Public method of javabean not executed when invoked with FBEAN.INVOKE_NUM

Question

Hi,
i write a trivial javabean with public method named 'somme' that return int value and take no arguments.
i my PL/SQL trigger code, i register an instance of the bean and take a call to the public method 'somme' that return a int value that i display in display item of my form.
the java bean is well registered and i verified that the code in the constructor is well executed. But the call to the public methode dont work.
thank you for your help.

Answer 1

Hello,
it's a mistake for me. when i instanciate the javabean from another java classe in jdev, the execution is well and the process exited with code 0.
but when i instanciate it from pl/sql the problem occurs.
i commented all the lines of my code except the line that register the javabean
     FBean.Register_Bean(hBean, 1, 'amar.FbeanExemple');
and i have the same problem even though the code in the constructor is executed.
the error occurs after the code in the concstructor is executed.
i folllow all the information about this error:
Contenu de la console Java
JInitiator: Version 1.3.1.18
Utilisation de la version JRE 1.3.1.18-internal Java HotSpot(TM) Client VM
Répertoire d'accueil de l'utilisateur = C:\Documents and Settings\amsai1
Configuration du proxy : aucun proxy
JAR cache enabled
Location: C:\Documents and Settings\amsai1\Oracle Jar Cache
Maximum size: 50 MB
Compression level: 0
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
q: hide console
s: dump system properties
t: dump thread list
x: clear classloader cache
0-5: set trace level to <n>
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/banicons.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/bannerui71.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/banspecial.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/banorep71.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/bannerid71.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/f90all_jinit.jar from JAR cache
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/missing.jar from JAR cache proxyHost=null proxyPort=0 connectMode=HTTP, native. La version Forms Applet est : 9.0.4.0
*** VBean null PropertyManager for id = FOREGROUND
*** VBean Got FOREGROUND = null
*** VBean null PropertyManager for id = BACKGROUND
*** VBean Got BACKGROUND = null *** VBean Setting debugMode to ALL *** VBean Setting beanName to amar.FbeanExemple
Loading http://sit-p-amsai1.sit.ulaval.ca:8889/forms90/java/fbeanexemple.jar from JAR cache
Instance hhhjhyu du bean est créée op1 = 0 op2 = 0
*** VBean Failed to instantiate class: amar.FbeanExemple java.lang.ClassCastException: amar.FbeanExemple
Ma classe Java
package amar;
public class FbeanExemple
     private int op1;
     private int op2;
public FbeanExemple()
System.out.println("Instance hhhjhyu du bean est créée");
System.out.println("op1 = " + this.op1);
System.out.println("op2 = " + this.op2);
public int additionner()
return this.op1 + this.op2;
public int soustraire()
return this.op1 - this.op2;
public int sommer(int a, int b)
return a + b;
public void faire()
System.out.println("je suis passe par ici");
public void setOp1(int a)
this.op1 = a;
public void setOp2(int a)
this.op2 = a;
public int getOp1()
return this.op1;
public int getOp2()
return this.op2;
Mon code PL/SQL
declare
     hBean ITEM := Find_Item('CTL.BEAN_AREA4');
     result INTEGER;
begin
     FBEAN.SET_LOGGING_MODE(hBean,1,FBEAN.LOG_ALL);
     FBean.Register_Bean(hBean, 1, 'amar.FbeanExemple');
     result := FBean.Invoke_Num(hBean, 1, 'additionner');
     :CTL.R := result;
end;
Thank you for your help.