Dormitory Calculator

[blknmld69]

Any ideas on how I would could this to add the selection in each box and put it in the total charges label?

import java.awt.BorderLayout;
   import java.awt.event.ActionEvent;
   import java.awt.event.ActionListener;

   import javax.swing.JButton;
   import javax.swing.JComboBox;
   import javax.swing.JFrame;
   import javax.swing.JLabel;
   import javax.swing.JPanel;
   import javax.swing.JTextField;

/**
		The Main class creates the GUI for the Dorm and 
		Meal charges.
 */
   public class Main extends JFrame
   {
      private JPanel dormPanel;
      private JComboBox dormBox;
      private JPanel mealPanel;
      private JComboBox mealBox;
      private JPanel totalChargesPanel;
      private JPanel selectedMealPanel;
      private JPanel buttonPanel;
      private JButton calcButton;
      private JLabel label1;
      private JTextField totalCharges;
   
      private String[] dorm = { "Allen Hall: $1,500 per semester", 
         "Pike Hall: $1,600 per semester", 
         "Farthing Hall: $1,200 per semester", 
         "University Suites: $1,800 per semester"};
   
      private String[] meal = { "7 meals per week: $650 per semester", 
         "14 meals per week: $1,095 per semester", 
         "Unlimited meals: $1,500 per semester"};
   
   /**
   		Constructor
    */
      public Main()
      {
         super("Dormitory and Meal Plan");
      
      // Specify an action for the close button.
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      
      // Create a BorderLayout manager.
         setLayout(new BorderLayout());
      
      // Create the dorm and meal panel.      
         buildDormPanel();
         buildMealPanel();
         buildSelectedTotalChargesPanel();
         buildButtonPanel();
      
      // Add the components to the content pane.   
         add(dormPanel, BorderLayout.WEST);
         add(mealPanel, BorderLayout.EAST);
         add(totalChargesPanel, BorderLayout.SOUTH);
         add(buttonPanel, BorderLayout.NORTH);
      
      // Pack the contents of the window and display it.    
         pack();
         setVisible(true);
      }
   
   // The buildDormPanel method builds the dorm panel.	
      private void buildDormPanel()
      {
      // Create the dorm panel.      
         dormPanel = new JPanel();
         dormBox = new JComboBox(dorm);
      
      // Register the action listener.      
         dormBox.addActionListener(new ComboBoxListener());
      
      // Add the dorm panel to the panel.
         dormPanel.add(dormBox);
      }
   
   // The buildMealPanel method builds the meal panel.	
      private void buildMealPanel()
      {
      // Create the meal panel.      
         mealPanel = new JPanel();
         mealBox = new JComboBox(meal);
      
      // Register the action listener.
         mealBox.addActionListener(new ComboBoxListener());
      
      // Add the meal panel to the panel.
         mealPanel.add(mealBox);
      }
   
   // The buttonPanel method builds the bottun panel.
      private void buildButtonPanel()
      {
      // Create a panel.
         buttonPanel = new JPanel();
      
      // Create a button.
         calcButton = new JButton("Calculate");
      
      // Register an action listener with the button.
         calcButton.addActionListener(new ButtonListener());
      
      // Add the button to the panel.
         buttonPanel.add(calcButton);
      }
   
   // The buildSelectedDormPanel builds the selected totalCharges panel.
      private void buildSelectedTotalChargesPanel()
      {
      // Create the totalChargesPanel for the label.      
         totalChargesPanel = new JPanel();
         label1 = new JLabel("Total charges per semester: ");
      
      // Create the totalCharges textfield.        
         totalCharges = new JTextField (25);
         totalCharges.setEditable(false);
      
      // Add the totalChargesPanel to the panel.      
         totalChargesPanel.add(label1);
         totalChargesPanel.add(totalCharges);
      }
   
   
   /** Private inner class that handles the event when the user 
   		 selects the dorm and meal boxes.
    */
      private class ComboBoxListener implements ActionListener
      {
         public void actionPerformed(ActionEvent e) 
         {
         // Variables to hold the dorm, meal, and total charges.        
            String dorm = (String) dormBox.getSelectedItem();
            String meal = (String) mealBox.getSelectedItem();
         
         // Calculates the total.
            totalCharges.setText(meal + dorm);
         }
      }
      private class ButtonListener implements ActionListener
      {
         public void actionPerformed(ActionEvent e) 
         {
         // Any ideas on how I would could this to add the  
			// selection in each box and put it in the totat
			// charges label?
         }
      }
   
      public static void main(String[] args)
      {
         new Main();
      }
   }