Question

I am new to java and netbeans. I am trying to write a program that requires user input. This is my code:

public class Arrays {

  public static void main(String[] args){
  }

  private double[] readNumbers(){
      final Input in = new Input();
      System.out.print("How many numbers will you enter?: ");
      final int count = in.nextInt();
      final double[] list = new double[count];
      for (int i = 0; i < count; ++i){
          System.out.print("Enter next number: ");
          list[i] = in.nextDouble();
      }
      return list;
  }
}

In line final Input in - new Input(); Netbeans underlines Input saying that it cannot find symbol. However I practically copied this code from the textbook so I don’t understand what the problem is. I thought maybe I needed to import java.io, but that did not solve the problem. Really sorry if this is a stupid question, but any help would be really appreciated.

Thank you!

Answer 1

Looks like your text book has some class definition that you forgot to import to your project.
If you like to , change your code like,

final Input in = new Input();

to

final Scanner in = new Scanner(System.in);

If you don’t want to change your code, then look few pages up and down the pages from where you got this code, you should see Class named Input , some what similar to this :

class Input{

    public int nextInt(){
         Scanner sc=new Scanner(System.in);
         return sc.nextInt();
    }

    public double nextDouble(){
         Scanner sc=new Scanner(System.in);
         return sc.nextDouble();
    }

}

Which is basically, an extra unnecessary work.
Include that in your project, and it should run fine.