public static void main(String[] args) {
Object[] objects = {new Triangle(5, 5), new Square(3), new Circle(3)};
// compute areas
for (Object o : objects) {
if (o instanceof Triangle) {
Triangle t = (Triangle) o;
System.out.println(t.computeArea());
}
if (o instanceof Square) {
Square s = (Square) o;
System.out.println(s.computeArea());
}
if (o instanceof Circle) {
Circle c = (Circle) o;
System.out.println(c.computeArea());
}
}
}
// App class constructor
public App() {
// Print out a test message to the console to confirm running program
// Uses java.lang library System.out to do priting to console
System.out.println("App constructor success!");
// Delare and instantiate objects
MainWindow myWindow = new MainWindow();
InputBox inBox = new InputBox(myWindow);
OutputBox outBox = new OutputBox(myWindow);
// Render the main window
myWindow.show();
// Declare and initialise variables to default values
double baseDimension = -1;
double heightDimension = -1;
double area = -1;
// Get input form the user
baseDimension = inBox.getDouble("Please enter the size of the base in mm: ");
heightDimension = inBox.getDouble("Please enter the height in mm: ");
// Debug output
System.out.println("The base entered was: " + baseDimension);
System.out.println("The height entered was: " + heightDimension);
// Create the Triangle object
Triangle myTriangle = new Triangle();
// Set values from user
myTriangle.setBaseDimension(baseDimension);
myTriangle.setHeightDimension(heightDimension);
// Calculate the area
myTriangle.computeArea();
area = myTriangle.getArea();
// Show the feedback dialog
outBox.show();
// Return the calculated area
outBox.println("The triangle area was computed to be: " + area);
}
public static void main(String[] args) {
Object[] objects = {new Triangle(5, 5), new Square(3), new Circle(3)};
// compute areas
for (Object o : objects) {
if (o instanceof Triangle) {
System.out.println("The name of the class is : " + o.getClass().getSimpleName());
Triangle t = (Triangle) o;
System.out.println("Area of Triangle : " + t.computeArea());
}
if (o instanceof Square) {
System.out.println("The name of the class is : " + o.getClass().getName());
Square s = (Square) o;
System.out.println("Area of Rectangle : " + s.computeArea());
}
if (o instanceof Circle) {
Circle c = (Circle) o;
System.out.println("The name of the class is : " + o.getClass());
System.out.println("Area of Circle : " + c.computeArea());
}
}
}
