mcdonald.java

一个简单的模拟KFC点餐系统,可以对APPLET进行详细的了解.

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class McDonald
    extends JFrame
    implements FocusListener, ItemListener, ActionListener, Runnable {
  Thread t;
  JLabel lbl1, lbl2, lbl3, lbl4, lbl5, lbl6, lbl7, lbl8, co;
  JTextField txt1, txt2, txt3, txt4, txt5, txt6;
  JTextArea tat1;
  JRadioButton rd1, rd2;
  JCheckBox chk1, chk2, chk3, chk4, chk5, chk6, chk7, chk8;
  JComboBox cbo1;
  JButton cmd1, cmd2;
  ButtonGroup bg;
  JPanel pan1, pan2, pan3, pan4;
  String gstr1 = "";
  String gstr[] = {
      "Today", "Tomarrow", "day after tomarrow"};
  McDonald() {
    t = new Thread(this);
    setBounds(50, 50, 450, 560);
    getContentPane().setLayout(new BorderLayout());
    pan1 = new JPanel();
    pan2 = new JPanel();
    pan3 = new JPanel();
    pan1.setLayout(new FlowLayout());
    lbl1 = new JLabel("", new ImageIcon("images\\mc_logo.gif"),
                      JLabel.CENTER);
    co = new JLabel("Date");
    getContentPane().add("North", pan1);
    getContentPane().add("Center", pan2);
    getContentPane().add("South", pan3);
    pan1.add(lbl1);
    pan1.add(co);

    pan2.setLayout(null);
    pan3.setLayout(new FlowLayout());

    lbl2 = new JLabel("Customer Name: ");
    lbl2.setBounds(20, 40, 150, 20);
    pan2.add(lbl2);
    txt1 = new JTextField();
    txt1.setBounds(180, 40, 200, 20);
    pan2.add(txt1);
    txt1.addFocusListener(this);
    lbl3 = new JLabel("Current Address: ");
    lbl3.setBounds(20, 65, 150, 20);
    pan2.add(lbl3);
    tat1 = new JTextArea("", 150, 70);
    tat1.setLineWrap(true);
    JScrollPane jp = new JScrollPane(tat1);
    pan2.add(jp);
    jp.setBounds(180, 65, 200, 70);
    lbl4 = new JLabel("Phone Number: ");
    lbl4.setBounds(20, 140, 150, 20);
    pan2.add(lbl4);
    txt2 = new JTextField();
    txt2.setBounds(180, 140, 200, 20);
    pan2.add(txt2);
    txt2.addFocusListener(this);
    lbl5 = new JLabel("Email id: ");
    lbl5.setBounds(20, 165, 150, 20);
    pan2.add(lbl5);
    txt3 = new JTextField();
    txt3.setBounds(180, 165, 200, 20);
    pan2.add(txt3);
    txt3.addFocusListener(this);

    bg = new ButtonGroup();
    rd1 = new JRadioButton("Pizza");
    bg.add(rd1);
    rd1.setBounds(40, 190, 100, 20);
    pan2.add(rd1);
    rd2 = new JRadioButton("Burger");
    bg.add(rd2);
    rd2.setBounds(180, 190, 80, 20);
    pan2.add(rd2);
    rd1.addItemListener(this);
    rd2.addItemListener(this);

    lbl6 = new JLabel(" ", new ImageIcon("images\\pizza.jpg"), JLabel.CENTER);
    lbl6.setBounds(280, 190, 150, 80);
    pan2.add(lbl6);

