问Java中的侦听器有问题。我有一个下拉框不能像我需要的那样通过用户选择

EN

///Occupancy///
JLabel label2 = new JLabel("Please Select the Number of Occupants");
JComboBox occupancy_list = new JComboBox(occupancy_string);
occupancy_list.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
          int number = Integer.parseInt((String) selection);
      }
});
String selection = (String) occupancy_list.getSelectedItem();
int number = Integer.parseInt((String) selection);
if(number>2)
{
  style=(style2);
}
else
{
  style=(style1);
}

///Room Type///
JLabel label3 = new JLabel("Please Select a Room Style");

//Creates RoomStyle Drop Down
JComboBox room_type = new JComboBox(style);
roomtype_string=(String) room_type.getSelectedItem();
room_type.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent event)//Listener for Room Style Drop Down
      {

          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();

      }
});
String selection2 = (String) room_type.getSelectedItem();
if(selection2.equals("Cabin"))
{
  room_number=(cabin_string);
}
else
{
  room_number=(suite_string);
}

///Room Selection///
JLabel label4 = new JLabel("Please Select a Room");

//Creates RoomNumber Drop Down
JComboBox room_list = new JComboBox(room_number);
roomselected = (String) room_list.getSelectedItem();
room_list.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
      }
});
String selection3 = (String) room_list.getSelectedItem();

//Dining
JLabel label5 = new JLabel("Please Select a Dining Time");
JComboBox dining_list = new JComboBox(dining_string);
dining_list.addActionListener(new ActionListener()
{
    public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
      }
});
String selection4 = (String) dining_list.getSelectedItem();

    ///Occupancy///
    JLabel label2 = new JLabel("Please Select the Number of Occupants");
    JComboBox occupancy_list = new JComboBox(occupancy_string);
    Occupancy_Listener occupancy = new Occupancy_Listener();
    occupancy_list.addActionListener(occupancy);
    //updateStyle(occupancy_string[occupancy_list.getSelectedIndex()]);

    ///Room Type///
    JLabel label3 = new JLabel("Please Select a Room Style");

    //Creates RoomStyle Drop Down
    JComboBox room_type = new JComboBox(style);
    Style_Listener styleListen = new Style_Listener();
    room_type.addActionListener(styleListen);
    //updateNumber(style[room_type.getSelectedIndex()]);

    ///Room Selection///
    JLabel label4 = new JLabel("Please Select a Room");

    //Creates RoomNumber Drop Down
    JComboBox room_list = new JComboBox(room_number);
    Room_Listener room = new Room_Listener();
    room_list.addActionListener(room);
    //updateRoom(room_number[room_list.getSelectedIndex()]);

    //Dining
    JLabel label5 = new JLabel("Please Select a Dining Time");
    JComboBox dining_list = new JComboBox(dining_string);
    Din_Listener dining = new Din_Listener();
    dining_list.addActionListener(dining);
    //updateDin(dining_string[dining_list.getSelectedIndex()]);
    ...
    ...
    ...
    ...
    ...
  }

  private class Occupancy_Listener implements ActionListener
  {
      public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
          System.out.println(selection);
          System.out.println(style[0]);
          System.out.println(room_number[0]);
          updateStyle(selection);
      }

  }

  private class Style_Listener implements ActionListener
  {
      public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {


          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
          updateNumber(selection);

      }
  }
  private class Room_Listener implements ActionListener
  {
      public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
          updateRoom(selection);
      }
  }
  private class Din_Listener implements ActionListener
  {
      public void actionPerformed(ActionEvent event)//Listener for Occupancy Drop Down
      {
          JComboBox cb = (JComboBox)event.getSource(); //grab the user selection
          String selection = (String) cb.getSelectedItem();
          updateDin(selection);
      }
  }
  protected void updateStyle(String pick) 
  {
      String[] style1 ={"Cabin", "Suite"};
      String[] style2 ={"Suite"};
      //ocu_string=pick;
      number = Integer.parseInt(pick);
      if(number>2)
      {
        style=style2;
      }
      else
      {
        style=style1;
      }
  }
  protected void updateNumber(String pick) 
  {
      String[] cabin_string = {"11-1","11-2","11-3","11-4","11-5","11-6","11-7","11-8","11-9","11-10"};
      String[] suite_string = {"11-S1","11-S2"};
      type=pick;
      if(type.equals("cabin"))
      {
          room_number=cabin_string;
      }
      else
      {
          room_number=suite_string;
      }
  }
  protected void updateRoom(String pick) 
  {
      room_num=pick;
  }
  protected void updateDin(String pick) 
  {
      din_time=pick;
  }
  //public String getPopulation()
  {
      //return ocu_string;
  }