Write file using OneByte in java

import java.io.*;

/*
 * FileOutputStream fos;
 * BufferedOutputStream bos;
 * DataOutputStream dos;
 */


public class OneByteTest1 {
public static void main(String[] args) throws Exception {
FileOutputStream fos1 = new FileOutputStream(FileDescriptor.out); //stdout
File f = new File("C:\\FileTest\\bbb.txt");

FileOutputStream fos2 = new FileOutputStream(f,true); //file writing

byte[] by = new byte[]{'H','E','L','L','O',' ','J','A','V','A'};
fos1.write(by);
fos1.write(10);
fos1.write(by,6,4);
fos1.write(10);
fos1.write(65);

fos2.write(by);

fos1.close();
fos2.close();



}

}