This assignment contains four classes.
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First class: GeometricObject
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Attributes:
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private String color;
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private double weight;
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Default constructor
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public GeometricObject( ) { color = “white”;weight = 1.0; }
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Another constructor
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public GeometricObject(String color, double weight)
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{ this.color = color; this.weight = weight; }
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Getters and setters
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public String getColor( ) { return color; }
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public void setColor( String color ) { this.color = color; }
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public double getWeight() { return weight; }
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public void setWeight( double weight ) { this.weight = weight;}
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Two methods to be overridden
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public double calculateArea();
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public double calculatePerimeter();
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Second class: Circle that extends the class GeometricObject to represent circles. You are asked to provide the overridden definitions of the two methods.
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public class Circle extends GeometricObject
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{
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private double radius;
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// Default constructor
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public Circle( ) {}
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// Construct circle with specified radius
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public Circle( double radius ) {}
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// Construct a circle with specified radius, weight, and color
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public Circle( String color, double weight, double radius ) {}
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// Getters and setters
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public double getRadius( ){}
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public void setRadius( double radius ){}
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Two overriding methods
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public double calculateArea() { };
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public double calculatePerimeter() {};
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}
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Third Class: Rectangle that extends the class GeometricObject to represent rectangles. You are asked to provide the overridden definitions of the two methods.
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public class Rectangle extends GeometricObject
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{
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private double width;
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private double height;
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// Default constructor
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public Rectangle ( ) {}
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// Another constructor with given parameters
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public Rectangle ( double width, double height, String color, String weight ) {};
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// Getters and setters for instance variables: width and height
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// Two overriding methods
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public double calculateArea() { };
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public double calculatePerimeter() {};
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}
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Fourth class:
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In the main program, use (one) super class reference and subclass objects to do the following:
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- Create two different Circle objects using the two respective constructors, and then let these different objects call the overridden methods to display their areas and perimeters respectively.
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- Create two different Rectangle objects using the two respective constructors, and then let these different objects call the overridden methods to display their areas and perimeters respectively.
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