I'm pretty lost on this. I have no idea how to get my program to work. Basically, when an option is selected a price should show up in the text box automatically. Thank you all for your help.

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.JComboBox cannot be cast to javax.swing.JTextField
at BCard$ComboListener.actionPerformed(BCard.java:164)
at javax.swing.JComboBox.fireActionEvent(JComboBox.java:1240)
at javax.swing.JComboBox.setSelectedItem(JComboBox.java:567)
at javax.swing.JComboBox.setSelectedIndex(JComboBox.java:603)
at javax.swing.plaf.basic.BasicComboPopup$Handler.mouseReleased(BasicComboPopup.java:816)
at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:273)
at java.awt.Component.processMouseEvent(Component.java:6216)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at javax.swing.plaf.basic.BasicComboPopup$1.processMouseEvent(BasicComboPopup.java:480)
at java.awt.Component.processEvent(Component.java:5981)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4583)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4556)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4220)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4150)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)

import javax.swing.*;
import java.awt.event.*;

public class BCard extends JFrame
{
    private JPanel panel;
    //private JPanel panel2;
    //private JPanel panel3;
    //private JPanel panel4;
   // private JPanel panel5;
    //private JPanel panel6;
    //private JPanel panel7;
    private JLabel msgLbl;
    private JLabel lbl;
    private JLabel lbl2;
    private JRadioButton oneB;
    private JRadioButton bothB;
    private JRadioButton glossB;
    private JRadioButton matteB;
    private JRadioButton twoDB;
    private JRadioButton sevenB;
    private JRadioButton wksB;
    private JRadioButton reqB;
    private JRadioButton dontB;
    private JTextField bCTotal;
    private String[] bC = {"100", "250", "500", "1000", "2000"};
    private JComboBox bCQty;
    private ButtonGroup radioButtonGroupSd;
    private ButtonGroup radioButtonGroupQual;
    private ButtonGroup radioButtonGroupDel;
    private ButtonGroup radioButtonGroupDes;
    private final int WINDOW_WIDTH = 300;
    private final int WINDOW_HEIGHT = 200;
    boolean value = true;

    public BCard()
    {
        setTitle("Business Cards");
        setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        buildBCPanel();
        add(panel);
        //add(panel2);
        //add(panel3);
        //add(panel4);
        //add(panel5);
        //add(panel6);
        //add(panel7);
        setVisible(value);
    }

     private void buildBCPanel()
    {
        msgLbl = new JLabel("Select the criteria that fits your needs:");
        lbl = new JLabel("Quantity:");
        bCQty = new JComboBox(bC);
        oneB = new JRadioButton("One side");
        bothB = new JRadioButton("Both sides");
        glossB = new JRadioButton("Gloss");
        matteB = new JRadioButton("Matte");
        twoDB = new JRadioButton("Next Day");
        sevenB = new JRadioButton("Seven Days");
        wksB = new JRadioButton("Up to Two Weeks");
        reqB = new JRadioButton("Request Design");
        dontB = new JRadioButton("Don't Require");
        lbl2 = new JLabel("Your total may be $");
        bCTotal = new JTextField(10);
        bCTotal.setEditable(false);

        radioButtonGroupSd = new ButtonGroup();
        radioButtonGroupSd.add(oneB);
        radioButtonGroupSd.add(bothB);
        radioButtonGroupQual = new ButtonGroup();
        radioButtonGroupQual.add(glossB);
        radioButtonGroupQual.add(matteB);
        radioButtonGroupDel = new ButtonGroup();
        radioButtonGroupDel.add(twoDB);
        radioButtonGroupDel.add(sevenB);
        radioButtonGroupDel.add(wksB);
        radioButtonGroupDes = new ButtonGroup();
        radioButtonGroupDes.add(reqB);
        radioButtonGroupDes.add(dontB);

        bCQty.addActionListener(new ComboListener());
        //oneB.addActionListener(new RadioButtonListener());
       // bothB.addActionListener(new RadioButtonListener());
        //glossB.addActionListener(new RadioButtonListener());
        //matteB.addActionListener(new RadioButtonListener());
        //twoDB.addActionListener(new RadioButtonListener2());
        //sevenB.addActionListener(new RadioButtonListener2());
        //wksB.addActionListener(new RadioButtonListener2());
        //reqB.addActionListener(new RadioButtonListener());
        //dontB.addActionListener(new RadioButtonListener());

        panel = new JPanel();
        panel.add(msgLbl);
        //panel2 = new JPanel();
        panel.add(lbl);
        panel.add(bCQty);
        //panel3 = new JPanel();
        panel.add(oneB);
        panel.add(bothB);
        //panel4 = new JPanel();
        panel.add(glossB);
        panel.add(matteB);
       // panel5 = new JPanel();
        panel.add(twoDB);
        panel.add(sevenB);
        panel.add(wksB);
       // panel6 = new JPanel();
        panel.add(reqB);
        panel.add(dontB);
        //panel7 = new JPanel();
        panel.add(lbl2);
        panel.add(bCTotal);
    }

     private class ComboListener implements ActionListener
     {
        public void actionPerformed (ActionEvent e)
        {
            double oneHun = 8.95;
            double twoFif = 11.95;
            double fiveHun = 12.95;
            double oneThou = 13.95;
            double twoThou = 27.95;
            String oneHunS = Double.toString(oneHun);
            String twoFifS = Double.toString(twoFif);
            String fiveHunS = Double.toString(fiveHun);
            String oneThouS = Double.toString(oneThou);
            String twoThouS = Double.toString(twoThou);

            if("100".equals(e.getActionCommand()))
            {
              JTextField bCTotal = (JTextField)e.getSource();
            bCTotal.setText(oneHunS);
              }
            else if("250".equals(e.getActionCommand()))
            {
            JTextField bCTotal = (JTextField)e.getSource();
            bCTotal.setText(twoFifS);
              }
            else if("500".equals(e.getActionCommand()))
            {
            JTextField bCTotal = (JTextField)e.getSource();
            bCTotal.setText(fiveHunS);
              }
            else if("1000".equals(e.getActionCommand()))
            {
            JTextField bCTotal = (JTextField)e.getSource();
            bCTotal.setText(oneThouS);
              }
            else
            {
                JTextField bCTotal = (JTextField)e.getSource();
            bCTotal.setText(twoThouS);
            }

        }
            
      
     }

       

    public static void main(String[] args)
     {
        BCard bCard = new BCard();


     }
}

Edited 6 Years Ago by Nick Evan: Added code-tags

e.getSource() returns the component that generated the event, which in your case is the combo box. You cannot cast that JComboBox reference to a JTextField.

e.getSource() returns the component that generated the event, which in your case is the combo box. You cannot cast that JComboBox reference to a JTextField.

Ok, I got you. I commented out the

JTextField bCTotal = (JTextField)e.getSource();

in each if statement. When I did that and selected a quantity, 27.95 showed up in the textfield. I realize that was do to the fact that the final if statement did not have the statement

if("#".equals(e.getActionCommand()))

in it. So I am figuring that I need to find a different way to go about finding the quantity. Any help on how I should go about this would be great.

You can get the selected object from the combo box directly with getSelectedObject()If you already have a reference to combo box, you can use it directly, otherwise you can cast the event source (JComboBox)e.getSource() and use that.

You can get the selected object from the combo box directly with getSelectedObject()If you already have a reference to combo box, you can use it directly, otherwise you can cast the event source (JComboBox)e.getSource() and use that.

So would that look something like this:

if(e.getSelectedItem() == 100)
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