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    <p>The usual way how Protocol Buffers work is:</p> <ul> <li>You define your protocol in a small <code>.proto</code> text file.</li> <li>You run the protobuf compiler on that file</li> <li>proto compiler generates source code in all the languages you need to serialize &amp; parse objects.</li> </ul> <p>The library you use in C# is special. It does not need that <code>.proto</code> file to start with. Instead you can create the protocol within your code by annotating classes (or whatever the terminology in C# is).</p> <p>In order to use your in-code-generated protocol from Java you need the <code>.proto</code> file since Java does not support that type of definition in code.</p> <p>You can either write the <code>.proto</code> file by hand or let the C# library generate it (see Marc Gravell's answer) - I would suggest you generate the file so you can't make mistakes in the definition.</p> <p>Once you have that file you run the protobuf compiler (<code>protoc</code>) <a href="http://code.google.com/p/protobuf/downloads/detail?name=protoc-2.5.0-win32.zip" rel="nofollow">(dowload)</a> on the <code>.proto</code> file and it will generate a <code>.java</code> file for you. That file has the <code>Person</code> class and everything required to serialize and parse.</p> <p>Now you include both <code>protobuf[version].jar</code> and the generated <code>.java</code> file in your project. The <code>.proto</code> file itself is not required in the project.</p> <p>Once you have done that simply use the generated code to parse the file:</p> <pre><code>Person person = Person.parseFrom(new FileInputStream(file)); </code></pre> <p>The only line of code that you write is that one above.</p> <p>More details about the Java integration is found in the official <a href="https://developers.google.com/protocol-buffers/docs/javatutorial" rel="nofollow">tutorial</a></p>
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    1. POHow to de-serialize the file in Java by using Protocol-buffer?
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    1. COHi zapl i loved the way you have explained.
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