Java Reference
In-Depth Information
GeometricObject
-color: String
-filled: boolean
-dateCreated: java.util.Date
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.
+GeometricObject()
Creates a
GeometricObject
.
+GeometricObject(color: String,
filled: boolean)
+getColor(): String
+setColor(color: String): void
+isFilled(): boolean
+setFilled(filled: boolean): void
+getDateCreated(): java.util.Date
+toString(): String
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.
Circle
Rectangle
-radius: double
-width: double
-height: double
+Circle()
+Circle(radius: double)
+Circle(radius: double, color: String,
filled: boolean)
+getRadius(): double
+Rectangle()
+Rectangle(width: double, height: double)
+Rectangle(width: double, height: double
color: String, filled: boolean)
+getWidth(): double
+setRadius(radius: double): void
+getArea(): double
+setWidth(width: double): void
+getPerimeter(): double
+getDiameter(): double
+getHeight(): double
+setHeight(height: double): void
+printCircle(): void
+getArea(): double
+getPerimeter(): double
F
IGURE
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 topic are placed in
the default package.
L
ISTING
11.1
SimpleGeometricObject.java
1
public class
SimpleGeometricObject {
2
private
String color =
"white"
;
data fields
3
private boolean
filled;
4
private
java.util.Date dateCreated;
5
6
/** Construct a default geometric object */
7
public
SimpleGeometricObject() {
constructor
date constructed
8
dateCreated =
new
java.util.Date();
