Java and COM

Question

Is it possible for a program written in Java to be used as a client for a COM object? If so, how do you access the COM interface from the Java class?

Answer 1

if u want to convert java class to COM component .
there is a tool from microsoft called "javareg".(comes with Microsoft SDK for java)
u'll just have to write a very simple COM wrapper for it.
I'm giving a very simple implementataion example for this .
hope this helps
1) - Write a .java file
Here is an example of a simple java file
public class MyJavaClass1
public String myFun1() {
return "from....java class hello! ";
2)
- Compile it in toMyJavaClass1.class
3)
- Use javareg utility (comes with Microsoft sdk for java)
javareg /register /class:MyClass1 /progID:MyJavaToCOM1.java.1 /codebase:E:\MyCOM /typelib:e:\MyCOM\MyTLib.tlb
Do specify codebase and complete path of .tlb file
It will prompt a message �Registered successfully�
4) Write activeX Dll corresponding to this class file in VB using the above �tlb� file
Example of the COM wrapper is:
Option Explicit
Dim obTestCOM As MyJavaClass1.MyJavaClass1
Public Sub Class_Initialize()
Set obTestCOM = New MyJavaClass1.MyJavaClass1
End Sub
Public Sub Class_Terminate()
Set obTestCOM = Nothing
End Sub
Public Function myFun1() As String
myFun1 = obTestCOM.myFun1()
End Function
5)
- Now, it can be called from ASP
Example:
dim ob1
set ob1=server.CreateObject("MyProject1.MyClass1")
Response.Write(ob1.myFun1())
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