// Libraries
import java.text.DecimalFormat;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class DormMealCaclGUI extends JFrame {

// Create memebrs
private DormPrices dorm;            // To display dorm prices and selections
private MealPlans meals;                // To display meal plan prices and selections
private JPanel buttonPanel;         // Holds calculate and exit buttons
private JButton calcButton;         // To calculate costs
private JButton exitButton;         // To exit application window when done

public DormMealCaclGUI(){
    // Set Title
    setTitle("Univsersity Dorm & Meal Plan Calculator");

    // Specify action for application close
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    // Create border layout manager
    setLayout(new BorderLayout());

    // Create custom panels
    dorm = new DormPrices();
    meals = new MealPlans();

    // Create button panel
    buildButtonPanel();

    // Add components to pane
    add(dorm, BorderLayout.WEST);
    add(meals, BorderLayout.EAST);
    add(buttonPanel, BorderLayout.SOUTH);

    // Pack contents and display
    pack();
    setVisible(true);

} // end constructor

// This construtor will build the button panel
public void buildButtonPanel(){
    // Create panel
    buttonPanel = new JPanel();

    // Create Buttons
    calcButton = new JButton("Calculate");
    exitButton = new JButton("Exit");

    // Register action listeners
    calcButton.addActionListener(new CalcButtonListener());
    exitButton.addActionListener(new ExitButtonListener());

    // Add buttons to panel
    buttonPanel.add(calcButton);
    buttonPanel.add(exitButton);

} // end build button panel constructor

// Private inner class to handle calcButton action events
private class CalcButtonListener implements ActionListener{
    public void actionPerformed(ActionEvent e){

        int total = 0;                  // holds overall total for dorm and meal plan selections

        // Calculate total
        total = dorm.actionCalculate() + meals.getMealPlanCost();

        // Create DecimalFormat objetc
        DecimalFormat cost = new DecimalFormat("##00.00");


        // Display total
        JOptionPane.showMessageDialog(null, "Dorm & Meal Plan Total: $" + cost.format(total));

    } // end action performed method

} // end calc button listener class

// Private inner class to handle exitButton action events
private class ExitButtonListener implements ActionListener{
    public void actionPerformed(ActionEvent e){
        System.exit(0);
    } // end method
}// end exit button listener class

public static void main(String[] args) {

    new DormMealCaclGUI();

} // end main method

}// end class

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

public class DormPrices extends JPanel {

// Constant variables used for calculating cost
public final int ALLEN_HALL = 1500;
public final int PIKE_HALL = 1600;
public final int FARTHING_HALL = 1200;
public final int UNI_SUITES = 1800;

// Create combo box to allow user to select dorm
// user only allowed to select one dorm per calculation
public final String [] dormNames = {"Allen Hall", "Pike Hall", "Farthing Hall", "University Suites"};
private JComboBox dorms;            // Combo box for dorm options
private JLabel label1;              // label to display results
private JTextField selectedDorm;    // text field to hold selected dorm


// Constructor to build panel
public DormPrices(){

    // Set new layout to GridLayout manager with 4 rows and 1 column
    setLayout(new GridLayout(4,1));

    // Create combo box, lable and text field
    dorms = new JComboBox<String>(dormNames);
    label1 = new JLabel("Dorm Selected: ");
    selectedDorm = new JTextField(12);
    selectedDorm.setEditable(false);

    // Add border to panel
    setBorder(BorderFactory.createTitledBorder("Dorm Hall Prices"));

    // Create action listener
    dorms.addActionListener(new ComboBoxListener());

    // Add components to panel
    add(dorms);
    add(label1);
    add(selectedDorm);

} // end dorm prices constructor

// this inner privtae class will handle the event of an itme being selected from the combo box
private class ComboBoxListener implements ActionListener{
    public void actionPerformed(ActionEvent e){
        // Get seleted dorm name
        String dormSelection = (String)dorms.getSelectedItem();

        // Display selection
        selectedDorm.setText(dormSelection);

    } // end method

}// end class

// this method will pass the total of the dorm selected
public int actionCalculate(){
    // Variable
    int dormTotal = 0;                  // this holds an initial value for dorm hall cost

    if(selectedDorm.getText() == "Allen Hall")
        dormTotal = ALLEN_HALL;

    else if(selectedDorm.getText() == "Pike Hall")
        dormTotal = PIKE_HALL;

    else if(selectedDorm.getText() == "Farthing Hall")
        dormTotal = FARTHING_HALL;

    else if(selectedDorm.getText() == "University Suites")
        dormTotal = UNI_SUITES;


    return dormTotal;

}


} // end DormPrices clas

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

public class MealPlans extends JPanel{

public final int SEVEN_MEALS_PER_WEEK = 560;
public final int FRTN_MEALS_PER_WEEK = 1095;
public final int UNLIMITED_MEALS = 1500;

// Create combo box to allow user to select dorm
// user only allowed to select one dorm per calculation
public final String [] mealPlan = {"7 Meals per week", "14 Meals per week", "Unlimited Meals"};
private JComboBox meal;         // Combo box for dorm options
private JLabel label2;              // label to display results
private JTextField selectedMeal;    // text field to hold selected dorm



public MealPlans() {
    // Set new layout to GridLayout manager with 3 rows and 1 column
    setLayout(new GridLayout(3,1));

    // Create combo box, label and text field
    meal = new JComboBox<String>(mealPlan);
    label2 = new JLabel("Meal Plan Selected: ");
    selectedMeal = new JTextField(20);
    selectedMeal.setEditable(false);

    // Add border to panel
    setBorder(BorderFactory.createTitledBorder("Meal Plan Prices"));

    // Create action listener
    meal.addActionListener(new ComboBoxListener());

    // Add components to panel
    add(meal);
    add(label2);
    add(selectedMeal);
}

// this inner privtae class will handle the event of an item being selected from the combo box
private class ComboBoxListener implements ActionListener{
    public void actionPerformed(ActionEvent e){
        // Get seleted meal plan name
        String mealSelection = (String)meal.getSelectedItem();

        // Display selection
        selectedMeal.setText(mealSelection);

    } // end method

}// end class




public int getMealPlanCost() {
    // Variable
    int mealTotal = 0;                  // this holds an initial value for meal plan cost

    if(selectedMeal.getText() == "7 Meals per week")
        mealTotal = SEVEN_MEALS_PER_WEEK;

    else if(selectedMeal.getText() == "14 Meals per week")
        mealTotal = FRTN_MEALS_PER_WEEK;

    else if(selectedMeal.getText() == "Unlimited Meals")
        mealTotal = UNLIMITED_MEALS;



    return mealTotal;

} // end method

} // end class