    ButtonGroup bg1 = new ButtonGroup();
    chk1 = new JCheckBox("Capcicum Pizza");
    chk1.setBounds(10, 220, 130, 20);
    chk2 = new JCheckBox("Cheese Pizza ");
    chk2.setBounds(140, 220, 130, 20);
    chk3 = new JCheckBox("Onion Pizza ");
    chk3.setBounds(10, 250, 130, 20);
    chk4 = new JCheckBox("Tomato Pizza ");
    chk4.setBounds(140, 250, 130, 20);
    bg.add(chk1);
    pan2.add(chk1);
    bg.add(chk2);
    pan2.add(chk2);
    bg.add(chk3);
    pan2.add(chk3);
    bg.add(chk4);
    pan2.add(chk4);

    chk5 = new JCheckBox("kampung burger");
    chk5.setBounds(10, 220, 130, 20);
    chk6 = new JCheckBox("Love Burger");
    chk6.setBounds(140, 220, 130, 20);
    chk7 = new JCheckBox("Mcpepper burger");
    chk7.setBounds(10, 250, 130, 20);
    chk8 = new JCheckBox("mctowkay burger");
    chk8.setBounds(140, 250, 130, 20);
    bg.add(chk5);
    pan2.add(chk5);
    bg.add(chk6);
    pan2.add(chk6);
    bg.add(chk7);
    pan2.add(chk7);
    bg.add(chk8);
    pan2.add(chk8);

    chk1.setVisible(false);
    chk2.setVisible(false);
    chk3.setVisible(false);
    chk4.setVisible(false);
    chk5.setVisible(false);
    chk6.setVisible(false);
    chk7.setVisible(false);
    chk8.setVisible(false);

    chk1.addItemListener(this);
    chk2.addItemListener(this);
    chk3.addItemListener(this);
    chk4.addItemListener(this);
    chk5.addItemListener(this);
    chk6.addItemListener(this);
    chk7.addItemListener(this);
    chk8.addItemListener(this);

    lbl7 = new JLabel("Cost: ");
    lbl7.setBounds(40, 280, 70, 20);
    pan2.add(lbl7);
    txt4 = new JTextField(100);
    txt4.setBounds(120, 280, 100, 20);
    txt4.setEditable(false);
    pan2.add(txt4);
    lbl8 = new JLabel("When u want delivery?:");
    lbl8.setBounds(40, 310, 200, 20);
    pan2.add(lbl8);
    cbo1 = new JComboBox(gstr);
    cbo1.setBounds(250, 310, 180, 20);
    pan2.add(cbo1);

    cmd1 = new JButton("Order");
    pan3.add(cmd1);
    cmd1.addActionListener(this);
    cmd2 = new JButton("Exit");
    pan3.add(cmd2);
    cmd2.addActionListener(this);
    t.start();
    this.setVisible(true);
  }

  public void run() {
    for (; ; ) {
      co.setText(new Date().toString());
    }
  }

  public void actionPerformed(ActionEvent e) {

    if (e.getSource() == cmd1) 
    {       
      if (txt1.getText().equals("") && txt2.getText().equals(""))
      {
      	EntryException a=new EntryException(this, txt1);
      }
      else
      {    
        
        boolean mbln1 = false;
        int a = 0, d = 0;
        boolean mbln2 = false;
        String email = txt3.getText();
        for (int minti1 = 0; minti1 < email.length(); minti1++) {
          char mc = email.charAt(minti1);
          if (mc == '@') {
            mbln2 = true;
            a = minti1;
          }
          if (mc == '.') {
            mbln1 = true;
            d = minti1;
          }
        }
        if ( (! (mbln2 & mbln1)) || (a > d)) {
          EntryException a1=new EntryException(this, txt3);
        }
        else
      {
         OrderWindow ow = new OrderWindow(txt1.getText(), gstr1, txt4.getText(),
                                       cbo1.getSelectedItem().toString());
      }
      }      
      
