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Conformed to Java conventions and updated SnackBar directory. #9

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Conformed to Java conventions and updated SnackBar directory. #9

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74 changes: 39 additions & 35 deletions src/main/java/chapter09/snackbar/SnackBar.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,21 +5,19 @@
import java.awt.event.*;
import javax.swing.*;

public class SnackBar extends JFrame
implements ActionListener
{
private static final String MY_PASSWORD = "jinx";
private VendingMachine machine1, machine2, machine3;
public class SnackBar extends JFrame implements ActionListener {
private static final String PASSWORD = "jinx";
private VendingMachine machine1;
private VendingMachine machine2;
private VendingMachine machine3;

public SnackBar()
{
public SnackBar() {
super("Snack Bar");

Color brandColor1 = new Color(130, 30, 10); // r, g, b
Color brandColor1 = new Color(130, 30, 10);
Color brandColor2 = new Color(255, 180, 0);
Color brandColor3 = new Color(90, 180, 0);

// Load the coin icon for the vending machine buttons:
ImageIcon coin = new ImageIcon("coin.gif");

machine1 = new VendingMachine("Java", brandColor1, 45, coin);
Expand Down Expand Up @@ -48,40 +46,46 @@ public SnackBar()
}

/**
* Password field: user strikes <Enter>
* This method is called whenever a component with this {@link SnackBar} registered on it fires
* an {@link ActionEvent}.
* <p>
* Since {@link SnackBar} inherits {@link ActionListener} using the {@code implements} keyword,
* it must have a {@code public void actionPerformed(ActionEvent)} method. Components can
* register it by passing {@code this} as an {@link ActionListener} to an
* {@code addActionListener} method if they have one.
*
* @see chapter11 Chapter 11 - Class Hierarchies and Interfaces
*/
public void actionPerformed(ActionEvent e)
{
JPasswordField password = (JPasswordField)e.getSource();
String word = new String(password.getPassword());
password.setText("");
if (MY_PASSWORD.equals(word))
{
// double amt = Vendor.getTotalSales();
machine1.reload();
machine2.reload();
machine3.reload();
JOptionPane.showMessageDialog(null,
// String.format("Total sales: $%.2f\n", amt) +
"Machines reloaded",
"Service", JOptionPane.INFORMATION_MESSAGE);
}
else
{
JOptionPane.showMessageDialog(null,
@Override
public void actionPerformed(ActionEvent e) {
JPasswordField passwordField = (JPasswordField) e.getSource();
String word = new String(passwordField.getPassword());
passwordField.setText("");

if (!PASSWORD.equals(word)) {
JOptionPane.showMessageDialog(this, // SnackBar inherits from a JFrame, so it is the parent
"Login failed", "Service", JOptionPane.ERROR_MESSAGE);
return;
}
}

// *****************************************************
// double amt = Vendor.getTotalSales();
machine1.reload();
machine2.reload();
machine3.reload();
JOptionPane.showMessageDialog(
this,
// String.format("Total sales: $%.2f\n", amt) +
"Machines reloaded",
"Service",
JOptionPane.INFORMATION_MESSAGE
);
}

public static void main(String[] args)
{
public static void main(String[] args) {
SnackBar window = new SnackBar();
window.setBounds(50, 50, 520, 310);
window.setDefaultCloseOperation(EXIT_ON_CLOSE);
window.setResizable(false);
window.setVisible(true);
}
}

}
66 changes: 32 additions & 34 deletions src/main/java/chapter09/snackbar/VendingMachine.java
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Original file line number Diff line number Diff line change
Expand Up @@ -5,25 +5,24 @@
import java.awt.event.*;
import javax.swing.*;

public class VendingMachine extends JPanel
implements ActionListener
{
public class VendingMachine extends JPanel implements ActionListener {
private static final int FULL_STOCK = 5;
private JButton deposit25c, deposit10c, deposit5c, go;
private JButton deposit25c;
private JButton deposit10c;
private JButton deposit5c;
private JButton go;
private JTextField display;
private Vendor vendor;
boolean trayFull;
Color brandColor;
String brandName;

public VendingMachine(String brand, Color color, int price, ImageIcon coin)
{
public VendingMachine(String brand, Color color, int price, ImageIcon coin) {
setBackground(Color.WHITE);
brandColor = color;
brandName = brand;

JTextField banner = new JTextField(" " + brandName +
" " + price + "c ");
JTextField banner = new JTextField(" " + brandName + " " + price + "c ");
banner.setEditable(false);
banner.setFont(new Font("Serif", Font.BOLD, 14));
banner.setHorizontalAlignment(JTextField.CENTER);
Expand Down Expand Up @@ -68,53 +67,51 @@ public VendingMachine(String brand, Color color, int price, ImageIcon coin)
vendor = new Vendor(price, FULL_STOCK);
}

public void reload()
{
public void reload() {
vendor.setStock(FULL_STOCK);
display.setText(" " + vendor.getDeposit() + " ");
repaint();
}

public void actionPerformed(ActionEvent e)
{
JButton b = (JButton)e.getSource();
@Override
public void actionPerformed(ActionEvent e) {
JButton button = (JButton) e.getSource();

