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I need to exchange an object between Objective-C client and Java Server. I ask my friends how it can implement, and he answer me that read byte is the way to go. But how can it implements? How can I know the variable length, and related information? Thanks.

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  • It's relatively meaningless to say "exchange objects" between Java and Objective-C without specifying some sort of extra-linguistic object concept. Commented Apr 20, 2012 at 16:13

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You need some sort of serialization format. You could use a text-based format such as XML or JSON, decoding it appropriately (whether by hand or not). Alternatively, there are various portable binary-based serialization formats available, such as Protocol Buffers which has an Objective-C port.

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Objects in different language probably can't be exchanged easily. Instead of sending Java/ObjC objects to Java/ObjC program, I will suggest you to actually send it as some other string structure - maybe XML/JSON. And then reconstruct back the Java/ObjC objects from the XML/JSON.

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There are a lot of options here. JSON, protocol buffers, ... There's even a giant list of possibilities.

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