How to do something before exit?

Question

hi all
i'm writing a simple db application
i want it to execute the last update on a db table before exit
the code is:
    private void exitForm(java.awt.event.WindowEvent evt) {
        try
            Statement st=tmc.createStatement(); 
            st.executeUpdate("UPDATE OPERATORI SET LOGGATO=FALSE WHERE OPERATORE='"+user+"'");        
            System.out.println("i'm exiting");
            System.exit(0);
        catch(SQLException s)
            s.printStackTrace();
        }when i got the output message "i'm exiting" i thinked that the db was modified, but checking it i saw that nothing changed
i tried the same code without the "System.exit(0);" line in a actionPerformed method of a temporary button that i putted on my form and it worked
so i think that the System.exit(0) call in a certain way arrives before or interrupts the db transition
i want to hide to my users this action, that's the reason for which i wrote my code in such a way!
any hint?
thanx in advance
sandro

Answer 1

Hi Sandro,
I am using databases and i have never had this problem.
But before closing the application, I always close the connections with database.
Why dont you try
private void exitForm(java.awt.event.WindowEvent evt) {
try
Statement st=tmc.createStatement();
st.executeUpdate("UPDATE OPERATORI SET LOGGATO=FALSE WHERE OPERATORE='"+user+"'");
System.out.println("i'm exiting");
tmc.close(); //close the connection
System.exit(0);
catch(SQLException s)
s.printStackTrace();
I hope it works well for you
sergio