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Java-C-Assembly Matryoshka is possible to “connect” java to C (via Java-Native-Interface or JNI) to speed up some critical pieces of code. In real world there is no advantage of such delegation as it won’t speed up anything. The example we’ll look at will be: given a command line program (written in Java) We execute the program with providing 2 integers as arguments (with error handling on the client side) The main business logic is the “sum” method, which we consider a critical piece of the program.