When JavaMail is executed, all jframes are frozen

I develop the program of automobile management system Then, when the car comes in and drives, I want to send an email to the boss of the company

In my program, it takes about 10 seconds to send an email

Solution

When you perform heavy tasks, you should run them in another thread, not like a GUI If you run in the event dispatch thread, the GUI will freeze until it is completed

You can use swing worker. Here is an example that I like very much

Example:

class Worker extends SwingWorker<String,Object> {

    @Override
    protected String doInBackground() throws Exception {
       //here you send the mail
       return "DONE";
    }

    @Override
    protected void done() {
        super.done();
        //this is executed in the EDT
        JOptionPane.showMessageDialog(null,"Message sent","Success",JOptionPane.INFORMATION_MESSAGE);
    }
}