How do I call the native API from Java?


I met a situation to call native API from Java..Not able to implement..

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You can do this only in an application, not in an applet. You will need to write some intermediary code in C or another traditional language and call your C code from Java.

public class HelloWorld {
private static native void writeHelloWorldToStdout();

public static void main(String[] args) {
writeHelloWorldToStdout();
}
}

Go ahead and compile the given class.

Since our native method will be written in C, it makes no sense for it to contain code (hence, it is a declaration only; vaguely like an abstract method). The Java compiler simply accepts that if a method is declared native, the implementation of the method will be loaded into the VM at runtime.