Re: [tcljava-user] Passing string from tcl to JAVA using tclBlend

[Mo D. <md...@un...>]

On Tue, 07 Mar 2006 00:00:08 +0000
"Mike Price" <mik...@ho...> wrote:

> I am currently working on a final year project where I am using tcl to 
> interact with my JAVA program.  I have used msys to build the following 
> programs (for Windows)
> 
> >tcl8.4.12
> >thread2.6.2
> >tclBlend1.3.2
> >Installed j2sdk1.4.2_11
> 
> I have enabled threads for all of them and built them all without any 
> errors.  I am then running jtclsh.bat in the command window and using the 
> '%package require java' were it is returning 1.3.2 which is assume is 
> correct.
> 
> I have also developed a basic JAVA program with a simple class called 
> 'Hello' that I want to use to simply store the string sent from the tcl 
> interpreter in a variable and then display the variable while running the 
> java program.  Then I have run the following to try and send a variable to 
> JAVA:
> 
> % set jstr [java::new String "A Java String"]
> java0x1
> 
> Im guessing that java0x1 is the variable name that I need to reference but 
> how do I use this variable in my JAVA program?

Well, java0x1 is a Java ref to an object. You need to pass it to a Java method
like so:

public class Test {
    static String str;

    public static void mymethod(String in_str) {
        str = in_str;
    }
}

Then you would invoke this Java method from Tcl like so:

set jstr [java::new String "A Java String"]
java::call Test mymethod $jstr

cheers
Mo DeJong

P.S.
You could also look into setting a field of a Java object using java::field.