Binding / Talking method between language.
Generally, service communication uses a REST approach with HTTP and TCP protocols and XML or JSON as the serialization format. From an interface perspective, it is about embracing the web design approach. But nothing stops you from using binary protocols or your own data formats.
A software developer defines:
in a description file following the grammar of an interface description language.
Source code is generated from that description for generating or parsing a stream of bytes that represents the structured data.
Implementation:
See also which formats for cross-language serialization of data using a schema do you prefer?
Java from:
REST calls from client to server.
Example:
Net protocol through socket.
See: