Does each of java API function map to java native method?
If not then how those functions get the functions of operating system?
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Does each of java API function map to java native method?
If not then how those functions get the functions of operating system?
Some of them do, and others build on top of the former (or on functionality offered by the JVM itself). Only very few methods map directly to native code, as it is platform specific, and the whole point of the JVM is to offer a platform neutral stage for the code to run.