import java.awt.*;
import java.applet.*;
import java.awt.event.*;  // import statement

public class VendMachine extends Applet implements ActionListener

{
    double total_amount = 0.0;      // Display total momey amount
    double product_price;           // Display Selection Product Price
    int i = 1;                      // Declare Case Switch prarameter
    VendingMachine c;
 
    public void init ()
    {
        Panel VendMachine = new Panel ();          // Creat new panel
        add (VendMachine);                     // Layout pVendMachine

        VendingMachine.Cd.addActionListener (this); //Register Production Selection Button
        VendingMachine.Floopy.addActionListener (this);

        VendingMachine.Dollar.addActionListener (this); //Register Money Button
        VendingMachine.Quarter.addActionListener (this);
        VendingMachine.Dime.addActionListener (this);
        VendingMachine.Nickel.addActionListener (this);
        VendingMachine.Penny.addActionListener (this);

        VendingMachine.Cancel.addActionListener (this);      //Register Cancel Button
        VendingMachine.Change.addActionListener (this);      //Register Accept Button

    } // end of init method


    public void actionPerformed (ActionEvent Vent)
    {
        if (Vent.getSource () == VendingMachine.Dollar)         //Action for Dollar button
        {
            total_amount = 1.00 + total_amount;             //Display total amount
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            if (product_price != 0)         //Condition for display accept message
                VendingMachine.Message.setText ("Please Push Change Button");
        }
        if (Vent.getSource () == VendingMachine.Quarter)                //Action for Quarter button
        {
            total_amount = 0.25 + total_amount;
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            if (total_amount >= product_price && product_price != 0) //Condition for display message
                VendingMachine.Message.setText ("Please Push Change Button");
        }
        if (Vent.getSource () == VendingMachine.Dime)                           //Action for Dime button
        {
            total_amount = 0.10 + total_amount;
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            if (total_amount >= product_price && product_price != 0)
                VendingMachine.Message.setText ("Please Push Change Button");
        }
        if (Vent.getSource () == VendingMachine.Nickel)                          //Action for Nicke button
        {
            total_amount = .05 + total_amount;
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            if (total_amount >= product_price && product_price != 0)
                VendingMachine.Message.setText ("Please Push Change Button");
        }
        if (Vent.getSource () == VendingMachine.Penny)                          //Action for Nicke button
        {
            total_amount = .01 + total_amount;
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            if (total_amount >= product_price && product_price != 0)
                VendingMachine.Message.setText ("Please Push Change Button");
        }

        //  Product Selection Action
        if (Vent.getSource () == VendingMachine.Cd && VendingMachine.Cd_count > 0)       //Action for Pepsi button (condition for stock counting)
        {
            VendingMachine.Message.setText ("Cd, please deposit $1.75");
            VendingMachine.Amount.setText ("Your Money Input:  $" + total_amount);
            product_price = 1.75;
            i = 1;                  // For Switch case parameter(stock counting)
            if (total_amount >= product_price)      // Condition for display accept button
              VendingMachine.Message.setText ("Cd, please Push Accept Button");
        }
        if (Vent.getSource () == VendingMachine.Floopy)         //Action for Coke button
        {
            VendingMachine.Message.setText ("Floopy, please deposit $1.00");
            VendingMachine.Amount.setText ("Your Money Input:   $" + total_amount);
            product_price = 1.00;
            i = 2;
            if (total_amount >= product_price)      // Condition for display accept button
                VendingMachine.Message.setText ("Floopy, please Push Change Button");
        }

        //  Accept and Cancel Function Action
        if (Vent.getSource () == VendingMachine.Cancel)
        {
            total_amount = 0;
            VendingMachine.Message.setText ("Your order have been cancel.");
        }
        if (Vent.getSource () == VendingMachine.Change)
        {
            total_amount = total_amount - product_price;       //Total input amount - product_price
            if ((product_price == 0.5 && total_amount == -0.5) || product_price == 0.8 && total_amount == -.8)
                //Condition for insufficient fund
                {
                    VendingMachine.Message.setText ("Please deposit $" + product_price + " in total.");
                    total_amount = 0;
                   VendingMachine.Amount.setText ("Not input money yet");
                }

