there are a number of ways u can do this. u may use socket/streams.
but i did it 2 years back using JMF.

You can try using java.io.FileInputStream and java.io.FileOutputStream. These classes are helpful for reading and writing streams of raw bytes such as image data.
I would also suggest to take a look at classes in java.net package for number of different connections.

By taking a look at this url u can cover ur request:

java-source.net/open-source/network-clients/jftp