我有一个项目，它有一个我应该用三个类制作的界面：Flight，Ticket和Seat。当用户点击座位时，该按钮将以蓝色突出显示，并且＆＃34; Seat＆＃34;文本字段填充了座位号。一旦用户点击＆＃34;选择座位＆＃34;按钮，该按钮以红色突出显示，并弹出消息询问用户是否要确认该过程。
PS：有100个座位，这意味着有100个按钮。行标记的数字最多为20，行标记为A，B，C，D和E.
我的问题是：
我尝试使用循环来增加按钮和标签的数量，但它没有用。单击按钮或单击其他按钮后，如何更改按钮的颜色？
如何链接＆＃34;座位＆＃34;带座位按钮的文本字段是否显示座位号？
编辑：更改我的代码并尝试使用不同的代码后，我仍然很难改变座位按钮的颜色。 这是我的代码。
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.* ;
import java.io.* ;
class project extends JFrame implements ActionListener
{
Flight flight = new Flight("Emirates", 817 , "RUH-DXB" , 1.45 , 18.3 ) ;
Seat tempSeat , seat ;
JButton tempButton ;
int ticketNO = 1 ;
String TicketNo ; // to keep like "TK00001"
boolean issu = false ;
String resultTicket = "" ;
private JLabel label1 ;
private JLabel label2 ;
private JLabel label3 ;
private JLabel label4 ;
private JLabel label5 ;
private JLabel label6 ;
private JLabel label7 ;
private JLabel label8 ;
private JLabel label9 ;
private JButton chooseButton;
private JButton IssueButton;
private JTextField inputLine1;
private JTextField inputLine2;
private JTextField inputLine3;
private JTextField inputLine4;
private JTextField inputLine5;
private JTextField inputLine6;
private JTextField inputLine7;
private JTextField inputLine8;
private JTextArea textArea ;
// 2D array
JButton[][] LButton = new JButton[20][5];
// inner class to invoke the close window event
class EventHandler extends WindowAdapter
{
public void windowClosing(WindowEvent evt) {
int answer = JOptionPane.showConfirmDialog(null , "Are you sure that you want to Exit ?"
,"Exit", JOptionPane.YES_NO_OPTION);
if( answer == JOptionPane.YES_OPTION)
{
Date date = new Date() ;
try
{
File outFile = new File("Log.txt") ;
FileOutputStream sf = new FileOutputStream(outFile) ;
PrintWriter pf = new PrintWriter(sf) ;
pf.println("=================" ) ;
pf.println("Today's Log - + " + date.toString()+"\n" );
pf.println("Issued Tickets: ");
for(int i = 0 ; i< resultTicket.length() ; i++)
{
if( resultTicket.charAt(i) != '\n' )
pf.print(resultTicket.charAt(i)); // same text in textArea
else
pf.println();
}
pf.println("The airlines of the flight: " + flight.getairLines() );
pf.println("Flight number: " + flight.getflightNo());
pf.println("Route: "+ flight.getroute() );
pf.println("Departure Time: " + flight.getDepartureTime());
pf.println("Dutation: " + flight.getduration());
for(int r = 0 ; r < 20 ; r++)
{
for(int c = 0 ; c < 5 ; c++)
{
pf.print( flight.list[r][c].getSeatNo() + " : " );
pf.println( flight.list[r][c].isAvailable() ? "Available" : "Unavailable");
}
}
JOptionPane.showMessageDialog(null , "The information is/are saved");
pf.close() ;
System.exit(0) ;
} // end try
catch(IOException e )
{
JOptionPane.showMessageDialog(null , "Error, file couldn't be opened");
System.exit(0) ;
}
} // end if answer
}
}// end inner class
//---------------------------------------
public static void main(String[] args)
{
project frame = new project();
frame.setVisible(true);
}
public project() {
addWindowListener(new EventHandler());
