Chapter 13, Problem 2SA

Program Plan Intro

Shape class:

• The basic functionality for drawing shapes is included in “Shape” class.
• A specific shape is been drawn by each of the subclasses in “Shape” class.
• The “Shape” class is present in JavaFX library.
• The lines are been drawn using “Line” class.
• The circles are been drawn using “Circle” class.
• The “Shape” class as well as its subclasses is present in “javafx.scene.shape” package.
• The JavaFX library holds “Shape” class that provides features for drawing shapes.
• The subclasses present in “Shape” includes:
  • Line:
    • It can draw a line from a point to another.
  • Circle:
    • It can draw a circle with a specific center as well as radius.
  • Rectangle:
    • It can draw a rectangle with specific height as well as width.
  • Ellipse:
    • It can draw an ellipse with a center point as well as radii.
  • Arc:
    • It draws an arc that denotes a partial ellipse.
  • Polygon:
    • It draws a polygon with vertices at particular locations.
  • Polyline:
    • It draws a polyline with vertices at particular locations.
  • Text:
    • It draws a string at a particular location.
• The package used for “Shape” class as well as its subclasses is “javafx.scene.shape”.

Example:

The example for “Ellipse” class is given below:

Ellipse elp = new Ellipse(320, 240, 140, 100);

Here, “elp” denotes an object of “Ellipse” class. The given code generates an ellipse with given dimensions. The coordinates (140, 100) denotes X and Y coordinates respectively.