面积之和java代码

Geometry.java

public abstract class Geometry { 
	public abstract double getArea();
	}

TotalArea.java

public class TotalArea {
	Geometry[] tuxing;
	double totalArea=0; 
	public void setTuxing(Geometry[] t) {
		tuxing=t;
		}
	public double computerTotalArea() {
		for(int i=0;i 
Rect.java
 
public  class Rect extends Geometry {
	double a,b; 
	Rect(double a,double b) { 
		this.a = a; 
		this.b = b; 
		}
public double getArea(){
	return a*b;
}
}
 
Circle.java
 
public class Circle extends Geometry {
	double r; 
	Circle(double r) {
		this.r = r; 
		}
	public double getArea(){
		return 3.14*r*r;
	}
}
 
MainClass.java
 
public class MainClass{ 
	public static void main(String args[]) {
		Geometry [] tuxing=new Geometry[29]; 
		for(int i=0;i 
运行结果：