Re: Is there a DataOutput buffer in Java?

From:

Knute Johnson <nospam@rabbitbrush.frazmtn.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 14 Dec 2006 19:03:40 -0800

Message-ID:

<lgogh.52777$xM4.24680@newsfe07.phx>

Bryan wrote:

Hi Knute,

I'm sending mainly ints and floats. I tried the System.out method, but
since DataOutput writes the actual bytes of the data passed to it not
much shows up on the screen when I print smaller int values since most
of the lower ascii values are unprintable. What I'd really like to be
able to do is write to some sort of catch-all buffer where I could then
get the contents of the buffer and print the values in a hex
representation.

Try this:

import java.io.*;

public class test {
     public static void main(String[] args) throws Exception {
         ByteArrayOutputStream baos = new ByteArrayOutputStream();
         DataOutputStream dos = new DataOutputStream(baos);

         dos.writeInt(1234);
         dos.writeInt(2);
         dos.writeInt(65535);
         dos.writeFloat(1.234f);
         dos.writeDouble(1234.5);

         dos.flush();
         dos.close();

         byte[] buf = baos.toByteArray();
         for (int i=0; i<buf.length; i++)
             System.out.print(String.format("%02X ",buf[i]));
     }
}

knute...