Container contentPane = getContentPane( );
setSize (900, 700);
setResizable (false);
setTitle ("Seat Selector ");
setLocation (200, 10);
contentPane.setLayout(null);
label1 = new JLabel("AirLines:" ) ;
label1. setBounds(10 , 30 , 100 , 30 ) ;
contentPane.add(label1 );
inputLine1 = new JTextField(flight.getairLines());
inputLine1.setColumns(10);
inputLine1. setBounds(80 , 30 , 150 , 30 ) ;
inputLine1.setEnabled(false);
contentPane.add(inputLine1 );
label2 = new JLabel("FlightNumber:" ) ;
label2. setBounds(250 , 30 , 100 , 30 ) ;
contentPane.add(label2 );
inputLine2 = new JTextField("" + flight.getflightNo());
inputLine2.setColumns(10);
inputLine2. setBounds(340 , 30 , 150 , 30 ) ;
inputLine2.setEnabled(false);
contentPane.add(inputLine2 );
//=================================
label3 = new JLabel("Rout:" ) ;
label3. setBounds(10 , 60 , 100 , 30 ) ;
contentPane.add(label3 );
inputLine3 = new JTextField(flight.getroute());
inputLine3.setColumns(10);
inputLine3. setBounds(80 , 60 , 150 , 30 ) ;
inputLine3.setEnabled(false);
contentPane.add(inputLine3 );
label4 = new JLabel("Duration:" ) ;
label4. setBounds(250 , 60 , 100 , 30 ) ;
contentPane.add(label4 );
inputLine4 = new JTextField(""+flight.getduration());
inputLine4.setColumns(10);
inputLine4. setBounds(340 , 60 , 150 , 30 ) ;
inputLine4.setEnabled(false);
contentPane.add(inputLine4 );
//=======================================
label5 = new JLabel("TicketNubmer:" ) ;
label5. setBounds(10 , 120 , 100 , 30 ) ;
contentPane.add(label5 );
inputLine5 = new JTextField("TK0000" + ticketNO);
inputLine5.setColumns(10);
inputLine5. setBounds(10 , 150 , 150 , 30 ) ;
inputLine1.setEnabled(false);
contentPane.add(inputLine5 );
label6 = new JLabel("Departure Time:" ) ;
label6. setBounds(250 , 90 , 100 , 30 ) ;
contentPane.add(label6 );
inputLine6 = new JTextField("" + flight.getDepartureTime());
inputLine6.setColumns(10);
inputLine6. setBounds(340 , 90 , 150 , 30 ) ;
inputLine6.setEnabled(false);
contentPane.add(inputLine6 );
//=======================================
label7 = new JLabel("Pasenger:" ) ;
label7. setBounds(10 , 190 , 100 , 30 ) ;
contentPane.add(label7 );
inputLine7 = new JTextField("Passenger Name");
inputLine7.setColumns(10);
inputLine7. setBounds(80 , 190 , 150 , 30 ) ;
contentPane.add(inputLine7 );
chooseButton= new JButton("Choose Seat");
chooseButton. setBounds(250 , 190 , 150 , 30 ) ;
contentPane.add(chooseButton) ;
chooseButton.addActionListener(this);
//====================================
label8 = new JLabel("Seat:" ) ;
label8. setBounds(10 , 230 , 100 , 30 ) ;
contentPane.add(label8 );
inputLine8 = new JTextField();
inputLine8.setColumns(10);
inputLine8. setBounds(80 , 230 , 70 , 30 ) ;
inputLine8.setEnabled(false);
contentPane.add(inputLine8 );
IssueButton= new JButton("Issue Ticket");
IssueButton. setBounds(250 , 230 , 150 , 30 ) ;
contentPane.add(IssueButton) ;
IssueButton.addActionListener(this);
label9 = new JLabel("Today's Log:" ) ;
