如何从C ++调用Java函数？ [英] How to call Java functions from C++?

问题描述

如何从C ++应用程序调用Java函数？

我知道从CMD（或类似技术）调用它们，但我不想使用它们。

解决方案

例如，选中从C创建JVM 。它显示了创建JVM和调用方法的示例过程。如果JVM已经存在;例如你的C程序被Java程序调用（回调情况），你可以缓存JNIEnv *指针。

作为一个建议，从C / C ++小心缓存指向JVM的指针，有一些语义涉及到什么可以缓存，以后可以调用。为此，正如Brian Agnew指出的，检查JNI参考。

How can I call Java functions from a C++ application?

I know about calling them from CMD (or similar techniques), but I would rather not use them.

解决方案

As an example, check Creating a JVM from C. It shows a sample procedure to create a JVM and invoke a method. If the JVM already exists; e.g. your C program is invoked by the Java program (callback situation), you can cache the JNIEnv* pointer.

As an advice, be careful caching pointers to the JVM from C/C++, there are some semantics involved as to what you can cache and it could be invoked later on. For that, as Brian Agnew pointed out, check the JNI reference.

这篇关于如何从C ++调用Java函数？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！