Program Logic & Java Graphics

Question

can anyone provide the source code how to create a ticket system. The system should have 2 category, adults and children with a pulldown menu for how many adults or children and calculate the total price of the ticket.
example: Adult/$2.00 (the pulldown menu, 1 to 10) total
Children/$1.00(the pulldown menu, 1 to 10) total
(sum total)

Answer 1

Assuming this is an application, your main class is going to extend a JFrame, which is what makes a window.
We add a JPanel to that so that we have something to add our JLabels and JComboBoxes too.
I'm not doing any formatting in this example
class TicketCalculator extends JFrame
    JPanel panel = new JPanel();
    JComboBox childBox = new JComboBox();
    JComboBox adultBox = new JComboBox();
    JLabel total = new JLabel();
    //add all the JLabels
    public TicketCalculator()
        panel.add(childBox);
        panel.add(adultBox);
        panel.add(total);
        childBox.addItemListener(new ItemListener()
            public void itemStateChanged(ItemEvent e)
                 total.setText("" + calculate());
        add(panel);
        pack();
        show();
    public double calculate()
        //do calculating
        //use new Double(childBox.getSelectedItem()).doubleValue();
}