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Java

Posted by Israel Herrera
Israel Herrera
429 Points

I am getting an exception in my IDE when trying to print a simple line through console.printf();

Exception in thread "main" java.lang.NullPointerException at Words.main(Words.java:7)

is the error message I get when I run the code below. Can someone shed some light on what I am doing wrong? :) I have tried this both in Intellij and Grooy Grails Tools Suite.

import java.io.Console; public class Words {

public static void main(String[] args) {
    Console console = System.console();
    console.printf("this is a test");

}

}

syalih
syalih
16,468 Points

Code is Ok did you try on Workspaces its working maybe some problem in your IDE dont know... :)

Israel Herrera
Israel Herrera
429 Points

I will give that a shot.

1 Answer

Will Scharff
Will Scharff
11,815 Points
Will Scharff
Will Scharff
11,815 Points

You could have the system write to standard out (stdout) and it would print to console this way. Plus it would not need an overhead for the import of java.io.Console.

For example just have this in main:

System.out.print("This is a test");

However, if you do want to make sure you are using Console.printf(), from what I read of the reference/manual page, you have not entered any information into the console and it is null. For example there is a method called "readLine." You could do:

String test = console.readLine(Enter String: ):

Once there is a string entered, then the console.printf should not be a null pointer and will not cause the null pointer exception. I hope this helps!!