Calling Java Methods
Of course, Java programming language functions can call C functions—that is what native methods are for. Can we go the other way? Why would we want to do this anyway? The answer is that it often happens that a native method needs to request a service from an object that was passed to it. We first show you how to do it for non-static methods, and then we show you how to do it for static methods.
Non-Static Methods
As an example of calling a Java method from native code, let's enhance the Printf class and add a method that works similarly to the C function fprintf. That is, it should be able to print a string on an arbitrary PrintWriter object.
class Printf3 { public native static void fprint(PrintWriter out, String s, double ...Get Core Java™ 2 Volume II - Advanced Features, Seventh Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
