java - 如何让这个文本区域显示选择了哪些切换按钮？

Question

请有人帮我，我正在尝试为我的电影票系统分配座位预订部分......所以问题是我希望按钮的文本在被选中时显示在文本区域中而不是显示只有取消选择时的特定文本..但是当我取消选择一个按钮时，整个文本区域被清除。

例如当我选择 C1、C2、C3 时 - 它在文本区域中正确显示，但如果我想取消选择 C3，文本区域现在必须仅显示 C1 和 C2。相反，它会清除整个文本区域!

谁能看出逻辑上的问题？

  import java.awt.*;
  import static java.awt.Color.blue;
  import javax.swing.*;
  import java.awt.event.*;
  import javax.swing.border.Border;


  public class Cw_Test2  extends JFrame {

JButton btn_payment,btn_reset;
JButton buttons;
JTextField t1,t2; 



public static void main(String[] args) {
    // TODO code application logic here
   new  Cw_Test2();
}

public Cw_Test2()
{
    Frame(); 

}

  public void Frame()
{
    this.setSize(1200,700);     //width, height
    this.setTitle("Seat Booking");
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.setLocationRelativeTo(null);

    Font myFont = new Font("Serif", Font.ITALIC | Font.BOLD, 6);
    Font newFont = myFont.deriveFont(20F);

    t1=new JTextField();  
    t1.setBounds(15, 240, 240,30); 

    JPanel thePanel = new JPanel()
     {
        @Override
         public Dimension getPreferredSize() {
         return new Dimension(350, 350);
        };
    };    
    thePanel.setLayout(null);

    JPanel ourPanel = new JPanel()        
    {
        @Override
         public Dimension getPreferredSize() {
         return new Dimension(350, 350);
        };
    };
    //ourPanel.setBackground(Color.green);
    Border ourBorder = BorderFactory.createLineBorder(blue , 2);
    ourPanel.setBorder(ourBorder);
    ourPanel.setLayout(null);
    ourPanel.setBounds(50,90, 1100,420); 

    JPanel newPanel = new JPanel()        
    {
        @Override
         public Dimension getPreferredSize() {
         return new Dimension(350, 350);
        };
    };
    //ourPanel.setBackground(Color.green);
    Border newBorder = BorderFactory.createLineBorder(blue , 1);
    newPanel.setBorder(newBorder);
    newPanel.setLayout(null);
    newPanel.setBounds(790,50, 270,340); 

    JLabel label1 = new JLabel( new ColorIcon(Color.GRAY, 400, 100) );
    label1.setText( "SCREEN" );
    label1.setHorizontalTextPosition(JLabel.CENTER);
    label1.setVerticalTextPosition(JLabel.CENTER);
    label1.setBounds(130,50, 400,30);

    JLabel label2 = new JLabel(" CINEMA TICKET MACHINE ");
    label2.setBounds(250,50,400,30);
    label2.setFont(newFont);
    JLabel label3 = new JLabel("Please Select Your Seat");
    label3.setBounds(270,10,500,30);
    label3.setFont(newFont);
    JLabel label4 = new JLabel("Selected Seats:");
    label4.setBounds(20,10,200,30);
    label4.setFont(newFont);


    btn_payment=new JButton("PROCEED TO PAY");  
    btn_payment.setBounds(35,290,200,30);

    JLabel label6 = new JLabel("Center Stall");
   label6.setBounds(285,172,200,30);

     JPanel seatPane, seatPane1, seatPane2, seatPane3, seatPane4, seatPane5;
      JToggleButton[] seat2 = new JToggleButton[8];

    JTextArea chosen = new JTextArea();
 chosen.setEditable(false);
 chosen.setLineWrap(true);
 chosen.setBounds(20, 60, 200, 100); 

  // Center Seats
 seatPane1 = new JPanel();
 seatPane1.setBounds(200,200,250,65);
 seatPane1.setLayout(new FlowLayout());

 for(int x=0; x<8; x++){


     seat2[x] = new JToggleButton("C"+(x+1));


     seatPane1.add(seat2[x]);


    seat2[x].addActionListener(new ActionListener(){

        public void actionPerformed(ActionEvent ev){

            AbstractButton abstractButton = (AbstractButton) ev.getSource();
            boolean selected = abstractButton.getModel().isSelected();

            for(int x=0; x<8; x++){


            if(seat2[x]==ev.getSource()){
                if(selected){


                    chosen.append(seat2[x].getText()+",");


