How to call java function in Oracle forms?

Hi I am having Oracle 9i with 10g Developer Suite.
I am new to Oracle forms..
I had one function in java getDatas()..
How can I call this function in Oracle Forms..
Pls help
Thanks

Thanks Francois,
I want to display values from my java code in the Forms..
For that purpose only i am installing 10g Developer Suite..
The below is java code..
public class DBTest {
          public static String callDB(int id,String name){
          String ss="Hai";
          Connection con=null;
          try{
               Class.forName("oracle.jdbc.driver.OracleDriver");
               con = DriverManager.getConnection("url","id","pwd");
               Statement st=con.createStatement();
               System.out.println("Connected...");
          int r=st.executeUpdate("Insert into FORM_TEST VALUES('"+id+"','"+name+"')");
               if(r==1){
                    ss="Inserted Sucessfully";
               else{
                    ss="Insertion Failed";
          }catch(final Exception e){
          System.out.println(e);
          return ss;
     public static void main(String[] args) {
          int empid=102;
          String empname="Gilbert";
          String resultStr=callDB(empid,empname);
          System.out.println(resultStr);
I want to dispaly Inserted or Insertion Failed in Oracle Forms..
As per Gerd Volberg suggestion, i had placed DBTest.jar in
E:\DevSuite\forms\java\DBTest.jar
and in formsweb.cfg the below jar is added..
archive_jini=frmall_jinit.jar,DBTest.jar
But in Fomrs Builder-->Program-->Import Java Classes-->Oracle
org,ice,com and subnodes are available.
But my jar is not available..
Is my way is coorect?
Pls provide soln..
Thanks

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-- DO NOT EDIT THIS FILE - it is machine generated!
args   JNI.ARGLIST;
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT IS
BEGIN
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    a0    ORA_JAVA.JARRAY) IS
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Sir i use java importer.
PACKAGE BODY get_info IS
-- DO NOT EDIT THIS FILE - it is machine generated!
args   JNI.ARGLIST;
-- Constructor for signature ()V
FUNCTION new RETURN ORA_JAVA.JOBJECT IS
BEGIN
    args := NULL;
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END;
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    JNI.ADD_OBJECT_ARG(args, a0, '[Ljava/lang/String;');
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END;
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BEGIN
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Basicaly i don't know how to call java program in form builder.
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DECLARE
jo ora_java.jobject;
rv varchar2(1500);
ex ora_java.jobject;
BEGIN
jo := get_info.new;
rv:=get_info.ch_add(jo );
EXCEPTION
WHEN ORA_JAVA.JAVA_ERROR then
message (' Unable to call out to Java, ' ||ORA_JAVA.LAST_ERROR );
message('');
WHEN ORA_JAVA.EXCEPTION_THROWN then
ex := ORA_JAVA.LAST_EXCEPTION;
message(' Unable to call out to Java ' ||Exception_.toString (ex ) );
message(' Unable to call out to Java ' ||Exception_.toString (ex ) );
END;
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