circle.java

一个小小的javaBean程序：求圆的各种参数

import java.io.*;
public class Circle  
{ int radius;
  public Circle()
     { radius=1;
     }
  public int getRadius()
     { return radius;
     }
  public void setRadius(int newRadius)
     {radius=newRadius;
     }
  public double circleArea()
     {return Math.PI*radius*radius;
     }
  public double circlLength()
     {return 2.0*Math.PI*radius;
     }
}