label9. setBounds(30 , 370 , 150 , 30 ) ;
contentPane.add(label9 );
textArea = new JTextArea();
textArea.setColumns(15);
textArea.setRows(8);
textArea.setBorder(BorderFactory.createLineBorder(Color.red));
textArea.setEditable(false);
textArea. setBounds(30 , 400 , 400 , 200 ) ;
contentPane.add(textArea);
//==========================
JLabel chr[] = new JLabel[5];
char ch = 'A' ;
int x = 600 ;
int y = 20 ;
for(int i = 0 ; i < 5 ; i++)
{
chr[i] = new JLabel(""+ch++) ;
chr[i].setBounds(x , y , 20 , 20 ) ;
contentPane.add(chr[i] );
x += 20 ;
}
//=============================
JLabel No[] = new JLabel[20];
x = 580 ;
y = 40 ;
for(int i = 0 ; i < 20 ; i++)
{
No[i] = new JLabel(""+(i+1)) ;
No[i].setBounds(x , y , 20 , 20 ) ;
contentPane.add(No[i] );
y += 20 ;
}
//========================
x = 600 ;
y = 20 ;
for(int i = 0 ; i < 20 ; i++)
{
y = y + 20 ;
x = 600 ;
for(int j = 0 ; j<5; j++)
{
LButton[i][j] = new JButton();
LButton[i][j]. setBounds(x , y , 20 , 20 ) ;
contentPane.add( LButton[i][j]) ;
LButton[i][j].setBackground(Color.GREEN) ;
LButton[i][j].addActionListener(this);
x = x+20 ;
}
}
disAbleSeat() ; // call method to make all seat color unEnable
setDefaultCloseOperation( EXIT_ON_CLOSE );
//////////***************************************
// load file
/*
Seat list[]= null ;
try
{
File f = new File("reservedSeat.dat") ;
FileInputStream r = new FileInputStream(f) ;
ObjectInputStream file = new ObjectInputStream (r) ;
list = (Seat[]) file.readObject() ;
file.close() ;
}
catch(ClassNotFoundException e)
{
System.out.println("Error, class not found");
System.exit(0) ;
}
catch(IOException e)
{
System.out.println("Error, file couldn't be opened ");
System.exit(0) ;
}
for(int k = 0 ; k < list.length ; k++)
{
for(int i = 0 ; i < 20 ; i++)
for(int j = 0 ; j< 5 ; j++)
{
Seat s = flight.getSeat(i,j) ;
if( list[i].getSeatNo().equals( s.getSeatNo()))
{
s.setAvailable(false);
LButton[i][j].setBackground(Color.RED) ;
}
}
}
/////////////////////////////////////////*****
*/
}// end constructor
public void actionPerformed(ActionEvent event) {
JButton press = (JButton) event.getSource() ;
String str = press.getText() ;
if(str.equals("Choose Seat") )
{
chooseButton.setText("Confirm");
enableSeat() ;
TicketNo = "TK" + ( ticketNO < 9 ? "0000" : "000") + ticketNO ;
inputLine5.setText(TicketNo) ;
return ;
}
else
if(str.equals("Confirm"))
{
if( tempSeat == null && tempButton == null )
{
JOptionPane.showMessageDialog(this , "first select seat.");
return ;
}
else
if( issu == true )
{
JOptionPane.showMessageDialog(this , "you are already confirm issue seat");
return ;
}
else
{
tempSeat.setAvailable(false) ;
tempButton.setBackground(Color.RED);
issu = true ;
disAbleSeat() ;
return ;
}
} // end confirm
if(str.equals("Issue Ticket"))
{
if( issu == false )
{
JOptionPane.showMessageDialog(this , "you can not creat a Ticket without confirming a seat ");
return ;
}
else
{
int answer = JOptionPane.showConfirmDialog(null , "are you sure you want to issue the thicket?"
