combo boxes



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joseph merriex
combo boxes
0 Answer(s)      6 years and 9 months ago
Posted in : Java Beginners

how do you store numbers in the choices. ex. soda is $.75 and tax is $.07 then it equals a new total. I've been trying to use the Itemlistener but i can't figure out how to store the numbers

import javax.swing.*; import java.awt.*; import java.awt.event.*; import javax.swing.ButtonGroup; import javax.swing.ComboBoxModel; import javax.swing.DefaultComboBoxModel; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JLabel; import javax.swing.JRadioButton; import javax.swing.JTextField;

import javax.swing.WindowConstants; import javax.swing.SwingUtilities;

public class BurgeMenu extends javax.swing.JFrame implements ItemListener
{ private JLabel jLabel1; private JLabel jLabel2; private JLabel jLabel3; private JLabel jLabel4; private JLabel jLabel5; private JRadioButton jRadioButton5; private JRadioButton jRadioButton4; private JRadioButton jRadioButton3; private JRadioButton jRadioButton2; private JRadioButton jRadioButton1; private ButtonGroup buttonGroup1; private JTextField totalbox; private JTextField taxbox; private JTextField subtbox; private JButton jButton1; private JButton jButton2; private JLabel jLabel8; private JLabel jLabel7; private JLabel jLabel6; private JComboBox jComboBox2; private JComboBox jComboBox1; private JTextField sprqst; double Cheeseburger = 2.49; double DoubleCheeseburger = 3.89; double TripleCheeseburger = 4.99; double Medium = .75; double Large = 1.25; double tax = .07; double subtotal; double total;

* Auto-generated main method to display this JFrame
public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            BurgeMenu inst = new BurgeMenu();

public BurgeMenu() {

private void initGUI() {
    try {
            jLabel1 = new JLabel();
            jLabel1.setBounds(204, 0, 125, 30);
            jLabel2 = new JLabel();
            jLabel2.setBounds(24, 43, 90, 16);
            jLabel3 = new JLabel();
            jLabel3.setBounds(24, 76, 129, 16);
            jLabel4 = new JLabel();
            jLabel4.setBounds(24, 110, 72, 16);
            sprqst = new JTextField();
            sprqst.setBounds(171, 73, 158, 22);
            ComboBoxModel jComboBox1Model = 
                new DefaultComboBoxModel(
                        new String[] { "1.Cheeseburger", "2.Double Cheeseburger","3.Triple Cheeseburger" });
            jComboBox1 = new JComboBox();
            jComboBox1.setBounds(171, 36, 166, 22);
            jLabel5 = new JLabel();
            jLabel5.setBounds(24, 163, 56, 16);
            ComboBoxModel jComboBox2Model = 
                new DefaultComboBoxModel(
                        new String[] { "Small", "Medium","Large" }); 

            jComboBox2 = new JComboBox();       
            jComboBox2.setBounds(171, 160, 132, 22);
            jLabel6 = new JLabel();
            jLabel6.setBounds(24, 205, 72, 16);
            jLabel7 = new JLabel();
            jLabel7.setBounds(24, 245, 56, 16);
            jLabel8 = new JLabel();
            jLabel8.setBounds(24, 288, 56, 16);
            jButton1 = new JButton();
            jButton1.setText("Submit Order");
            jButton1.setBounds(171, 324, 117, 22);
            jButton2 = new JButton();
            jButton2.setBounds(316, 324, 71, 22);
            subtbox = new JTextField();
            subtbox.setBounds(171, 202, 68, 22);
            taxbox = new JTextField();
            taxbox.setBounds(171, 242, 68, 22);
            totalbox = new JTextField();
            totalbox.setBounds(171, 285, 68, 22);
            jRadioButton1 = new JRadioButton();
            jRadioButton1.setBounds(171, 108, 60, 20);
            jRadioButton2 = new JRadioButton();
            jRadioButton2.setBounds(171, 131, 64, 20);
            jRadioButton3 = new JRadioButton();
            jRadioButton3.setText("Diet Coke");
            jRadioButton3.setBounds(236, 108, 85, 20);
            jRadioButton4 = new JRadioButton();
            jRadioButton4.setText("Root Beer");
            jRadioButton4.setBounds(235, 131, 82, 20);
            jRadioButton5 = new JRadioButton();
            jRadioButton5.setBounds(321, 108, 68, 20);
        this.setSize(500, 402);
    catch (Exception e) 
        //add your error handling code here

private ButtonGroup getButtonGroup1()
    if(buttonGroup1 == null) 
        buttonGroup1 = new ButtonGroup();
    return buttonGroup1;

public void itemStateChanged(ItemEvent event) 
     if( event.getStateChange( ) == ItemEvent.SELECTED)
     else if( event.getStateChange( ) == 1)


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