小编kum*_* TN的帖子

这是我的代码:

public class sample {
   public static void main(String []args) throws Exception {

      System.out.println("Enter from file:");

      BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\KK\\A Key.txt"));

      String currentline;

      while((currentline=br.readLine())!=null){

         System.out.println(currentline);
      }

      BigInteger a = new BigInteger(currentline); 

      System.out.println(a);

  }

我想从文本文档中读取,从字符串转换为大整数,我试过这个但是我得到一个运行时错误,如何将String转换为相应的大整数Ascii值.