Java Serializable Object to Byte Array

Question

Let's say I have a serializable class AppMessage.

I would like to transmit it as byte[] over sockets to another machine where it is rebuilt from the bytes received.

How could I achieve this?

Answer 1

Prepare the byte array to send:

ByteArrayOutputStream bos = new ByteArrayOutputStream(); ObjectOutputStream out = null; try {   out = new ObjectOutputStream(bos);      out.writeObject(yourObject);   out.flush();   byte[] yourBytes = bos.toByteArray();   ... } finally {   try {     bos.close();   } catch (IOException ex) {     // ignore close exception   } } 

Create an object from a byte array:

ByteArrayInputStream bis = new ByteArrayInputStream(yourBytes); ObjectInput in = null; try {   in = new ObjectInputStream(bis);   Object o = in.readObject();    ... } finally {   try {     if (in != null) {       in.close();     }   } catch (IOException ex) {     // ignore close exception   } }