import java.io.*;
public class Bwriter
{
public static void main(String args[]) throws Exception
{
InputStreamReader i=new InpytStreamReader(System.in);
BufferedReader b=new BufferedReader(i);
FileWriter w=new FileWriter("file1.txt");
BufferedWriter w=new BufferedWriter(f);
String s;
while(true)
{
System.out.print("input a string:");
System.out.flush();
s=b.readLine();
if(s.length()==0)
break; //如果用戶直接回車,代表結束
w.write(s);
w.newLine();
}
w.close( );
}
}