Native Type

(C/C++)

JNIWrapper Type

Comments

Boolean Types

bool

Bool(1 byte), IntBool(4 bytes)

Character Types

char

Char

wchar_t

WideChar

uchar *

Char, UInt8

Integer Types

short

ShortInt

The unsigned types are represented by prepending U to the type name, e.g. unsigned int (or unsigned) type is UInt.

There are also types for predefined-width integers: Int8, Int16, Int32 and Int64, they also have the unsigned variants.

int

Int

long

LongInt

Floating-point Types

float

SingleFloat

double

DoubleFloat

long double

LongDouble

Long double is the same as double (8-byte floating-point value) on win32 platform.

Pointer Types (not arrays)

void *

Pointer.Void

const

Pointer.Const

Use Pointer.Const if the referenced object is not to be modified by the calling function.

type *

Pointer

To create a pointer to the value (variable) of a known type, use the Pointer class.
For example: int *i; is Pointer i = new Pointer(new Int());

type *

Pointer.OutOnly

Use Pointer.OutOnly if the referenced value is not read by the calling function.

char *

AnsiString

wchar_t *

WideString

Arrays

<c primitive type>[n]

PrimitiveArray(<corresponding JNIWrapper type>.class, n);

For example:
int i[10];
is
PrimitiveArray i =
  new PrimitiveArray(Int.class, 10);

Structures and Unions

struct

Structure

union

Union

Function Pointers

To create an object callable from the native code use the Callback class.

To call a function returned from the native code use the method asFunction of the Pointer.Void class.