kotlin can replace java completely because it compiles to bytecode (as java does). And then it is the bytecode what is compiled/interpreted in the JVM. The tec

kotlin can replace java completely because it compiles to bytecode (as java does). And then it is the bytecode what is compiled/interpreted in the JVM. The tech preview is about kotlin compiling directly to machine code. They already said they haven't done any optimization into that code. I guess they use some intermediate language for the compiler to translate it to machine code. (note that all the compilers translate the original input file into this intermediate language before compiling it to the final code, so they can do a lot of optimization and checks in this code which are shared among all languages)