java - 多重预订系统

Question

我目前正在开发一个预订系统，作为我学位的任务。我需要为每个放映时间“保存/存储”座位计划(单选按钮)，以便例如如果我预订了 13:00 的 2 张门票，我还可以预订 15:00 同一地点的 2 张门票。最好的方法是什么？

PS:我没有使用数据库，我也不想使用；由于任务要求。

这是我的代码，如果可以的话请运行它。

// CM1203 Fundamentals of Computing with Java; Second Assignement.
// Walter Carvalho - C1001984; 2012.
// Cardiff University

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

public class cinemaSystem extends JFrame implements ActionListener {
    // Global Variables
    boolean lselected, rselected, mselected;
    double chargeDue;
    int a, b, c;
    static Ticket oapticket, childticket, adultticket;
    JFrame frame = new JFrame(); // Creates JFrame
    JLabel title, lchild, ladult, loap, ltotalprice, time;
    JTextField child, adult, oap, totalprice;
    JButton submit;
    JRadioButton time1, time2, time3, time4, time5; // Radio Butons
    JToggleButton l[][], m[][], r[][]; // Names grid of JButtons
    JPanel panel1, panel2, panel3, panel4, panel5, panel6;
    ArrayList<String> seatsAvailable = new ArrayList<String>();
    ArrayList<String> coupon = new ArrayList<String>();

    // Constructor
    public cinemaSystem(){

            title = new JLabel("Cinema Booking System");
            title.setFont(new Font("Helvetica", Font.BOLD, 30));
            title.setLocation(12,5);
            title.setSize(600, 60);

            frame.setLayout(null); // Setting Grid Layout
            // panel1.setLayout(new GridLayout(seat,row));
            l = new JToggleButton[4][4]; // Allocating Size of Grid
            panel1 = new JPanel(new GridLayout(4,4));
            panel1.setBounds(20, 95, 220, 140);
            for(int y = 0; y <4 ; y++){
                    for(int x = 0; x < 4; x++){
                        l[x][y] = new JToggleButton("L" + y + x); // Creates New JButton
                        l[x][y].addActionListener(this);
                        seatsAvailable.add("L" + y + x);
                        panel1.add(l[x][y]); //adds button to grid
                    }
            }

            m = new JToggleButton[4][2]; // Allocating Size of Grid
            panel2 = new JPanel(new GridLayout(2,4));
            panel2.setBounds(240, 165, 220, 70);
            for(int y = 0; y <2 ; y++){
                    for(int x = 0; x < 4; x++){
                        m[x][y] = new JToggleButton("M" + y + x); // Creates New JButton
                        m[x][y].addActionListener(this);
                        seatsAvailable.add("M" + y + x);
                        panel2.add(m[x][y]); //adds button to grid
                    }
            }

            r = new JToggleButton[4][4]; // Allocating Size of Grid
            panel3 = new JPanel(new GridLayout(4,4));
            panel3.setBounds(460, 95, 220, 140);
            for(int y = 0; y <4 ; y++){
                    for(int x = 0; x < 4; x++){
                        r[x][y] = new JToggleButton("R" + y + x); // Creates New JButton
                        r[x][y].addActionListener(this);
                        seatsAvailable.add("R" + y + x);
                        panel3.add(r[x][y]); //adds button to grid
                    }
            }

            panel4 = new JPanel(new FlowLayout());
            panel4.setBounds(0, 250, 300, 70);

            lchild = new JLabel("Child");
            child = new JTextField("0", 2);
            child.addActionListener(this);

            ladult = new JLabel("Adult");
            adult = new JTextField("0", 2);
            adult.addActionListener(this);

            loap = new JLabel("OAP");
            oap = new JTextField("0", 2);
            oap.addActionListener(this);

            submit = new JButton("Submit");
            submit.addActionListener(this);

            oapticket = new Ticket(4.70);
            childticket = new Ticket(3.50);
            adultticket = new Ticket(6.10);     

            child.addKeyListener(new MyKeyAdapter());
            oap.addKeyListener(new MyKeyAdapter());
            adult.addKeyListener(new MyKeyAdapter());

            panel4.add(lchild);
            panel4.add(child);
            panel4.add(ladult);
            panel4.add(adult);
            panel4.add(loap);
            panel4.add(oap);
            panel4.add(submit);

            panel5 = new JPanel(new FlowLayout());
            panel5.setBounds(240, 250, 300, 70);

            ltotalprice = new JLabel("Charge Due (£): ");
            totalprice = new JTextField("£0.00", 5);
            totalprice.setEnabled(false);
            panel5.add(ltotalprice);
            panel5.add(totalprice);

            panel6 = new JPanel(new FlowLayout());
            panel6.setBounds(0, 55, 560, 30);

            time = new JLabel("Please select a film time: ");
            time1 = new JRadioButton("13:00", true);
            time2 = new JRadioButton("15:00", false);
            time3 = new JRadioButton("17:00", false);
            time4 = new JRadioButton("19:00", false);
            time5 = new JRadioButton("21:00", false);

