//Sample01_02.java

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

class Sample01_02{

  public static void main(String[] args){

    String path = "hello.txt";
    File file = new File(path);

    try {

      FileOutputStream outStream = new FileOutputStream(file);
      int intCh = 'あ';
      System.out.println(String.format("あ: %x",  intCh));
      outStream.write(intCh);

      byte byteData = (byte)intCh;
      System.out.println(String.format("(byte)あ: %x", byteData));
      System.out.println((char)byteData);

      outStream.close();

    } catch (FileNotFoundException e) {
      e.printStackTrace();
    } catch (IOException e){
      e.printStackTrace();
    }
  }
}