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Java Java Basics Getting Started with Java Strings and Variables

Posted by Pierce Mulligan
Pierce Mulligan
1,106 Points

My code looks exactly the same but I'm experiencing an error. Any ideas why?

my code:

import java.io.Console;

public class Introductions {

    public static void main(String[] args) {
        Console console = System.console();
        // Welcome to the Introductions program!  Your code goes below here
        String firstName = "Whitty";
        console.printf("Hello, my name is %s\n, firstName");
        console.printf("%s is learning how to write java\n, firstName");

  }
}

my console output:

Exception in thread "main" java.util.MissingFormatArgumentException : Format specifier '%s'
at java.util.Formatter.format(Formatter.java:2519)
at java.util.Formatter.format(Formatter.java:2455)
at java.io.Console.format(Console.java:170)
at java.io.Console.printf(Console.java:209)
at Introductions.main(Introductions.java:9)

Any explanation?

Leen Leenaerts
Leen Leenaerts
1,096 Points
Leen Leenaerts
Leen Leenaerts
1,096 Points

As far as I know it should be

"Hello, my name is %s\n", firstName

instead of

"Hello, my name is %s\n, firstName"

I am not sure if this would solve it

1 Answer

Luke Glazebrook
Luke Glazebrook
13,564 Points

Your code is almost perfect apart from your printf line! The ", firstName" of that needs to be outside of the quotation marks. Once you have changed this all your errors should be gone!

Pierce Mulligan
Pierce Mulligan
1,106 Points

Thanks so much its working now.

Leen Leenaerts
Leen Leenaerts
1,096 Points
Leen Leenaerts
Leen Leenaerts
1,096 Points

that's what i commented before :)

Pierce Mulligan
Pierce Mulligan
1,106 Points

Yeah, thank you too. This is unrelated, but its there C# on this website. I've been looking all over and can't find it. That's the language I have to learn, but I've just been doing java because I hear they are very similar.

Luke Glazebrook
Luke Glazebrook
13,564 Points

Hi Pierce!

There currently aren't any C# lessons here on Treehouse but they will most likely be coming at some point in the future. You have heard right, as well, Java does have some similarities with Java. However, if you are learning C# for a job I would recommend that you just try and learn that.