From the client side, you open a Socket and then:

   oos = new ObjectOutputStream(socket.getOutputStream());
   oos.writeObject(someObject);

On the server side, you use the ObjectInputStream.readObject method.

 Related Tips

• A custom combobox editor for use with the EditableComboBox class
• A demonstration of Java2D transformations
• A game of Tic-Tac-Toe that can be played between two client applets
• A Label that uses inline HTML to format its text
• A program to print limits of the primitive types
• A sample of inline DTD definition
• A sample of linked DTD definition
• A sample XML file