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Java Java Objects Meet Objects Final

Posted by Thomas Verst
Thomas Verst
725 Points

Why doesn't this method work?

public class test {

public static void main(String[] args) { String head = System.out.readLine("What character do you want? "); System.out.printf("We are making a new PEZ Dispenser"); System.out.printf("The dispenser is %s", head); } }

4 Answers

Gabe Olesen
Gabe Olesen
1,606 Points
Gabe Olesen
Gabe Olesen
1,606 Points

Hi Thomas!

Your code: 

public class test {

public static void main(String[] args) { 

String head = System.out.readLine("What character do you want? "); 

System.out.printf("We are making a new PEZ Dispenser"); 

System.out.printf("The dispenser is %s", head); 

   }
}

The line that's having issues is:

String head = System.out.readLine("What character do you want? ");

I assume in your code you've imported one of the below: 

import java.io.Console; 

import java.util.Scanner;

For the above line to work and call the "readLine" or "nextLine" method on the Console or Scanner class you will need to do the following: 

import java.io.Console; 

public class test {

public static void main(String[] args) { 

Console console = System.console() 

String head = console.readLine("What character do you want? "); 
}
}

The above will print "What character do you want" on the command line then prompt the user to enter in the character. 

import java.util.Scanner; 

public class test {

public static void main(String[] args) { 

Scanner scanner = new Scanner(System.in)

System.out.print("What character do you want? ");
String head = scanner.nextLine();  
}
}

I hope this makes sense!

~Gabe

Thomas Verst
Thomas Verst
725 Points

Thanks!! It was very helpful!! Just one question, how did you send me the code like that? I mean, with the dark background, colors and stuff...?

Thomas Verst
Thomas Verst
725 Points

For what do I need the scanner actually? My code works totally fine without it...

import java.io.Console; 

public class test {

public static void main(String[] args) { 

Console console = System.console();

String head = console.readLine("What character do you want? "); 
  console.printf("Your Dispenser %s is beeing made! %n", head);
}
} ```
Gabe Olesen
Gabe Olesen
1,606 Points
Gabe Olesen
Gabe Olesen
1,606 Points

No problem!

If you look just below where you type an answer you'll see:

"Reference this Markdown Cheatsheet for syntax examples for formatting your post."

Click onto: Markdown Cheatsheet for the syntax

Gabe Olesen
Gabe Olesen
1,606 Points
Gabe Olesen
Gabe Olesen
1,606 Points

Hey Thomas,

You don't need to use the Scanner, it's just another way of obtaining user input, that's why I gave both examples.

Hope this helped!

Nikola Vichev
Nikola Vichev
1,668 Points
Nikola Vichev
Nikola Vichev
1,668 Points

I'm writing the code exactly as it is in the video (at least I think so) and it just won't work ...help, please

public class Example {

public static void main(String[] args) { System.out.println("We are making a new PEZ Dispenser"); PezDispenser dispenser = new PezDispenser("Yoda");

System.out.printf("The dispenser is %s %n",
                  dispenser.getCharacterName()
                 );

String before = dispenser.swapHead("Darth Vader"); System.out.printf("It was %s but Chris switched it to %s %n, before, dispenser.getCharacterName());
} }

...and I'm getting

Example.java:13: error: ';' expected
dispenser.getCharacterName()
^
Example.java:13: error: ';' expected
dispenser.getCharacterName()
^