Properties File - need some help

hello, Im trying to figure out how to work with the Properties class. I think it can handle what i'm trying to accomplish. Maybe someone can point me in the direction of some rookie material to read. But anyway heres my dilemma. I need to create some form of structured message that can be saved (properties file), but i don't know how to structure it in the way specified.
For example, say the message has 3 fields: ID(unsigned int), TIME(unsigned long int), and SIZE(unsigned int)
I want ID to take up the first 2-bytes of the message, TIME to take the next 4, and SIZE have the remaing 4. Whats the best way to create this? I'm new to this stuff, and looking for some direction...i don't know where to start

Take a look at the API docs for java.io.DataOutputStream and java.io.DataInputStream. If you are serializing these to the filesystem, you will want to wrap a java.io.FileOutputStream and java.io.FileInputStream with the appropriate data stream type.
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