CODEWITHSUNDEEP
javaprintingconsole
Nathan
Nathan

Reputation: 11

Print string to a java.io.Console object

I'm making a multi-player game where each player has their own input/output console on the screen. I'm having a bit of trouble trying to do this. I don't want every player to see other player's in/outputs.

To use an analogy, I want to do something like playerOneConsole.out.println("Player One String");, instead of System.out.println("Player One String"); where everyone can see player one's stuff.

After reading some documentation, I've tried this, but it does not work as intended as it throws a NullPointerException:

public class Player {

    String myName;
    Console myConsole;

    public Player(String name) {
        myName = name;
        myConsole = System.console();
    }


    public void takeTurn(String playerOptions){
        myConsole.writer().print(playerOptions); //This is not right.
    }
}

I want playerOptions to print exclusively to that player's console, not the System console.

By the way, I'm using NetBeans IDE 8.0.2 if that makes a difference.

Upvotes: 1

Views: 211

Answers (1)

Luiggi Mendoza
Luiggi Mendoza

Reputation: 85809

When using java.io.Console, you must execute the Java app from a console e.g. Windows CMD or Linux Terminal. Most IDEs won't execute Java through a console, so System#console returns null.

By the way, this code:

myConsole.writer().print(playerOptions); //This is not right.

It's right indeed :)

Upvotes: 6

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