README.TXT

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This sample demonstrates Java->COM and COM->Java communications. 
 
The sample is invoked from Java.  The constructor of the class we invoke  
instantiates a COM-implemented object.  Three methods are then exercised. 
 
The first two methods take and return numeric arguments.  The third method 
instantiates a Java-implemented object, and passes the interface pointer back 
to Java, caching a local copy for its own use later on.  The new java object 
is then used from both Java and COM transparently.  That is, the COM object 
treats it no differently than any other COM object, and Java treats it as a 
Java object. 
 
Copyright (c) 1996-1997 Microsoft Corporation.  All rights reserved. 
 
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CONTENTS: 
 
odl\                            ** interface descriptions 
NatCom.odl 
jNatCom.odl 
 
com\                            ** COM server 
natcom.cpp 
natcom.def 
natcom.h 
makefile 
 
java\ 
_1\                     ** run this to exec sample 
JMain.java 
makefile 
 
_2\                     ** called from COM and java 
JMain.java 
reg.bat 
makefile 
 
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BUILD INSTRUCTIONS: 
The executable files that are built from this sample are included, so you do  
not need to build the sample in order to run it.  However, the following 
information is included if you want to build the sample yourself.  
 
Dependencies: 
  jvc.exe, cpdbase.dll, msjvc.dll, jactivex.exe, javareg.exe. 
  (All are included in the SDK BIN directory. 
   JVC.EXE must be version 1.02.3920 or later.) 
 
To build from this subdirectory: 
  nmake /a 
 
 
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RUNNING THE SAMPLE: 
 
  Use the GO.BAT in this subdirectory.  This batch file does the following: 
 
  1. Registers the COM server (regsvr32 com\natcom.dll) 
 
  2. Registers the Java server (java\_2\reg.bat) 
 
  3. Executes JVIEW java._1.JMain 
     (Note: Your CLASSPATH must include '.' subdirectory) 
 
  4. Un-registers the Java server (java\_2\unreg.bat) 
   
  5. Un-registers the COM server (regsvr32 /u com\natcom.dll) 
 
 
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EXPECTED CONSOLE OUTPUT: 
 
2 * 5 = 10 
inc.Square(10) = 100 
invoked from COM: Hello World 
invoked from Java: Hello World 
 
 
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