How do I use java.util.Scanner with integers

Question

I just started learning java and I want to make a simple program where it requests the persons name, outputs the name then asks for the thier favorite number. It will then compare their number to the number 6 and will output something depending on if the number is larger or smaller than 6.

I am getting a "String to int convert" error in Netbeans which has to do with the scanner. Hopefully I am asking this correctly but how can I make the scanner pick-up integers? Thanks

package javaapplication2; import java.util.Scanner; import java.lang.String; public class JavaApplication2 { public static void main(String[] args) { // Creating an instance of the scanner class. // Gets name and numbers. Scanner getName = new Scanner(System.in); Scanner getNumber = new Scanner(System.in); //Holds name and number String userName; int userNumber; // Asks for the users name. // Holds name in userName. System.out.println("What is your name?"); userName = getName.nextLine(); //Reponds with the users name. System.out.println("Hello" + userName + "!"); //Asks for favorite number. // Holds number in userNumber. System.out.println("What is your favorite number?"); userNumber = getNumber.nextLine(); // Checks if users number is larger than 6. if (userNumber > 6) { // Stuff goes here. } } }

In order to learn Java API, you must have documentation - docs.oracle.com/javase/8/docs/api/java/util/Scanner.html — KV Prajapati
– KV Prajapati, Commented Oct 4, 2014 at 8:34

Dmitry Ginzburg · Accepted Answer · 2014-10-04 08:33:52Z

6

You should use only one Scanner for one input stream:

Scanner in = new Scanner(System.in);

And after that you should use it's methods to get integers:

String name = in.nextLine(); int number = in.nextInt();

To be sure, you should read the documentation for Scanner:

answered Oct 4, 2014 at 8:33

Dmitry Ginzburg

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2 Comments

user3728587 Over a year ago

Oh! I didnt know I could use one scanner as one input stream for all. Thanks

user3728587 Over a year ago

Need to wait 8 minutes. Thanks a lot though. I probably should read the docs. Im just reading a random Java book I have and looking at some code then changing it.

Isaac Woods · Accepted Answer · 2014-10-04 08:35:17Z

0

This might help: Javadoc page for Scanner.

answered Oct 4, 2014 at 8:35

Isaac Woods

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3 Comments

Dmitry Ginzburg Over a year ago

Just pointing the documentation is OK for comments, but is not real answer.

Isaac Woods Over a year ago

I believe it is an answer. I checked for the answer to the OP's question on the page - having to work it out themselves given the documentation is beneficial for answering their own questions in the future. Is it a followed convention to not provide documentation in an answer, or what?

Dmitry Ginzburg Over a year ago

Yes, it is, you can give link to documentation in a comment, if you like (when you have enough reputation)

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