// app8_13, 由method傳遞類類型的變量
class CCircle   // 定義類CCircle
{
   private static double pi=3.14;   
   private double radius;
 
   public CCircle(double r){ // CCircle構造函數
      radius=r;
   }
   public CCircle compare(CCircle cir){ // Compare() method
      if(this.radius>cir.radius) 
         return this;
      else
         return cir;      
   }         
}

public class app8_13
{
   public static void main(String args[])
   {
      CCircle cir1=new CCircle(1.0);
      CCircle cir2=new CCircle(2.0);
      CCircle obj;     
      obj=cir1.compare(cir2);
      if(cir1==obj)
         System.out.println("radius of cir1 is larger");
      else
         System.out.println("radius of cir2 is larger");
   }
}