Java type	JNI type	C type	Stdint C type
boolean	jboolean	unsigned char	uint8_t
byte	jbyte	signed char	int8_t
char	jchar	unsigned short	uint16_t
double	jdouble	double	double
float	jfloat	float	float
int	jint	int	int32_t
long	jlong	long long	int64_t
short	jshort	short	int16_t