Callable statement return false on execute

Hello
I have a problem with a callable statement, the execute always return false whereas the procedure called work fine in sql+
If you have any idea please tell me ...
thanks

the procedure is :
PROCEDURE test IS
tr_id NUMBER;
BEGIN
tr_id :=2;
END;
-----

the simplified class is :

public class testcall {
private static Connection myConnection;
public static void main(String[] args) {
System.out.println("debut test");
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
myConnection = DriverManager.getConnection("jdbc

racle:thin:@bermudes:1521:EAGLE","training", "training");
boolean resExec = true;
String end_date_query = "{ call training.pck_user_job.test }";
CallableStatement cStmt = myConnection.prepareCall(end_date_query);

resExec = cStmt.execute();
cStmt.close();
System.out.println("updateUserJob ben alors ? "+resExec);
}catch(Exception e){
System.out.println("pb "+e);
}
}
}

In fact I found the solution, after one day of searches, in an other forum. I was wrong in the interpretation of the boolean returned by execute :
"I have no idea what SQL you are executing, but in the Java documentation it says;
Returns:
true if the next result is a ResultSet object; false if it is an update count or there are no more results
So, if you are doing an insert, then the return would always be false.
If you want to know if you were successfull with your insert, you can use executeUpdate instead. This will return the number of rows that were updated, so if it's > 0 then you were succesful. "
may be it will help other people