Java formatted IO: Use Scanner to compute an average of the values.

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);
  }
}

1.	Formatted Input output: A very simple example that uses Formatter.
2.	Demonstrate the format specifier.
3.	Formatting time and date.
4.	Demonstrate the format specifiers 2.
5.	Demonstrate a field-width specifier.
6.	Java Formatter: Create a table of squares and cubes.
7.	Java formatted IO: the precision modifier.
8.	Java formatted IO: the left justification.
9.	Java formatted IO: the space format specifiers.
10.	Use arguments indexes to simplify the creation of a custom time and date format.
11.	Java formatted IO: Demonstrate printf().
12.	Java formatted IO: Use Scanner to compute an average of the values in a file.
13.	Use Scanner to read various types of data from a file.
14.	Use Scanner to compute an average a list of comma-separated values.
15.	Java formatted IO: findInLine().
16.	Java new formatted IO : format tester

Java formatted IO: Use Scanner to compute an average of the values. : Formatted IO « Language Basics « Java

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