                }else{
                    chosen.setText(seat2[x].getText().replace(seat2[x].getText(),""));





                }



            }

            }

        }

    }); 
 }

 newPanel.add(chosen);
 ourPanel.add(seatPane1);
 ourPanel.add(label6);
 thePanel.add(label2);
    ourPanel.add(label3);
    ourPanel.add(label1);
    newPanel.add(btn_payment);
    newPanel.add(label4);

    ourPanel.add(newPanel);
    thePanel.add(ourPanel);
    add(thePanel);
    setResizable(false);
    this.setVisible(true);

}


  public static class ColorIcon implements Icon
{
    private Color color;
    private int width;
    private int height;

    public ColorIcon(Color color, int width, int height)
    {
        this.color = color;
        this.width = width;
        this.height = height;
    }

    public int getIconWidth()
    {
        return width;
    }

    public int getIconHeight()
    {
        return height;
    }

    public void paintIcon(Component c, Graphics g, int x, int y)
    {
        g.setColor(color);
        g.fillRect(x, y, width, height);
    }
}

Answer 1

When any seat is selected or deselected, this code iterates an array of seats (in the method showSelectedSeats()) and updates the text area to show the seats that are selected.

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

public class CinemaTicketMachine {

    private JComponent ui = null;
    private JToggleButton[] seats = new JToggleButton[80];
    private JTextArea selectedSeats = new JTextArea(3, 40);

    CinemaTicketMachine() {
        initUI();
    }

    public void initUI() {
        if (ui!=null) return;

        ui = new JPanel(new BorderLayout(4,4));
        ui.setBorder(new EmptyBorder(4,4,4,4));

        selectedSeats.setLineWrap(true);
        selectedSeats.setWrapStyleWord(true);
        selectedSeats.setEditable(false);
        ui.add(new JScrollPane(selectedSeats), BorderLayout.PAGE_END);

        JPanel cinemaFloor = new JPanel(new BorderLayout(40, 0));
        cinemaFloor.setBorder(new TitledBorder("Available Seats"));
        ui.add(cinemaFloor, BorderLayout.CENTER);
        JPanel leftStall = new JPanel(new GridLayout(0, 2, 2, 2));
        JPanel centerStall = new JPanel(new GridLayout(0, 4, 2, 2));
        JPanel rightStall = new JPanel(new GridLayout(0, 2, 2, 2));

        cinemaFloor.add(leftStall, BorderLayout.WEST);
        cinemaFloor.add(centerStall, BorderLayout.CENTER);
        cinemaFloor.add(rightStall, BorderLayout.EAST);

        ActionListener seatSelectionListener = new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                showSelectedSeats();
            }
        };

        for (int ii=0; ii <seats.length; ii++) {
            JToggleButton tb = new JToggleButton("S-" + (ii+1));
            tb.addActionListener(seatSelectionListener);
            seats[ii] = tb;
            int colIndex = ii%8;
            if (colIndex<2) {
                leftStall.add(tb);
            } else if (colIndex<6) {
                centerStall.add(tb);
            } else {
                rightStall.add(tb);
            }
        }
    }

    private void showSelectedSeats() {
        StringBuilder sb = new StringBuilder();
        for (int ii=0; ii<seats.length; ii++) {
            JToggleButton tb = seats[ii];
            if (tb.isSelected()) {
                sb.append(tb.getText());
                sb.append(", ");
            }
        }
        String s = sb.toString();
        if (s.length()>0) {
            s = s.substring(0, s.length()-2);
        }
        selectedSeats.setText(s);
    }

    public JComponent getUI() {
        return ui;
    }

    public static void main(String[] args) {
        Runnable r = new Runnable() {
            @Override
            public void run() {
                CinemaTicketMachine o = new CinemaTicketMachine();

                JFrame f = new JFrame(o.getClass().getSimpleName());
                f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                f.setLocationByPlatform(true);

                f.setContentPane(o.getUI());
                f.pack();
                f.setMinimumSize(f.getSize());

                f.setVisible(true);
            }
        };
        SwingUtilities.invokeLater(r);
    }
}