    }    
    
    
    if (e.getSource() == cmd2) 
    {
      t.stop();        
      System.exit(0);
    }
  }

  public void itemStateChanged(ItemEvent e) {
    if (e.getSource() == rd1) {
      gstr1 = "Pizza";
      chk1.setVisible(true);
      chk2.setVisible(true);
      chk3.setVisible(true);
      chk4.setVisible(true);
      chk5.setVisible(false);
      chk6.setVisible(false);
      chk7.setVisible(false);
      chk8.setVisible(false);
    }
    if (e.getSource() == rd2) {
      gstr1 = "Burger";
      chk1.setVisible(false);
      chk2.setVisible(false);
      chk3.setVisible(false);
      chk4.setVisible(false);
      chk5.setVisible(true);
      chk6.setVisible(true);
      chk7.setVisible(true);
      chk8.setVisible(true);
    }
    if (e.getSource() == chk1) {
      lbl6.setIcon(new ImageIcon("images\\pizza_cap.jpg"));
      txt4.setText("$10");
    }
    if (e.getSource() == chk2) {
      lbl6.setIcon(new ImageIcon("images\\pizza_cheese.jpg"));
      txt4.setText("$15");
    }
    if (e.getSource() == chk3) {
      lbl6.setIcon(new ImageIcon("images\\pizza_oni.jpg"));
      txt4.setText("$12");
    }
    if (e.getSource() == chk4) {
      lbl6.setIcon(new ImageIcon("images\\pizza_toma.jpg"));
      txt4.setText("$10");
    }
    if (e.getSource() == chk5) {
      lbl6.setIcon(new ImageIcon("images\\kampungburger_burger.jpg"));
      txt4.setText("$8");
    }
    if (e.getSource() == chk6) {
      lbl6.setIcon(new ImageIcon("images\\loveburger_burger.jpg"));
      txt4.setText("$14");
    }
    if (e.getSource() == chk7) {
      lbl6.setIcon(new ImageIcon("images\\mcpepper_burger.jpg"));
      txt4.setText("$10");
    }
    if (e.getSource() == chk8) {
      lbl6.setIcon(new ImageIcon("images\\mctowkay_burger.jpg"));
      txt4.setText("$18");
    }
  }

  public void focusLost(FocusEvent e) {
    try
    {   
           
    }
    catch (Exception e1) {}
  }

  public void focusGained(FocusEvent e) {
  }

  public static void main(String arg[]) {
    new McDonald();
  }

  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
}

class EntryException
    extends Exception
    implements ActionListener 
  {
  JFrame fra, fra1;
  JTextField txt;
  
  EntryException(JFrame fra, JTextField txt) {
    super("");
    this.fra = fra;
    fra.setEnabled(false);
    this.txt = txt;
    fra1 = new JFrame("ERROR");
    fra1.setBounds(200, 150, 200, 100);
    fra1.getContentPane().setLayout(new FlowLayout());
    JLabel lbl = new JLabel("Valid Data must be enter");
    JButton cmd3 = new JButton("OK");
    fra1.getContentPane().add(lbl);
    fra1.getContentPane().add(cmd3);
    cmd3.addActionListener(this);
    fra1.setVisible(true);    
    }

  public void actionPerformed(ActionEvent e1) {
    fra1.dispose();
    fra.setEnabled(true);
    txt.requestFocus();
    
  }
}

class OrderWindow
    extends JFrame
    implements ActionListener {
  JButton cmd4;
  OrderWindow(String mstrname, String mstritem, String mstrcost, String mstrday) {
    setBounds(50, 150, 480, 100);
    getContentPane().setLayout(new FlowLayout());
    JLabel lbl11 = new JLabel("Thanks " + mstrname + ",");
    JLabel lbl12 = new JLabel(" for buying " + mstritem + " of the cost " +
                              mstrcost + " . " + mstritem +
                              " will be delivered " + mstrday);
    cmd4 = new JButton("OK");
    cmd4.addActionListener(this);
    getContentPane().add(lbl11);
    getContentPane().add(lbl12);
    getContentPane().add(cmd4);
    this.setVisible(true);
  }

  public void actionPerformed(ActionEvent e) {
    System.exit(0);
  }
}