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在Java中

2014-05-09 44 views
-1

与交互的JButton我有我应该做有三个类的接口一个项目：飞行，机票和座位。当用户点击座位时，按钮将以蓝色突出显示，并且“座位”文本字段将填充座位号。一旦用户点击“选择座位”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。在Java中

PS：有100个座位，这意味着有100层的按钮。行被标记以数字多达20和行被标记为A，B，C，d和E

我的问题是：

  1. 我试图for循环乘以按钮的数目和标签，但它没有工作。我点击按钮或点击另一个按钮时，如何更改按钮的颜色？

  2. 我怎样才能在显示的座位号的方式与座椅按钮链接的“座位”的文本字段？

编辑︰改变我的代码，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

来源

2014-05-09 Boshokai

回答

0

您可以使用MouseListener处理JButton上的单击事件。然后，在监听器里，用this访问按钮，并改变其值。从它，你可以访问其他对象，假设你在类中开发了这些关系。

另一种方法是使用Singleton模式加载所有组件，然后打电话给他们在你的听众，当你需要他们。因此，它们必须可以从事件处理程序方法访问。

那么，对于你的问题的其余部分，这是一般的应用设计，所以这是相当复杂的回答，因为不同的人可以做不同的事情（一些很好的设计，一些贫穷的人，根据上下文）

来源

2014-05-09 22:12:31

0

也许这将帮助你为起点

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); 
     } 
    } 
}

来源

2014-05-09 22:34:45 Patrick

0

这里有两个Java类展示你所需要的基本概念：

第一个演示如何在创建按钮for循环，并添加一个ActionListener的点击事件。

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点击的按钮着色。

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)); 
    } 

}

来源

2014-05-09 22:59:08 321hendrik

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