CONTROL STRUCTURES I: SELECTION - Java Programming: From Problem Analysis to Program Design - page 242

public class Ch4_PrExercise4
{
public static void main(String[] args)
{
System.out.print("Enter the shape type: (rectangle, "
+" circle, cylinder) ");
shape = console.next();
System.out.println();
String shape
if (shape.compareTo("rectangle") == 0)
{
System.out.print("Enter the height of the cylinder: ");
height = console.nextDouble();
System.out.println();
System.out.print("Enter the width of the rectangle: ");
width = console.nextDouble();;
System.out.println();
System.out.printf("Area of the circle = %.2f%n",
(PI * Math.pow(radius, 2.0)));
System.out.printf("Perimeter of the rectangle = %.2f%n",
(2 * (length + width)));
}
double length;
double width;
else if (shape.compareTo("circle") == 0)
{
System.out.print("Enter the length of the rectangle: ");
length = console.nextDouble();;
System.out.println();
System.out.printf("Volume of the cylinder = %.2f%n",
(PI * Math.pow(radius, 2.0)* height));
System.out.printf("Circumference of the circle: %.2f%n",
(2 * PI * radius));
}
else if (shape.compareTo("cylinder") == 0)
{
double height;
double radius;
System.out.print("Enter the radius of the circle: ");
radius = console.nextDouble();;
System.out.println();
System.out.print("Enter the radius of the base of "
+ "the cylinder: ");
radius = console.nextDouble();