if (b == deposit25c)
if (button == deposit25c) {
vendor.addMoney(25);
else if (b == deposit10c)
} else if (button == deposit10c) {
vendor.addMoney(10);
else if (b == deposit5c)
} else if (button == deposit5c) {
vendor.addMoney(5);
else if (b == go)
{
} else if (button == go) {
trayFull = vendor.makeSale();
int change = vendor.getChange();
if (trayFull) // Successful sale
{
if (trayFull) {
// Successful sale
repaint();
JOptionPane.showMessageDialog(null,
"Enjoy your " + brandName + "\n" + " Change " + change + "c",
"Enjoy " + brandName, JOptionPane.PLAIN_MESSAGE);
trayFull = false;
}
else if (change > 0) // Refund
{
} else if (change > 0) {
// Refund
JOptionPane.showMessageDialog(null,
"Take " + change + "c back",
"Money back", JOptionPane.ERROR_MESSAGE);
}
}

if (vendor.getStock() > 0)
if (vendor.getStock() > 0) {
display.setText(" " + vendor.getDeposit() + " ");
else
} else {
display.setText("Call service ");
}

repaint();
}

public void paintComponent(Graphics g)
{
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);

final int x0 = getWidth() / 12;
Expand All @@ -124,14 +121,15 @@ public void paintComponent(Graphics g)
g.setColor(Color.BLACK);
g.drawRect(x0, y0, 28, FULL_STOCK * yStep + 4);

int y = y0 + 4, x = x0 + 4;
int y = y0 + 4;
int x = x0 + 4;
int stock = vendor.getStock();
int count = FULL_STOCK;

while (count > 0)
{
if (count <= stock)
while (count > 0) {
if (count <= stock) {
drawCan(g, x, y);
}
y += yStep;
count--;
}
Expand All @@ -140,12 +138,12 @@ public void paintComponent(Graphics g)
y += yStep;
g.drawRect(x0, y - 4, 28, 18);

if (trayFull)
if (trayFull) {
drawCan(g, x, y);
}
}

private void drawCan(Graphics g, int x, int y)
{
private void drawCan(Graphics g, int x, int y) {
g.setColor(brandColor);
g.fillRoundRect(x, y, 20, 10, 4, 4);
g.setColor(Color.WHITE);
Expand Down
90 changes: 32 additions & 58 deletions src/main/java/chapter09/snackbar/Vendor.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,104 +2,78 @@
package chapter09.snackbar;

/**
* This class implements a vendor that sells one kind
* of items. A vendor carries out sales transactions.
* This class implements a vendor that sells one kind of items. A vendor carries out sales transactions.
*/

public class Vendor
{
private final int price; //the price of a single item in cents
private int stock; //number of items to place in stock
private int deposit; //number of cents deposited
private int change; //number of cents currently in change
public class Vendor {
private final int price;
private int stock;
private int deposit;
private int change;

/**
* Constructs a Vendor
*
* Constructs a Vendor.
* @param price the price of a single item in cents (int)
* @param stock number of items to place in stock (int)
*/
public Vendor(int price, int stock)
{
public Vendor(int price, int stock) {
this.price = price;
this.stock = stock;
}

/**
* Returns the number of items currently in stock.
*
* @return number of items currently in stock (int)
* @return The number of items currently in stock.
*/
public int getStock()
{
public int getStock() {
return stock;
}

/**
* Sets the quantity of items in stock.
*
* @param qty number of items to place in stock (int)
* @param qty The number of items to place in stock.
*/
public void setStock(int qty)
{
public void setStock(int qty) {
stock = qty;
}

/**
* Implements a sale. If there are items in stock and
* the deposited amount is greater than or equal to
* the single item price, then adjusts the stock
* and calculates and sets change and returns true;
* otherwise refunds the whole deposit (moves it into
* change) and returns false.
*
* @return true for a successful sale, false otherwise (boolean)
* Makes a sale depending on the current contents of the stock and deposit field. If the deposited
* amount is greater than the price, the change is moved into the change field.
* @return {@code true} if the sale was successful and {@code false} otherwise.
*/
public boolean makeSale()
{
if (stock > 0 && deposit > price)
{
public boolean makeSale() {
boolean saleIsSuccess = stock > 0 && deposit > price;

if (saleIsSuccess) {
change = deposit - price;
deposit = 0;
stock--;
return true;
} else {
change = deposit;
}
change = deposit;
deposit = 0;
return false;
return saleIsSuccess;
}

/**
* Adds a specified amount (in cents) to the
* deposited amount.
*
* @param number of cents to add to the deposit (int)
* @param cents The number of cents to be added to the deposit.
*/
public void addMoney(int number)
{
deposit += number;
public void addMoney(int cents) {
deposit += cents;
}

/**
* Returns and zeroes out the amount of change (from
* the last sale or refund).
*
* @return number of cents in the current change (int)
* Takes and clears the money in the change box.
* @return The number of cents taken from the change box.
*/
public int getChange()
{
int tempchange = change;
public int getChange() {
int tempChange = change;
change = 0;
return tempchange;
return tempChange;
}

/**
* Returns the currently deposited amount (in cents).
*
* @return number of cents in the current deposit (int)
* @return The number of cents in the deposit.
*/
public int getDeposit()
{
public int getDeposit() {
return deposit;
}
}