circle2.java

JSP实用教程源代码 本书从开发实践出发

package com.bean;
import java.io.*;
public class Circle2  
{ double radius=1;
  double circleArea=0;
  double circleLength=0;
  public double getRadius()
     { return radius;
     }
  public void setRadius(double newRadius)
     {radius=newRadius;
     }
  public double getCircleArea()
     {circleArea=Math.PI*radius*radius;
      return circleArea;
     }
  public double getCircleLength()
     { circleLength=2.0*Math.PI*radius;
       return circleLength;
     }
}