ActiveX to Java primitive data type conversion values

All primitive Java data types are automatically converted to native ActiveX Automation types. However, not all Automation data types are converted to Java types (for example, VT_DATE). Variant data types are used for data conversion. Variant data types are a requirement of any Automation interface, and are used automatically by Visual Basic and VBScript. The tables below provide details about how primitive data types are converted between Automation types and Java types.

Table 1. ActiveX to Java primitive data type conversion

Visual Basic Type	Variant Type	Java Type	Notes
Byte	VT_I1	byte	Byte in Visual Basic is unsigned, but is signed in Java data type.
Boolean	VT_BOOL	boolean
Integer	VT_I2	short
Long	VT_I4	int
Currency	VT_CY	long
Single	VT_R4	float
Double	VT_R8	double
String	VT_BSTR	java.lang.String
String	VT_BSTR	char
Date	VT_DATE	n/a

 

See also

Example: Using helper methods for data type conversion

 

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