RE: RPG calling JAVA

[DReid@xxxxxxxxxxxxxxxxxx]

Barbara,
Thanks for your speedy response. As you said, it should work. However, it is 
not finding the constructor. I have another constructor that takes lines, 
columns and String. When I use this it works fine.

-----Original Message-----
From: Barbara Morris [mailto:bmorris@ca.ibm.com]
Sent: Wednesday, September 25, 2002 12:25 PM
To: java400-l@midrange.com
Subject: Re: RPG calling JAVA

DReid=YIIhEVrBDcoOKQVC8Cy+LtBPR1lH4CV8@public.gmane.org wrote:
>
> I have a RPG program that is instantiating a java class. Below is my 
>prototype in my rpg program.
>
>      D PageText        PR              O   ExtProc(*JAVA:'PageText':
>      D                                             *Constructor)
>      D  lines                        10I 0 Value
>      D  columns                      10I 0 Value
>      D  streamData                     O   Class(*JAVA:
>      D                                     'java.io.ByteArrayInputStream')
>
> Below is my java constructor.
>
>   PageText(int lns, int cols, InputStream data) {
>
> I am getting the following message :
>  Cause . . . . . :   RPG procedure PAGER in program PAGER/DEON received Java
>    exception "java.lang.NoSuchMethodError: <init>" when calling method 
>"<init>"
>    with signature "(IILjava.io.ByteArrayInputStream;)V" in class "PageText".
>
> Could RPG have a problem interpreting a ByteArrayInputStream as an 
>InputStream. This I think would work in java. Could someone help?
>

The RPG runtime locates the method to be called using the signature
derived from your prototype.  Each Java method only has one signature,
derived from the parameters you coded on the method.  So you have to
code your RPG prototype to exactly match the signature of the
constructor.

If a ByteArrayInputStream is valid as an InputStream parameter, passing
a ByteArrayInputStream object to the constructor should work fine.





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