class Circleextends Shape{ //注:圆周率π=3private double r; //r表示圆的半径;/* 请补充完整 */private double area=Math.PI*r*r;private String getName() {return "Circle";}}class Rectangleextends Shape{p... 解析看不懂?免费查看同类题视频解析查看解答 相似问题 用JAVA写一个程序,求N个不同...
public class Rectangle extends Shape { public void draw() { System.out.println(Drawing a rectangle); } } public class Main { public static void main(String[] args) { Shape shape1 = new Circle(); Shape shape2 = new Rectangle(); shape1.draw(); shape2.draw(); } } ``` 以上代码中...
注:接口类继承用:implements,抽象类等类继承用:extends;接口可以继承多个用“,”隔开,但抽象类等类只能继承一个; 代码: packageabstract_and_interfaces; //抽象类 publicabstractclassShape { abstractpublicvoidshowArea();//用来计算并显示面积 } //矩形类继承抽象类 publicclassRectangleextendsShape{ privatedouble...
java.lang.Object | +---java.awt.Rectangle public class Rectangle** extends Object implements Shape, Serializable A rectangle specifies an area in a coordinate space that is defined by the rectangle's top-left point (x, y) in the coordinate space, its width, and its height. A rectangle...
给定以下代码,classShape{/*...*/}classCircleextendsShape{/*...*/}classRectangleextendsShape{/*...*/}classNode{/*...*/}那以下代码可以编译通过。Nodenc=newNode();Nodens=nc;查看答案更多“给定以下代码,classShape{/*...*/}classCircleextendsShape{/*...*/}classRectangleextendsShape{/*...*...
Class Rectangle All Implemented Interfaces: Shape,Serializable,Cloneable public classRectangleextendsRectangle2DimplementsShape,Serializable See Also: Serialized Form Nested Class Summary Nested classes/interfaces inherited from class com.itextpdf.awt.geom.Rectangle2D ...
RectangleStylusShape(Double, Double) Initializes a new instance of theRectangleStylusShapeclass with the specified width and height. Properties Height Gets the height of the stylus. (Inherited fromStylusShape) Rotation Gets the angle of the stylus. ...
Use Shape Text Rectangle. This class is available in Office 2007 and above. When the object is serialized out as xml, it's qualified name is a:useSpRect.
RectangularShape java.awt.geom Class RectangularShape All Implemented Interfaces: Shape,Cloneable Direct Known Subclasses: Arc2D,Ellipse2D,Rectangle2D,RoundRectangle2D public abstract classRectangularShapeextendsObjectimplementsShape,Cloneable RectangularShapeis the base class for a number ofShapeobjects whose ...
题目声明一个图形基类Shape,在它的基础上派生出矩形类Rectangle和圆形类Circle,它们都有计算面积的和周长、输出图形信息的成员函数,再在Rectangle类的基础上派生方形类Square。编写程序和各类的定义和实现,以及类的使用。解:#include using namespace std;class Shape {public:double getArea(){}...