            ButtonGroup group = new ButtonGroup();
            group.add(time1);
            group.add(time2);
            group.add(time3);
            group.add(time4);
            group.add(time5);
            panel6.add(time);
            panel6.add(time1);
            panel6.add(time2);
            panel6.add(time3);
            panel6.add(time4);
            panel6.add(time5);
            time1.addActionListener(this);
            time2.addActionListener(this);
            time3.addActionListener(this);
            time4.addActionListener(this);
            time5.addActionListener(this);
            frame.add(title);
            frame.add(panel1);
            frame.add(panel2);
            frame.add(panel3);
            frame.add(panel4);
            frame.add(panel5);
            frame.add(panel6);
            frame.setPreferredSize(new Dimension(700, 350));
            frame.setTitle("Cinema Booking");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.pack(); //sets appropriate size for frame
            frame.setVisible(true); //makes frame visible


    }

    // Calculates Charge Due for current transaction.
    public double calcChargeDue(){
        DecimalFormat df = new DecimalFormat("#.##");
        double chargeDue = 0.0;
        chargeDue = (a*childticket.price) + (b*oapticket.price) + (c*adultticket.price);
        totalprice.setText("£"+df.format(chargeDue));
        return chargeDue;
    }

    // Method to check if the number of people matches the number of seats selected.
    public void check(){
        int check = coupon.size();
        int noTickets = a + b + c;
        if (check != noTickets){
            submit.setEnabled(false);
        }
        else {
            submit.setEnabled(true);
        }

    }

    // Ticket Object
    public class Ticket {

        double price;

        // Constructor
        public Ticket(double cost) {
            price = cost;
        }

        public double getTicketPrice() {
            return price;
        }

    }

    public void actionPerformed(ActionEvent e)
    {

        a = Integer.parseInt(child.getText());
        b = Integer.parseInt(oap.getText());
        c = Integer.parseInt(adult.getText());

        for(int y = 0; y < 4; y++){
            for(int x = 0; x < 4; x++){

                lselected = l[x][y].isSelected();
                rselected = r[x][y].isSelected();

                if (e.getSource() == l[x][y]) {
                    if(lselected == true){
                        coupon.add(e.getActionCommand());
                        calcChargeDue();
                        check();
                    }
                    else {
                        coupon.remove(e.getActionCommand());
                        check();
                    }
                }

                if (e.getSource() == r[x][y]) {
                    if(rselected == true){
                        coupon.add(e.getActionCommand());
                        calcChargeDue();
                        check();
                    }
                    else {
                        coupon.remove(e.getActionCommand());
                        check();
                    }
                }

                if (e.getSource() == oap){
                    calcChargeDue();
                    check();
                }

                if (e.getSource() == adult){
                    calcChargeDue();
                    check();
                }

                if (e.getSource() == child){
                    calcChargeDue();
                    check();
                }

            }
        }

        for(int y = 0; y < 2; y++){
            for(int x = 0; x < 4; x++){

                mselected = m[x][y].isSelected();

                if (e.getSource() == m[x][y]) {
                    if(mselected == true){
                        coupon.add(e.getActionCommand());
                        calcChargeDue();
                        check();
                    }
                    else {
                        coupon.remove(e.getActionCommand());
                        check();
                    }
                }
            }
        }

        if(time1 == e.getSource()){

        }

        if(time2 == e.getSource()){

        }

        if(time3 == e.getSource()){

        }

        if(time4 == e.getSource()){

        }

        if(time5 == e.getSource()){

        }

        if(submit == e.getSource()) {

            for(int y = 0; y < 4; y++){
                for(int x = 0; x < 4; x++){

                    lselected = l[x][y].isSelected();
                    rselected = r[x][y].isSelected();

                    if (lselected == true) {
                            l[x][y].setEnabled(false);
                    }

                    if (rselected == true) {
                            r[x][y].setEnabled(false);
                    }

                }
            }

            for(int y = 0; y < 2; y++){
                for(int x = 0; x < 4; x++){

                    mselected = m[x][y].isSelected();

                    if (mselected == true) {
                            m[x][y].setEnabled(false);
                    }
                }
            }

            Collections.sort(coupon);
            System.out.println("Here's your ticket:");
            System.out.println(coupon);
            System.out.println("Child: " + child.getText());
            System.out.println("Adult: " + adult.getText());
            System.out.println("OAP: " + oap.getText());
            System.out.println("Total Price: " + totalprice.getText());
            System.out.println("Thank you. Enjoy your film.");
            System.out.println(" ");
            coupon.clear();
            child.setText("0");
            adult.setText("0");
            oap.setText("0");
        }

    }

    // Main Class
    public static void main(String[] args) {
            new cinemaSystem(); //makes new ButtonGrid with 2 parameters
    }
}

相关:Java: Disable all JToggleButtons after Submission — setEnabled(false);

Answer 1

如果您已经让它在一个预订时间工作，您所需要做的就是将用于存储有关该预订时间的信息的所有数据结构加倍，以支持多个独立的预订时间。

例如，ArrayList<String> seatsAvailable = new ArrayList<String>();将变成:

Dictionary<Time, ArrayList<String> > seatsAvailable = 
    new Dictionary<Time,  ArrayList<String> >();

Time firstBooking = new Time(13,0,0);
Time secondBooking = new Time(15,0,0);

seatsAvailable.put( firstBooking , new ArrayList<String>() );
seatsAvailable.put( secondBooking , new ArrayList<String>() );

现在您可以跟踪两个完全独立的可用座位数组列表。