import java.io.*;
public class Example
{  
   public static void main(String args[ ])
   { 
      File file=new File("hello.txt");
      byte b[]="歡迎welcome".getBytes();
      try{
           FileOutputStream  out=new  FileOutputStream(file);
           out.write(b);
           out.close();
           FileInputStream  in=new FileInputStream(file);
           int n=0;
           while((n=in.read(b,0,2))!=-1)
           {
               String str=new String(b,0,2);
               System.out.println(str);
           }
         }
      catch(IOException e)
         {
           System.out.println(e);
         }  
   }
}