Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

11.2 Superclasses and Subclasses 409
GeometricObject
-color: String
-filled: boolean
-dateCreated: java.util.Date
+GeometricObject()
+GeometricObject(color: String,
filled: boolean)
+getColor(): String
+setColor(color: String): void
+isFilled(): boolean
+setFilled(filled: boolean): void
+getDateCreated(): java.util.Date
+toString(): String
The color of the object (default: white).
Indicates whether the object is filled with a color (default: false).
The date when the object was created.
Creates a GeometricObject.
Creates a GeometricObject with the specified color and filled
values.
Returns the color.
Sets a new color.
Returns the filled property.
Sets a new filled property.
Returns the dateCreated.
Returns a string representation of this object.
-radius: double
Circle
+Circle()
+Circle(radius: double)
+Circle(radius: double, color: String,
filled: boolean)
+getRadius(): double
+setRadius(radius: double): void
+getArea(): double
+getPerimeter(): double
+getDiameter(): double
+printCircle(): void
-width: double
-height: double
Rectangle
+Rectangle()
+Rectangle(width: double, height: double)
+Rectangle(width: double, height: double
color: String, filled: boolean)
+getWidth(): double
+setWidth(width: double): void
+getHeight(): double
+setHeight(height: double): void
+getArea(): double
+getPerimeter(): double
FIGURE 11.1
The GeometricObject class is the superclass for Circle and Rectangle.
SimpleGeometricObject, CircleFromSimpleGeometricObject, and
RectangleFromSimpleGeometricObject in this chapter. For simplicity, we will
still refer to them in the text as GeometricObject, Circle, and Rectangle
classes. The best way to avoid naming conflicts is to place these classes in different
packages. However, for simplicity and consistency, all classes in this book are placed in
the default package.
LISTING 11.1
SimpleGeometricObject.java
1 public class SimpleGeometricObject {
2 private String color = "white";
3 private boolean filled;
4 private java.util.Date dateCreated;
5
6 /** Construct a default geometric object */
7 public SimpleGeometricObject() {
8 dateCreated = new java.util.Date();
data fields
constructor
date constructed