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下面程序是從命令窗口界面輸入圓半徑，然后計算球圓面積與周長。把劃線部分填上語句，將程序補充完整。

  import java.io.*;

  public class Qiumianji

  {

         public static void main (String args[ ])

           {

                    int a = 0;

                    double b,c;

                    Sting s;

                    try{

                          BufferedReader br =new BufferedReader (new InputStreamReader (___【1】__))；

                          s = br.readLine();

                          a = __【2】__;

                    }

                    catch(IOExcepion e)

                    {}

                    b = 3.14*a*a;

                    c = 2*3.14*a;

                    System.out.println(”該圓面積為”+b+””+”周長為”+c);

               }

}