public class SY63 {

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

         System.out.print("请输入字符串:");

         Scanner in = new Scanner(System.in);

         String st = in.nextLine();

         FileWriter fw = new FileWriter("d:\\test.txt");

         fw.write(st);

         fw.close();

         FileReader fr = new FileReader("d:\\test.txt");

         char[] bchar= new char[1024];

         int len = 0;

         while((len = fr.read(bchar)) != -1){

             System.out.print(new String(bchar,0,len));

         }

         fr.close();

     }

 }