,"confirming", JOptionPane.YES_NO_OPTION);
if( answer == JOptionPane.YES_OPTION)
{
Ticket tick = new Ticket(inputLine7.getText() ,
TicketNo , flight , tempSeat ) ;
ticketNO++ ;
tick.issueTicket() ;
chooseButton.setText("Choose Seat");
resultTicket += tick.getticketNo() +"-"+ tick.getpassenger()+"-"+tempSeat.getSeatNo() +"\n" ;
textArea.append (tick.getticketNo() +"-"+ tick.getpassenger()+"-"+tempSeat.getSeatNo() +"\n" );
tempSeat = null ;
tempButton = null ;
}// press yes
else
if( answer == JOptionPane.NO_OPTION) // cancel seat and return seat to grean color
{
chooseButton.setText("Choose Seat");
tempButton.setBackground(Color.GREEN);
tempSeat.setAvailable(true) ;
disAbleSeat() ;
tempSeat = null ;
tempButton = null ;
}// press no
} // end if issu
issu = false ;
}// end button issue
//====================================================
else // if press seat buttons
{
if( tempSeat != null && tempButton != null )
{
tempButton.setBackground(Color.GREEN);
tempSeat = null ;
tempButton = null ;
}
for(int i = 0 ; i < 20 ; i++)
{
for(int j = 0 ; j<5; j++)
{
if(press == LButton[i][j] )
{
seat = flight.getSeat(i,j) ;
if(seat.isAvailable() == false )
return ;
tempSeat = seat ;
tempButton = press ;
press.setBackground(Color.BLUE);
inputLine8.setText(seat.getSeatNo());
return ;
}
} // end for j
}// end for i
}// end press seat buttons
}// end Action
public void enableSeat() // all avalable
{
for(int i = 0 ; i < 20 ; i++)
for(int j = 0 ; j<5; j++)
LButton[i][j].setEnabled(true) ;
}
public void disAbleSeat() //
{
for(int i = 0 ; i < 20 ; i++)
for(int j = 0 ; j<5; j++)
LButton[i][j].setEnabled(false) ;
}
}// end class
答案 0 :(得分：0)
您可以使用MouseListener处理JButtons上的点击事件。然后，在侦听器内部，使用this访问该按钮，并更改其值。从中，您可以访问其他对象，假设您在类中开发了这些关系。
另一种方法是使用单例模式加载所有组件，然后在需要时在监听器中调用它们。因此，必须可以从事件处理程序方法访问它们。
嗯，对于你的问题的其余部分，这是一般的应用程序设计，所以回答非常复杂，因为不同的人可能会做不同的事情（一些好的设计，一些差的设计，取决于上下文中）
答案 1 :(得分：0)
也许这会帮助你作为一个起点
import java.awt.Color;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
public class ListButtonPanel extends JPanel implements ActionListener {
private List<JButton> buttons = new ArrayList<>();
public ListButtonPanel() {
this.setPreferredSize(new Dimension(1024, 768));
for(int i = 1; i <= 100; i++) {
buttons.add(new JButton("Seat-" + i));
}
this.setLayout(new GridLayout(10, 10));
for(JButton button : buttons) {
button.addActionListener(this);
this.add(button);
}
}
@Override
public void actionPerformed(ActionEvent e) {
JButton sourceBtn = (JButton) e.getSource();
int showConfirmDialog = JOptionPane.showConfirmDialog(getParent(), "You want to reserve seat " + sourceBtn.getText() + "", "Reserve Seat", JOptionPane.YES_NO_CANCEL_OPTION);
if(showConfirmDialog == 0) {
sourceBtn.setBorder(BorderFactory.createLineBorder(Color.RED, 3, true));
sourceBtn.setEnabled(false);
sourceBtn.setForeground(Color.red);
}
}
}
答案 2 :(得分：0)
这里有两个java类，展示了你需要的基本概念：
第一个展示了如何在for循环中创建按钮并为click事件添加ActionListener。
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
public class Frame extends JFrame {
public Frame() {
setSize(600, 400);
setDefaultCloseOperation(EXIT_ON_CLOSE);
getContentPane().setLayout(new GridLayout(2,2));
JTextField field = new JTextField();
// batch create buttons
JButton btn;
for (int i = 0; i < 10; i++) {
String name = new Integer(i+1).toString();
btn = new JButton(name);
// add an action command to identify the buttons
btn.setActionCommand(name);
// add an instance of Action to handle the click event
btn.addActionListener(new Action(field));
// add button to the frame
add(btn);
}
// add the field to the frame
add(field);
pack();
setVisible(true);
}
}
第二个实现ActionEvent并显示如何操作文本字段并为单击的按钮着色。
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JTextField;
public class Action implements ActionListener {
public JTextField field;
public Action(JTextField theField) {
field = theField;
}
public void actionPerformed(ActionEvent e) {
// set the textfield's text
field.setText(e.getActionCommand());
// set clicked button color
JButton theButton = (JButton)e.getSource();
theButton.setBackground(new Color(255, 0, 0));
}
}