debug java variable in RPGLE

Hi,

I wrote a testing program to call java class from ILE RPG.

H DftActGrp(*no) actgrp(*caller)
d
DcrtString PR O ExtProc(*JAVA:
D 'java.lang.String':
D *CONSTRUCTOR)
D CLASS(*JAVA:'java.lang.String')
D parm 256A VARYING
D
DtoString PR O ExtProc(*JAVA:
D 'java.lang.Integer':
D 'toString')
D CLASS(*JAVA:'java.lang.String')
D STATIC
D
DgetBytes PR 256A ExtProc(*JAVA:
D 'java.lang.String' :
D 'getBytes')
D VARYING
D
D jString S O CLASS(*JAVA:'java.lang.String')
D testString1 S 256A varying
D inz(' dft sd ')
D testString2 S 256A varying
D
/free
jString = crtString(testString1);
testString2 = getBytes(jString);
*INLR = *ON;
/end-free
C

I want to debug the variable of java Object, for example, String. I tried both WSDC debugger and STRDBG but I cannot get the value of the String variable. Hope you guys can help. Thanks

Kevin