import java.io.*;

public class DataOutputStreamDemo {
    public static void main(String[] args) {
        File file=new File("f://file.txt");
        try {
            FileOutputStream fos=new FileOutputStream(file);
            DataOutputStream dos=new DataOutputStream(fos);
            int n=123;
            int i=1;
            /* for(i=0;i<=100;i++){
            dos.writeDouble(Math.random());
            dos.writeChars("\n");
            }*/
//            dos.writeInt(n);
            dos.writeBytes("123");
            dos.flush();
            dos.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}