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Java

Posted by Ammar Fatihallah
Ammar Fatihallah
7,417 Points

java error

Hey guys i just started learning java and made this simple program and i dont know whats wrong with it. this is what the compiler is telling me (i'm using intellij idea): Exception in thread "main" java.lang.NullPointerException at com.treehouse.java.Main.main

this is my code:

package com.treehouse.java;

import java.io.Console;

public class Main {

public static void main(String[] args) {
    Console console = System.console();
    String q = console.readLine("what's your name? ");
    console.printf("Hi there %s , my name is ammar!", q);
}

}

any help is appreciated :)

2 Answers

Seth Kroger
Seth Kroger
56,416 Points
Seth Kroger
Seth Kroger
56,416 Points

Common issue with IDE's and java.io.Console. See: https://teamtreehouse.com/community/problem-in-ide

Ammar Fatihallah
Ammar Fatihallah
7,417 Points

I've already tried the system.out.println and the other ones and its still showing error. should i change my code editer ?

Shadd Anderson
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Shadd Anderson
Treehouse Project Reviewer
Shadd Anderson
.a{fill-rule:evenodd;}techdegree seal-36
Shadd Anderson
Treehouse Project Reviewer

I would suggest changing from Console, to a BufferedReader. It's a little bit more steady, especially with IDEs. It's a little tough to get set up at first, but once you get it, it's pretty easy.

Basically, put this in your code:

private BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

then instead of console.readLine, do br.readLine(). It'll complain of an IOException, but if you click on the red lightbulb on the side, it'll surround it with a try/catch block for you, which will fix the error.