You can invent an ad-hoc way to encode the data items into a single string – such as encoding 4 ints as '12:3:-23:67'.

213), and also doesn't work very well if you need to share data with applications written in C++ or Python. This is the default approach since it's built into the language, but it has a host of well-known problems (see Effective Java, by Josh Bloch pp. How do you serialize and retrieve structured data like this? There are a few ways to solve this problem: Each person in the address book has a name, an ID, an email address, and a contact phone number. The example we're going to use is a very simple 'address book' application that can read and write people's contact details to and from a file. For more detailed reference information, see the Protocol Buffer Language Guide (proto2), the Protocol Buffer Language Guide (proto3), the Java API Reference, the Java Generated Code Guide, and the Encoding Reference.

This isn't a comprehensive guide to using protocol buffers in Java. Use the Java protocol buffer API to write and read messages.By walking through creating a simple example application, it shows you how to This tutorial provides a basic Java programmer's introduction to working with protocol buffers.

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