什么是正确的'在Java对象中存储本机指针的方法? [英] What is the 'correct' way to store a native pointer inside a Java object?

问题描述

在Java对象中存储本机指针的正确"方法是什么?

What is the 'correct' way to store a native pointer inside a Java object?

如果我碰巧知道本机指针的大小是< = 32位，则可以将其视为Java int ，如果我知道，则可以将其视为Java long 碰巧知道本机指针的大小是< = 64位.但是，有没有更好或更干净的方法呢?

I could treat the pointer as a Java int, if I happen to know that native pointers are <= 32 bits in size, or a Java long if I happen to know that native pointers are <= 64 bits in size. But is there a better or cleaner way to do this?

编辑:我 不想从JNI函数返回本机指针.我宁愿返回一个代表本地资源的Java对象.但是，我返回的Java对象必须具有一个包含指针的字段，这使我回到了最初的问题.

Edit: Returning a native pointer from a JNI function is exactly what I don't want to do. I would rather return a Java object that represents the native resource. However, the Java object that I return must presumably have a field containing a pointer, which brings me back to the original question.

或者，JNI函数是否有更好的方法返回对本机资源的引用?

Or, alternatively, is there some better way for a JNI function to return a reference to a native resource?

推荐答案

IIRC， java.util.zip 和 java.nio 都使用 long .

IIRC, both java.util.zip and java.nio just use long.

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