import java.io.*;

public class TestDataStream {

  public static void main(String[] args) {

    ByteArrayOutputStream baos =

                        new ByteArrayOutputStream();

    DataOutputStream dos =

                        new DataOutputStream(baos);

    try {

      dos.writeDouble(Math.random());

      dos.writeBoolean(true);

      ByteArrayInputStream bais =

          new ByteArrayInputStream(baos.toByteArray());

      System.out.println(bais.available());

      DataInputStream dis = new DataInputStream(bais);

      System.out.println(dis.readDouble());

      System.out.println(dis.readBoolean());

      dos.close();  dis.close();

    } catch (IOException e) {

      e.printStackTrace();

    }

  }

}