Question

I am using an ObjectOutputStream to send a large object (possibly a Map) to the server using my Swing application, Is there anyway to monitor the percentage sent etc as in a file upload.

Answer 1

You could serialize your object to a byte array, like this (incomplete, credit http://www.exampledepot.com/egs/java.io/SerializeObj.html):

// Serialize to a byte array
ByteArrayOutputStream bos = new ByteArrayOutputStream();
out = new ObjectOutputStream(bos);
out.writeObject(object); 
out.close(); 

// Get the bytes of the serialized object
byte[] buf = bos.toByteArray(); 

Then send the bytes to the server, one segment at a time. This way you’ll always know what percentage of the total has been sent. On the other side, you’ll have to reconstruct your object.