JAVA中的继承和多态问题，问题解决再多加50财富，谢谢！ 要求利用继承和多态的知识设计一组用于图形处理的

JAVA中的继承和多态问题，问题解决再多加50财富，谢谢！ 要求利用继承和多态的知识设计一组用于图形处理的

MyCircle文件

import static java.lang.Math.*;

public class MyCircle extends MyShape {
private double radius;

@Override
public double getS() {
return PI * pow(radius, 2);
}

@Override
public double getL() {
return 2 * PI * radius;
}

public double get_radius() {
return radius;
}

public void set_radius(double radius) {
this.radius = radius;
}

public static void main(String[] args) {
}

@Override
public void showInfo() {
System.out.println("this is a MyCircle!");
}
}

MyRectangle文件
public class MyRectangle extends MyShape {
private double length;
private double width;

@Override
public double getS() {
return length * width;
}

@Override
public double getL() {
return (length + width) * 2;
}

public double get_length() {
return length;
}

public void set_length(double width) {
this.width = width;
}

public double get_width() {
return width;
}

public void set_width(double width) {
this.width = width;
}

@Override
public void showInfo() {
System.out.println("this is a MyRectangle!");
}
}

MyShape文件

public abstract class MyShape implements ShowShape {
public abstract double getS();
public abstract double getL();

}

ShowShape文件
public interface ShowShape {
public void showInfo();
}

TestMyShape文件

public class TestMyShape {
public static void main(String[] args) {
MyCircle myCircle=new MyCircle();
MyRectangle myRectangle=new MyRectangle();
myCircle.showInfo();
myCircle.set_radius(10);
myCircle.getL();
myCircle.getS();
myRectangle.showInfo();
myRectangle.set_length(10);
myRectangle.set_width(10);
myRectangle.getL();
myRectangle.getS();
}

}

abstract class MyShape{
abstract double area();//求面积
abstract double perimeter();//求参数
}
interface ShowShape{
void show();
}
class MyCircle extends MyShape implements ShowShape{
double radius;
double get_radius(){return radius;}
void set_radius(double r){radius=r;}
double area() {return 3.1415926*radius*radius;}
double perimeter() {return 2*3.1415926*radius;}
public void show(){System.out.println(
"圆的半径为"+radius+",面积为"+area()+",周长为"+perimeter());}
}
class MyRectangle extends MyShape implements ShowShape{
double length,width;
double get_length(){return length;}
void set_length(double l){length=l;}
double get_width(){return width;}
void set_width(double w){width=w;}
double area() {return length*width;}
double perimeter() {return 2*(length+width);}
public void show(){System.out.println(
"矩形的长为"+length+",宽为"+width+",面积为"+area()+",周长为"+perimeter());}
}
public class TestMyShape {
public static void main(String[] args) {
MyCircle circle=new MyCircle();
MyRectangle rect=new MyRectangle();
circle.set_radius(10);
System.out.println(circle.get_radius());
rect.set_length(15);
rect.set_width(10);
System.out.println(rect.get_length());
System.out.println(rect.get_width());
circle.show();
rect.show();
}
}

abstract class MyShape implements ShowShape {
abstract public double getArray();
abstract public double getPerimeter();
abstract public void showPic();
}
class MyCircle extends MyShape {
private double radius;
public double getArray() {
return Math.PI * Math.pow(get_radius(),2);
}
public double getPerimeter() {
return 2 * Math.PI * get_radius();
}
public double get_radius() {
return this.radius;
}
public void set_radius(double radius) {
this.radius = radius;
}
public void showPic() {
System.out.println("圆半径："+get_radius()+",周长："+getPerimeter()+",面积："+getArray());
}
}
class MyRectangle extends MyShape {
private double length;
private double width;
public double get_length() {
return this.length;
}
public void set_length(double length) {
this.length = length;
}
public double get_width() {
return this.width;
}
public void set_width(double width) {
this.width = width;
}
public double getArray() {
return get_width() * get_length();
}
public double getPerimeter() {
return 2 * (get_width() + get_length());
}
public void showPic() {
System.out.println("长方形长："+get_length()+",宽："+get_width()+",周长："+getPerimeter()+",面积："+getArray());
}
}
interface ShowShape {
public void showPic();
}
public class TestMyShape {
public static void main(String[] args) {
MyRectangle mr = new MyRectangle();
MyCircle mc = new MyCircle();
mr.set_width(1);
mr.set_length(2);
mc.set_radius(3);

mr.showPic();
mc.showPic();
}
}