CSC1110 - Week 7 Exercise

Instructions

Implement the following classes based on their UML and descriptions. At the end, are the sample outputs from two separate runs.

Point

Point
-x:double {readOnly} -y:double {readOnly}
+Point(x:double,y:double) +getX():double +getY():double

This class represent a Point is 2D space that posses an (x,y) value.

Rectangle

Rectangle
-upperLeft:Point {readOnly} -width:double {readOnly} -height:double {readOnly}
+Rectangle(width:double, height:double, x:double, y:double) +hit(testPoint: Point):boolean +display():void -getLowerRightCorner():Point

This class represents a Rectangle that has a width and height, but also a Point that represents the location of the upper left-hand corner. The hit() method returns true if the passed-in x and y values passed in, fall within, but not on, the perimeter of the Rectangle. The display() method prints out "Rectangle", and then the x and y of the upper left-hand corner and the width and height. See the sample output.

RectangleDriver

RectangleDriver

+main(args:String[]) -makeRectangle(scan:Scanner):Rectangle -checkPoint(rec:Rectangle, scan:Scanner):void

This is the driver class and contains a main() and two helper methods.

The main() method creates a new Rectangle using the makeRectangle() method. It then calls the checkPoint() method with the Rectangle that was returned from makeRectangle().
The makeRectangle() method asks the user for the width and height of a Rectangle and the x and y of the upper left hand corner. This method then returns a new Rectangle using the values entered by the user.
The checkPoint() method asks the user for the x and y of a Point to check. It prints out whether the x and y locations enter fall inside the perimeter of the passed in Rectangle.

Sample Output 1

Enter the width: 4
Enter the height: 3
Enter the x of the top left corner: 0
Enter the y of the top left corner: 0
Rectangle: 
x:0.0,y:0.0
Width:4.0,Height:3.0
Enter the x of the Point you want to test: 1
Enter the y of the Point you want to test: -1
This point (1.0,-1.0) is within the Rectangle

Sample Output 2

Enter the width: 4
Enter the height: 3
Enter the x of the top left corner: 2
Enter the y of the top left corner: 3
Rectangle: 
x:2.0,y:2.0
Width:4.0,Height:3.0
Enter the x of the Point you want to test: 1
Enter the y of the Point you want to test: -1
This point (1.0,-1.0) is not within the Rectangle

Submission

See your professor's instructions for details on submission guidelines and due dates.