这是两个Java bean应用的例子

 
 
 
概述：这是两个Java bean应用的例子，实现航空预定机票的功能。

预定构件功能说明：

1，预定构件应包含二个面板，预定座位面板与乘客面板

2，在装入预定构件时不应有可用的乘客面板

3，当用户打入要预定的旅行地点.旅行日期及座位号时：

    (1)首先，应按以下格式生成乘客号：<place of  travel> <date of travel> <count of the seat number>

    (2)其次，在显示乘客号时应使乘客面板是可见的（注意：你可能重定BeanBox窗口中bean大小，以观看此乘客面板。而且，如果打入座位号为0，则不应显示乘客面板。）

    (3)当用户点击乘客面板的submit按钮时，此面板的所有域控件中文本应置为空    

    (4)上面步骤被重复，直到所接收的乘客材料个数等于预定的座位数为止

4，在已预定了所需座位号之后，给出所预定座位号的消息框应被显示d

5,乘客面板应作为bean创建，可以把嵌入在铁路预定应用或航空应用中

6，你需接受以下格式之一的旅行日期"dd/mm/yy","mm/dd/yy","dd-Month-yy"

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/*1* Program file:   PsEvent.java* Creat time:   08/01/2004* Creat by:          InberKong* Last Modify time:* Modify by:       * Function describe: Event Class*/import java.util.*;public class PsEvent extends EventObject{ // public String number; public String name; public String address; public String phone;  public PsEvent(Object source,String m1,String m2,String m3,String m4) {  super(source);  this.number=m1;  this.name=m2;  this.address=m3;  this.phone=m4; }}

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/*2* Program file:   PsEventListener.java* Creat time:   08/01/2004* Creat by:          InberKong* Last Modify time:* Modify by:       * Function describe: Event listener*/

import java.util.*;public interface PsEventListener extends EventListener{ public void psPerformed(PsEvent ev);}---------------------------

/*3* Program file:   PsBean.java* Creat time:   08/01/2004* Creat by:          InberKong* Last Modify time:* Modify by:       * Function describe: Passenger message bean*/import javax.swing.*;import java.awt.*;import java.awt.event.*;public class PsBean extends JPanel implements ActionListener{ JLabel lb_number; JLabel lb_name; JLabel lb_address; JLabel lb_phone; JTextField tf_number; JTextField tf_name; JTextField tf_address; JTextField tf_phone; JButton sbmt; PsEventListener pl;//声明事件监听    public PsBean() {  setLayout(new GridLayout(5,2));//设置布局管理器

  lb_number=new JLabel("Passenger Number:");//创建对象  lb_name=new JLabel("Passenger Name:");  lb_address=new JLabel("Passenger Address:");  lb_phone=new JLabel("Passenger Phone:");    tf_number=new JTextField(15);  tf_name=new JTextField(15);  tf_address=new JTextField(25);  tf_phone=new JTextField(15);

  sbmt=new JButton("Submit");      add(lb_number);  add(tf_number);  add(lb_name);  add(tf_name);  add(lb_address);  add(tf_address);  add(lb_phone);  add(tf_phone);  add(sbmt);  sbmt.addActionListener(this);//监听事件  tf_number.setEnabled(false);   }   public void actionPerformed(ActionEvent evt) {  Object obj=evt.getSource();  if(obj==sbmt)  {   PsEvent ev=new PsEvent(obj,tf_number.getText(),tf_name.getText(),tf_address.getText(),tf_phone.getText());   pl.psPerformed(ev);  }   }  public void PsListener(PsEventListener el) {  pl=el; } public void setPnrno(String ptemp) {  tf_number.setText(ptemp); }   public void refresh() {  tf_number.setText("");  tf_name.setText("");  tf_address.setText("");  tf_phone.setText(""); }  }

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/*4* Program file:   Bpanel.java* Creat time:   08/01/2004* Creat by:          InberKong* Last Modify time:* Modify by:       * Function describe: Book panel bean*/import java.beans.*;import javax.swing.*;import java.awt.event.*;import java.awt.*;public class Bpanel extends JPanel implements PsEventListener,ActionListener{ JPanel pnl; BoxLayout blo;

 JLabel label_Date;        JTextField text_Date;          JLabel label_Place;          JTextField text_Place;          JLabel label_NOS;          JTextField text_NOS;          JButton button_Book;   JLabel the_animation;          String bank_Name="FlyMyWay Airlines";          GridBagLayout gl_t;          GridBagConstraints gbcs;          //乘客面板javabeanPsBean pb;

 int t_nos; int t_count; String t_passno;

