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Java Java Basics Getting Started with Java Introduction to Your Tools

Aaron Coursolle
Aaron Coursolle
18,014 Points
Posted by Aaron Coursolle
Aaron Coursolle
18,014 Points

If you ran this in an IDE, what would the alternative code look like?

As a review, and a way to get used to IntelliJ IDEA, I thought it would be a good idea to review the videos that I've already completed. However, this code won't work in an IDE environment.

I get that console was a shortcut that the instructor used, so that he could get to more important (especially for beginners) concepts. But I'm now at the "details" level and filling in the gaps that I missed my first time through the course.

With that long explanation, here is the code:

import java.io.Console;

public class Introductions {
    public static void main(String[] args)
    {
        Console console = System.console();
        console.printf("Hello There");
    }
}

Here is the error:

Exception in thread "main" java.lang.NullPointerException
    at Introductions.main(Introductions.java:7)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)

Process finished with exit code 1

What changes would I have to make, temporarily, to make an import console program work in IntelliJ?

Aaron Coursolle
Aaron Coursolle
18,014 Points
Aaron Coursolle
Aaron Coursolle
18,014 Points

I'm not looking for an alternative HelloWorld program but import console alternatives.

1 Answer

Jeremy Hill
Jeremy Hill
29,567 Points
Jeremy Hill
Jeremy Hill
29,567 Points

First, import java.util.Scanner; then instantiate a Scanner object like this:

Scanner input = new Scanner(System.in);

System.out.println("Enter anthing here >>>  ");
String string = input.next();
System.out.printf("You said %s.", string);