circle.java

《精通JSP编程 》源代码(赵强那本) 很有用的源代码

package edu.j2ee.jspexample;

public class Circle implements java.io.Serializable
{ double radius=1;
  double circleArea=0;
  double circleLength=0;
  public Circle() {
  	}
  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;
     }
}