定义一个图形类及其子类22

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

public class Sanjux {
        public double width;
public double length;
public double area;
public double Perimeter;
public double areaSanjux() {
return area;
}
public double PerimeterSanjux() {
return Perimeter;
}
}
class rectangle extends Sanjux {
public double areaGraphical() {
area = width * length;
return area;
}
public double PerimeterSanjux() {
Perimeter = (width + length) * 2;
return Perimeter;
}
}
class Triangle extends Sanjux {
public double high;
public double bottom;
public double side;
public double areaSanjux() {
area = (bottom * high) / 2;
return area;
}
public double PerimeterSanjux() {
Perimeter = high + bottom + side;
return Perimeter;
}
}
public class Graphical {

public static void main(String[] args) {
rectangle A1 = new rectangle();// 声明对象和创建对象
A1.width = 10;
A1.length = 20;
A1.areaGraphical();
A1.PerimeterSanjux();
System.out.println("矩形面积:" + A1.areaSanjux() + "矩形周长:" + A1.PerimeterSanjux());//输出
Triangle A2 = new Triangle();// 声明对象和创建对象
A2.high = 5;
A2.side = 10;
A2.bottom = 6;
A2.areaSanjux();
A2.PerimeterSanjux();
System.out.println("三角形面积:" + A2.areaSanjux() + "三角形周长:" + A2.PerimeterSanjux());//输出
}
}