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Java

Posted by hangyul lee
hangyul lee
455 Points

I tried what I have learned in eclipse..but what is wrong with this! help!

package hihi;

import java.io.Console;

public class practise {

public static void main(String[] args) {

    Console console = System.console();
    String noun = console.readLine("Enter your name: ");
    console.printf("%s is my name", noun);

}

}

this is my coding and in the console I got:

Exception in thread "main" java.lang.NullPointerException at hihi.practise.main(practise.java:10)

can you tell me how can I fix it? is console not working in eclipse??

1 Answer

Jordan TheBest
Jordan TheBest
4,805 Points
Jordan TheBest
Jordan TheBest
4,805 Points

So your error is on line 10 which is this line in your code

String noun = console.readLine("Enter your name: ");

What I would do instead of that.

        String name;
        Scanner s = new Scanner(System.in);
        System.out.println("Enter your name: ");
        name = s.nextLine();
        System.out.printf("%s is my name", name);

I am pretty sure because you are setting it to a line that isn't there that is why you are getting a nullPointer because the response is null

and this is the response I got

Enter your name: 
Jordan
Jordan is my name

From my personal experience scanner is overall a lot nice to use when asking for user input scanner has a lot more methods on it. Here is a link for you :) https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html