열혈강의 자바 454쪽

import java.io.*;

public class Mains
{
 public static void main(String[] args) throws IOException
 {
  DataOutputStream dos1 =
   new DataOutputStream(
    new BufferedOutputStream(
     new FileOutputStream(
       new File(new File("c:\\java"), "abc.txt"))));
  dos1.writeInt(23);
  dos1.writeDouble(12.345);
  dos1.writeBytes("ABCDEFG!!");
  dos1.close();
 }
}