committed.

src/Frame.java

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+import javax.sound.sampled.*;
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.*;
+import java.io.File;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JOptionPane;
+
+public class Frame {
+
+    // variables declaration and initialization
+    private static JButton play = new JButton("PLAY");
+    private static JButton quit = new JButton("QUIT");
+    private static JButton enter = new JButton("ENTER");
+
+    private static JLabel lblGuess = new JLabel("Enter your guess:");
+    private static JLabel errorMsg = new JLabel("");
+
+    private static JTextField guessField = new JTextField(10);
+
+    private static JLabel interval = new JLabel();
+    private static JFrame main, f2;
+
+    static int tries, start, end, randomNum;
+    static Interval ivl;
+
+    private static void GUI() {
+
+        main = new JFrame("Game");
+        f2 = new JFrame("Game");
+        main.setSize(280, 150);
+        f2.setSize(600, 330);
+        main.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        f2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        // buttons layout
+        main.setLayout(new FlowLayout(FlowLayout.CENTER, 40, 40));
+        main.add(play);
+        main.add(quit);
+        main.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
+
+        // make buttons work
+        makePlayWork();
+        makeQuitWork();
+        makeEnterWork();
+
+        // center windows
+        main.setLocationRelativeTo(null);
+        f2.setLocationRelativeTo(null);
+
+        main.setVisible(true);
+    }
+
+    // place buttons, text labels, and text fields
+    private static void placeStuff() {
+
+        f2.setLayout(new GridBagLayout());
+        GridBagConstraints gbc = new GridBagConstraints();
+        gbc.gridwidth = GridBagConstraints.REMAINDER;
+
+        gbc.insets = new Insets(35, 0, 30, 0);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.gridx = 0;
+        gbc.gridy = 0;
+        f2.add(interval, gbc);
+
+        gbc.insets = new Insets(35, 0, 0, 0);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.gridx = 0;
+        gbc.gridy = 1;
+        f2.add(lblGuess, gbc);
+
+        gbc.insets = new Insets(5, 0, 0, 0);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.ipady = 10;
+        gbc.gridx = 0;
+        gbc.gridy = 3;
+        f2.add(guessField, gbc);
+
+        gbc.insets = new Insets(0, 0, 0, 0);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.gridx = 0;
+        gbc.gridy = 4;
+        f2.add(errorMsg, gbc);
+
+        gbc.insets = new Insets(15, 0, 10, 0);
+        gbc.fill = GridBagConstraints.HORIZONTAL;
+        gbc.gridx = 0;
+        gbc.gridy = 5;
+        f2.add(enter, gbc);
+    }
+
+    private static void secondFrame() {
+
+        main.dispose();
+        placeStuff();
+
+        // accepts only numeric digits and no other keys
+        guessField.addKeyListener(new KeyAdapter() {
+            @Override
+            public void keyTyped(KeyEvent ke) {
+                char c = ke.getKeyChar();
+                if ((c < '0') || (c > '9')) {
+                    ke.consume();
+                    if (Character.isLetter(c)) {
+                        errorMsg.setText("Invalid input");
+                        errorMsg.setForeground(Color.RED);
+                    }
+                } else errorMsg.setForeground(f2.getBackground());
+            }
+        });
+
+        guessField.setHorizontalAlignment(JTextField.CENTER);
+        guessField.setFont(new Font("Arial", Font.PLAIN, 20));
+        interval.setFont(new Font("Arial", Font.BOLD, 25));
+        ivl = new Interval(0, 100);
+        start = ivl.getStart();
+        end = ivl.getEnd();
+        randomNum = (int) (Math.random() * (end - start + 1) + start);
+        updateInterval();
+        JOptionPane.showMessageDialog(f2, "Welcome to BINGO! A random number has been " +
+                "generated 1 and 100.", "BINGO! Welcome Message", JOptionPane.INFORMATION_MESSAGE, null);
+        playSound("start.wav");
+        f2.setVisible(true);
+        f2.getRootPane().setDefaultButton(enter);
+    }
+
+    // from http://suavesnippets.blogspot.com/2011/06/add-sound-on-jbutton-click-in-java.html
+    private static void playSound(String soundName)
+    {
+        try
+        {
+            AudioInputStream audioInputStream = AudioSystem.getAudioInputStream(new File(soundName).getAbsoluteFile());
+            Clip clip = AudioSystem.getClip();
+            clip.open(audioInputStream);
+            clip.start();
+        }
+        catch(Exception ex)
+        {
+            System.out.println("Error with playing sound.");
+            ex.printStackTrace();
+        }
+    }
+
+    // action listener for play button
+    private static void makePlayWork() {
+        play.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                playSound("start.wav");
+                playSound("logon.wav");
+                secondFrame();
+            }
+        });
+    }
+
+    // action listener for quit button
+    private static void makeQuitWork() {
+        quit.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                playSound("start.wav");
+                int confirmation = JOptionPane.showConfirmDialog(null, "Are you sure" +
+                        " you want to quit the game?", "Exit Game?", JOptionPane.YES_NO_CANCEL_OPTION);
+                if (confirmation == JOptionPane.YES_OPTION) {
+                    playSound("start.wav");
+                    playSound("logoff.wav");
+                    main.dispose();
+                } else playSound("start.wav");
+            }
+        });
+    }
+
+    // action listener for enter button
+    private static void makeEnterWork() {
+        enter.addActionListener(new ActionListener() {
+            public void actionPerformed(ActionEvent e) {
+                playSound("start.wav");
+                if (!guessField.getText().equals("")) {
+                    int guessNum = Integer.parseInt(guessField.getText());
+                    if (ivl.withinBoundary(guessNum)) {
+                        if (guessNum != randomNum) {
+                            playSound("chord.wav");
+                            tries++;
+                            ivl.updateInterval(guessNum, randomNum);
+                            JOptionPane.showMessageDialog(null, "WRONG!", "ERROR", JOptionPane.ERROR_MESSAGE);
+                            updateInterval();
+                        } else {
+                            playSound("tada.wav");
+                            JOptionPane.showMessageDialog(null, "BINGO! The secret number is " + guessNum + ". And it took you " + tries + " trial(s).");
+                            playSound("ding.wav");
+                            int res = JOptionPane.showConfirmDialog(null, "Would you like to play again?", "One More?", JOptionPane.YES_NO_OPTION);
+                            if (res == JOptionPane.YES_OPTION) {
+                                playSound("start.wav");
+                                gameReset();
+                                playSound("logon.wav");
+                                JOptionPane.showMessageDialog(null, "A new game has started. Good Luck!");
+                                playSound("start.wav");
+                            } else {
+                                playSound("start.wav");
+                                JOptionPane.showMessageDialog(null, "Thanks for your participation! Please come again!");
+                                playSound("start.wav");
+                                playSound("logoff.wav");
+                                System.exit(0);
+                            }
+                        }
+                    } else {
+                        playSound("critical-stop.wav");
+                        JOptionPane.showMessageDialog(null, "OUT OF BOUNDARY!", "ERROR", JOptionPane.ERROR_MESSAGE);
+                        playSound("start.wav");
+                    }
+                    guessField.setText("");
+                }
+            }
+        });
+    }
+
+    // update interval displayed
+    private static void updateInterval() {
+        interval.setText(ivl.getStart() + "         -         " + ivl.getEnd());
+    }
+
+    // function for resetting game
+    private static void gameReset() {
+        tries = 0;
+        ivl = new Interval(0, 100);
+        updateInterval();
+    }
+
+    public static void main(String[] args) { GUI(); }
+
+
+}