Java How to Program Fourth Edition - DCC

Chapter 2 Introduction to Java Applications 99
b) Error: The relational operator => is incorrect.
Correction: Change => to >=.
2.5 a) // Calculate the product of three integers
b) int x, y, z, result;
c) String xVal, yVal, zVal;
d) xVal = JOptionPane.showInputDialog(
"Enter first integer:" );
e) yVal = JOptionPane.showInputDialog(
"Enter second integer:" );
f) zVal = JOptionPane.showInputDialog(
"Enter third integer:" );
g) x = Integer.parseInt( xVal );
h) y = Integer.parseInt( yVal );
i) z = Integer.parseInt( zVal );
j) result = x * y * z;
k) JOptionPane.showMessageDialog( null,
"The product is " + result );
l) System.exit( 0 );
2.6 The solution to Exercise 2.6 is as follows:
1 // Calculate the product of three integers
2
3 // Java extension packages
4 import javax.swing.JOptionPane;
5
6 public class Product {
7
8 public static void main( String args[] )
9 {
10 int x, y, z, result;
11 String xVal, yVal, zVal;
12
13 xVal = JOptionPane.showInputDialog(
14 "Enter first integer:" );
15 yVal = JOptionPane.showInputDialog(
16 "Enter second integer:" );
17 zVal = JOptionPane.showInputDialog(
18 "Enter third integer:" );
19
20 x = Integer.parseInt( xVal );
21 y = Integer.parseInt( yVal );
22 z = Integer.parseInt( zVal );
23
24 result = x * y * z;
25 JOptionPane.showMessageDialog( null,
26 "The product is " + result );
27
28 System.exit( 0 );
29 }
30 }
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