定义一个图形类及其子类（三角形类和矩形类），分别计算其面积和周长

//定义一个图形类及其子类（三角形类和矩形类），分别计算其面积和周长。
class Graphical{  //父类

public double Length;
public double Width;
public double Perimeter;
public double area;
public double areaGraphical() {  //成员方法

return area;
}
public double PerimeterGraphical() {

return Perimeter;
}
}
class Triangle extends Graphical {  //Graphical的子类Triangle

public double high;
public double bottom;
public double side;
public double areaGraphical() {

area = (bottom * high) / 2;
return area;

}
public double PerimeterGraphical() {

Perimeter = high + bottom + side;
return Perimeter;

}
}
class rectangle extends Graphical{

public double areaGraphical() {

area = Width * Length;

return area;

}
public double PerimeterGraphical() {

Perimeter = (Width + Length) * 2;

return Perimeter;
}

}
public class GRA { 

public static void main(String[] args) {

Triangle p1= new Triangle(); //构建方法并对对象赋值
p1.high = 6;
p1.side = 10;
p1.bottom = 8;
p1.areaGraphical();
p1.PerimeterGraphical();
System.out.println("三角形面积:" + p1.areaGraphical() + "三角形周长:" + p1.PerimeterGraphical()); //输出


rectangle p2= new rectangle(); //构建方法并对对象赋值
p2.Width = 4;
                p2.Length = 8;

p2.areaGraphical();

         p2.PerimeterGraphical();

System.out.println("矩形面积:" + p2.areaGraphical() + "矩形周长:" + p2.PerimeterGraphical()); //输出
// TODO Auto-generated method stub

}
}