any output and i have copied the exact code from the treehouse video on to netbeans. Here it is :

package hangman; import java.util.Scanner;

public class Prompter { private Game game;

public Prompter(Game game) { this.game = game;
}

public boolean promptForGuess() { Scanner scanner = new Scanner(System.in); String guessAsString = scanner.next("Enter a letter: "); char guess = guessAsString.charAt(0); return game.applyGuess(guess); } }

Could you please advise me what to do with scanner and also how to do it to gain an output. Could you also explain any differences that the treehouse workspace has compared to any regular IDE's such as netbeans.

Thank You

Paul Ryan
Paul Ryan
4,584 Points

https://teamtreehouse.com/community/cheatsheet

Can you please format your code so it is easier to read.

2 Answers

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Rakib, puzzled why you say "I have noticed that the console method and class doesn't work for netbeans."

Try this. First import the class:

import java.io.Console;

This line must be at the very top. Then create a Console object in your promptForGuess() method:

Console console = System.console();

You should now be able to do this:

String guessAsString = console.readLine("Type a character: ");

in the method.

This all works fine in my IDE, so I'd be really surprised if it doesn't work in your netbeans.

Rakib Ahmed
Rakib Ahmed
156 Points
Rakib Ahmed
Rakib Ahmed
156 Points

Hello

Thank you for your reply. I have added the code that you have sent but it still doesn't run on netbeans. Before running the program there aren't any highlighted errors. However when I run the program the error that appears is

"Exception in thread "main" java.lang.NullPointerException at hangman.Prompter.promptForGuess(Prompter.java:15) at hangman.HangMan.main(HangMan.java:9) Java Result: 1"

This is the code written in both those places

(Prompter.java:15) = String guessAsString = console.readLine("Enter a letter: ");

(HangMan.java:9) = boolean isHit = prompter.promptForGuess();

Still unsure as to why it's not running.