【Java】native关键字

使用native关键字说明这个方法是原生函数,也就是这个方法是用C/C++语言实现的,并且被编译成了DLL,由java去调用。
这些函数的实现体在DLL中,JDK的源代码中并不包含,你应该是看不到的。对于不同的平台它们也是不同的。这也是java的底层机制,实际上java就是在不同的平台上调用不同的native方法实现对操作系统的访问的。

java的跨平台是以牺牲一些对底层的控制为代价,若java要实现对底层的控制,就需要一些其他语言的帮助,这个就是native的作用了

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