1 using the basic MVC model to achieve the following figure shows the application, the program main functions are as follows:   (1) When the user enters a radius of the circle in the graphical user interface, the program will display the circumference and area of the circle and draw the circle (as shown in the figure) (2) When the user drags a ruler representing the radius of the circle on the graphical user interface, the radius, circumference and area of the circle are automatically displayed and the graph is drawn on the graphical interface (3) Assume that the program needs to be extended to a function that requires the surface area of the sphere to be displayed on the program interface, try to figure out how to implement this function, and implement this function.

MVC 画圆\.classpath
MVC 画圆\.project
MVC 画圆\.settings\org.eclipse.jdt.core.prefs
MVC 画圆\bin\Controller.class
MVC 画圆\bin\Model.class
MVC 画圆\bin\SOAPService.class
MVC 画圆\bin\View$MyCanvas.class
MVC 画圆\bin\View.class
MVC 画圆\src\Controller.java
MVC 画圆\src\Model.java
MVC 画圆\src\SOAPService.java
MVC 画圆\src\View.java
MVC 画圆\.settings
MVC 画圆\bin
MVC 画圆\src
MVC 画圆

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