Console Input and Output - Absolute Java - page 77

Display 2.6 Keyboard Input Demonstration

1 import java.util.Scanner;

Makes the Scanner class available
to your program.

2 public class ScannerDemo
3 {
4 public static void main(String[] args)
5 {
6 Scanner keyboard = new Scanner(System.in);

Creates an object of the class
Scanner and names the
object keyboard .

7 System.out.println("Enter the number of pods followed by");
8 System.out.println("the number of peas in a pod:");
9 int numberOfPods = keyboard.nextInt();
10 int peasPerPod = keyboard.nextInt();

Each reads one int
from the keyboard

11 int totalNumberOfPeas = numberOfPods*peasPerPod;

12 System.out.print(numberOfPods + " pods and ");
13 System.out.println(peasPerPod + " peas per pod.");
14 System.out.println("The total number of peas = "
15 + totalNumberOfPeas);
16 }
17 }

Sample Dialogue 1

Enter the number of pods followed by
the number of peas in a pod:
22 10
22 pods and 10 peas per pod.
The total number of peas = 220

The numbers that
are input must be
separated by
whitespace, such as
one or more blanks.

Sample Dialogue 2

Enter the number of pods followed by
the number of peas in a pod:
22
10
22 pods and 10 peas per pod.
The total number of peas = 220

A line break is also
considered whitespace and
can be used to separate the
numbers typed in at the
keyboard.