Scanner: hasNextDouble() : Scanner « java.util « Java by API

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2. java.util
3. Scanner

Scanner: hasNextDouble()

 
/**
 *Output:

 */

import java.util.Scanner;

public class MainClass {
  public static void main(String args[]) {
    Scanner conin = new Scanner(System.in);

    int count = 0;
    double sum = 0.0;

    System.out.println("Enter numbers to average.");

    while (conin.hasNext()) {
      if (conin.hasNextDouble()) {
        sum += conin.nextDouble();
        count++;
      } else {
        String str = conin.next();
        if (str.equals("done"))
          break;
        else {
          System.out.println("Data format error.");
          return;
        }
      }
    }

    System.out.println("Average is " + sum / count);
  }
}

           
         
  

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