            else if (product_price > 0 && (total_amount < 0 && total_amount >= -.45)
                    || (total_amount < 0 && total_amount >= -.75))
            {
                VendingMachine.Message.setText ("Please deposit $" + product_price + " in total.");
                total_amount = total_amount + product_price;
                VendingMachine.Amount.setText ("Not enough money");
            }
            else if (product_price > 0 && total_amount == 0)        //For no change function
            {
                VendingMachine.Amount.setText ("No Change");
                total_amount = 0;
                product_price = 0;
                VendingMachine.Cd_count--;
                VendingMachine.Cdstock.setText ("Cd Stock =  " + VendingMachine.Cd_count); //Display stock quan.
                VendingMachine.Floopystock.setText ("Floopy Stock = " + VendingMachine.Floopy_count);
            }
            else if (product_price > 0 && total_amount > 0)         //For change receive function
            {
                VendingMachine.Amount.setText ("Your Change: $" + total_amount);
                total_amount = 0;
                product_price = 0;
                VendingMachine.Floopy_count--;
                VendingMachine.Cdstock.setText ("Cd Stock =  " + VendingMachine.Cd_count);
                VendingMachine.Floopystock.setText ("Floopy Stock = " + VendingMachine.Floopy_count);
            }
        } //end of Accept action

    } //end of actionPerform
}

import java.awt.*;

public class VendingMachine extends Panel //Applet implements ActionListener

{
    public static int Cd_count = 20;             // Stock with 5 quantities of products each
    public static int Floopy_count = 20;
    public static Label Amount;                   // Declare lMessage Label

    public static Label Cdstock;
    public static Label Floopystock;

    public void Stock ()
    {
        setLayout (new GridLayout (4, 1));
        setBackground (Color.yellow);
        Cdstock = new Label ("Cd Stock = " + Cd_count);   // Stock Quantities Label
        Floopystock = new Label ("Floopy Stock = " + Floopy_count);
        Amount = new Label ("*****Total Amount****");
        Amount.setAlignment (Label.CENTER);
        Amount.setBackground (Color.blue);
        Amount.setForeground (Color.white);
        add (Amount);
        add (Cdstock);
        add (Floopystock);
    } // end of Pstock method


    public static Button Cd;                   // Declare product selection button
    public static Button Floopy;


    // Creat labels for three product's names
    public static Label lCd = new Label ("Cd"),
        lFloopy = new Label ("Floopy");
    public static Label Price1 = new Label ("$1.50"),  // Creat labels for product's price
        Price2 = new Label ("$1.00");
    public static Label Name = new Label ("Daniel's Vending Machine"); // Creat new label
    public static Label Message = new Label ("****Display Message****");

    public void Product ()
    {
        setLayout (new BorderLayout ());
        Panel pHolding = new Panel ();           // Creat a panel to hold product selections
        pHolding.setLayout (new GridLayout (3, 3)); // Ensure panel's layout 3 columns and 3 rows
        pHolding.setBackground (Color.red);     // Background = red
        pHolding.setForeground (Color.blue);    // Foreground = blue

        lCd.setAlignment (Label.CENTER);     // All Label Alignment - Center
        lFloopy.setAlignment (Label.CENTER);
        Price1.setAlignment (Label.CENTER);
        Price2.setAlignment (Label.CENTER);
        Name.setAlignment (Label.CENTER);
        Message.setAlignment (Label.CENTER);
        Message.setBackground (Color.pink);

        pHolding.add (lCd);                  // Add 1st product's name, price & button
        pHolding.add (Price1);
        Cd = new Button ("A");
        pHolding.add (Cd);

        pHolding.add (lFloopy);           // Add 2nd product's name, price & button
        pHolding.add (Price2);
        Floopy = new Button ("B");
        pHolding.add (Floopy);

        add ("North", Name);
        add ("Center", pHolding);
        add ("South", Message);

    } // Pselection


    public static Button Dollar;                  // Declare money function button
    public static Button Quarter;
    public static Button Dime;
    public static Button Nickel;
    public static Button Penny;

    public void Money ()
    {
        setLayout (new GridLayout (4, 1)); // Ensure 1 column & 4 row

        Dollar = new Button ("Dollar");
        Quarter = new Button ("Quarter");
        Dime = new Button ("Dime");
        Nickel = new Button ("Nickel");
        Penny = new Button ("Penny");
        add (Dollar);                  // add 4 Buttons
        add (Quarter);
        add (Dime);
        add (Nickel);
        add (Penny);

    } // end of Pmoney method


    public static Button Cancel;                 // Declare Cancel and Accept button
    public static Button Change;

    public void Function ()
    {

        Change = new Button ("Change");        // Creat new button
        Cancel = new Button ("Cancel");        // Creat new button
        add (Change);                  // Add bAccept on pControl
        add (Cancel);                  // Add bCancel on pControl
        setForeground (Color.black);    // Foregrond Color = black

    } // Pmoney method
} // Pmoney method