JNA编程之数据类型映射

最新推荐文章于 2023-10-30 19:58:31 发布

longgangbai

最新推荐文章于 2023-10-30 19:58:31 发布

阅读量950

点赞数

CC 4.0 BY-SA版权

文章标签： java 数据结构与算法操作系统

本文链接：https://blog.youkuaiyun.com/longgangbai/article/details/84371124

本文详细介绍了Java与C及操作系统数据类型的映射关系，包括基本数据类型、字符串、结构体等，并提供了JNA支持的数据类型映射表。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1 ，当前路径是在项目下，而不是 bin 输出目录下。

2 ，数据结构的对应关系：

Java—C和操作系统数据类型的对应表

Java Type	C Type	Native Representation
boolean	int	32-bit integer (customizable)
byte	char	8-bit integer
char	wchar_t	platform-dependent
short	short	16-bit integer
int	int	32-bit integer
long	long long, __int64	64-bit integer
float	float	32-bit floating point
double	double	64-bit floating point
Buffer Pointer	pointer	platform-dependent (32- or 64-bit pointer to memory)
<T>[] (array of primitive type)	pointer array	32- or 64-bit pointer to memory (argument/return) contiguous memory (struct member)
除了上面的类型， JNA 还支持常见的数据类型的映射。
String	char*	NUL-terminated array (native encoding or jna.encoding )
WString	wchar_t*	NUL-terminated array (unicode)
String[]	char**	NULL-terminated array of C strings
WString[]	wchar_t**	NULL-terminated array of wide C strings
Structure	struct* struct	pointer to struct (argument or return) ( or explicitly ) struct by value (member of struct) ( or explicitly )
Union	union	same as Structure
Structure[]	struct[]	array of structs, contiguous in memory
Callback	<T> (*fp)()	function pointer (Java or native)
NativeMapped	varies	depends on definition
NativeLong	long	platform-dependent (32- or 64-bit integer)
PointerType	pointer	same as Pointer