import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
class CreateFile
{
public static void main(String[] args) throws IOException
{
FileInputStream fis = new FileInputStream("file.txt");
FileOutputStream fos = new FileOutputStream("file.txt");
BufferedInputStream reader = new BufferedInputStream(System.in);
byte[] b = null;
fos.write(b);
reader.read(b);
System.out.println(b);
}
}
我不知道怎么改正?