        //Date format property with getter and setter methods            private String the_datFormat="mm/dd/yy";        public String getDatFormat()        {              return the_datFormat;        }        public void setDatFormat(String temps)        {              the_datFormat=temps;              if(the_datFormat=="mm/dd/yy")                   text_Date.setText("mm/dd/yy");              if(the_datFormat=="dd/mm/yy")                   text_Date.setText("dd/mm/yy");       if(the_datFormat=="dd-Month-yy")     text_Date.setText("dd-Month-yy");        }                public Bpanel()        {  pnl=new JPanel(); the_animation=new JLabel(bank_Name); label_Date=new JLabel("Enter Date of Travel:");    text_Date=new JTextField(20);    text_Date.setText(the_datFormat);

           label_Place=new JLabel("Enter Place of Travel:");           text_Place=new JTextField(15); label_NOS=new JLabel("Enter Number of seats to be booked"); text_NOS=new JTextField(5);           button_Book=new JButton("BOOK SEATS");

    gl_t=new GridBagLayout();  gbcs=new GridBagConstraints();  pnl.setLayout(gl_t);    gbcs.gridx=3;  gbcs.gridy=10;  gbcs.anchor=GridBagConstraints.NORTHWEST;  gl_t.setConstraints(the_animation,gbcs);  pnl.add(the_animation);

  gbcs.gridx=2;  gbcs.gridy=20;  gbcs.anchor=GridBagConstraints.NORTHWEST;  gl_t.setConstraints(label_Date,gbcs);  pnl.add(label_Date);    gbcs.gridx=4;  gbcs.gridy=20;  gbcs.anchor=GridBagConstraints.NORTHWEST;   gl_t.setConstraints(text_Date,gbcs);  pnl.add(text_Date);

  gbcs.gridx=2;  gbcs.gridy=30;  gbcs.anchor=GridBagConstraints.NORTHWEST;  gl_t.setConstraints(label_Place,gbcs);  pnl.add(label_Place);    gbcs.gridx=4;  gbcs.gridy=30;  gbcs.anchor=GridBagConstraints.NORTHWEST;   gl_t.setConstraints(text_Place,gbcs);  pnl.add(text_Place);

  gbcs.gridx=2;  gbcs.gridy=40;  gbcs.anchor=GridBagConstraints.NORTHWEST;  gl_t.setConstraints(label_NOS,gbcs);  pnl.add(label_NOS);    gbcs.gridx=4;  gbcs.gridy=40;  gbcs.anchor=GridBagConstraints.NORTHWEST;   gl_t.setConstraints(text_NOS,gbcs);  pnl.add(text_NOS);

  gbcs.gridx=3;  gbcs.gridy=50;  gbcs.anchor=GridBagConstraints.NORTHWEST;   gl_t.setConstraints(button_Book,gbcs);  pnl.add(button_Book);   button_Book.addActionListener(this);   textDisplay();  pb=new PsBean();  pb.PsListener(this);

  blo=new BoxLayout(this,BoxLayout.Y_AXIS);  this.setLayout(blo);  blo.addLayoutComponent("Booking Panel",pnl);  blo.addLayoutComponent("Passenger Panel",pb);  this.add(pnl);  this.add(pb);  pb.setVisible(false);            }   public void textDisplay() {   Font f=new Font("Times New Roman",Font.BOLD,30);   the_animation.setFont(f);   the_animation.setText(bank_Name); }         public void actionPerformed(ActionEvent evt) {  Object obj=evt.getSource();  try{      if(Integer.parseInt(text_NOS.getText())==0)     JOptionPane.showMessageDialog(this,new String("Number of Passengers >0"));        if(obj==button_Book  && (Integer.parseInt(text_NOS.getText())>0))      {       text_Date.setEnabled(false);       text_Place.setEnabled(false);       text_NOS.setEnabled(false);       button_Book.setEnabled(false);              t_count=1;     t_passno=text_Place.getText().trim()+text_Date.getText().trim()+String.valueOf(t_count);       t_nos=Integer.parseInt(text_NOS.getText());       pb.setPnrno(t_passno);       pb.setVisible(true);      }   }       catch(Exception e)       {   JOptionPane.showMessageDialog(this,new String("NumberFormat For input string is wrong,plese check it!"));              }    } public void psPerformed(PsEvent evt)  {    t_count++;  if(t_count<=t_nos)  {  t_passno=text_Place.getText().trim()+text_Date.getText().trim()+String.valueOf(t_count);  pb.refresh();  pb.setPnrno(t_passno);  }  else  {  pb.setVisible(false);  t_count--;  JOptionPane.showMessageDialog(this,new String("Number of Passenger Added : "+t_count));  text_Date.setText(the_datFormat);  text_Place.setText("");  text_NOS.setText("");  text_Date.setEnabled(true);  text_Place.setEnabled(true);  text_NOS.setEnabled(true);  button_Book.setEnabled(true);  pb.refresh();  t_nos=0;  t_count=0;  }    }        } 

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/*5* Program file:   app.java* Creat time:   08/01/2004* Creat by:          InberKong* Last Modify time:* Modify by:       * Function describe: FlyMyWay Airlines*/import javax.swing.*;import java.awt.event.*;import java.awt.*;public class app extends JFrame { Bpanel panel=new Bpanel();//javabean   public app()   {    this.getContentPane().add(panel);    this.pack();      this.setVisible(true);   }   public static void main(String args[])   {      new app();   }}------------------