How can I add multiple arrays to a JComboBox?

问题

I am making a theatre seat bookings system for some coursework but am having trouble on creating a JComboBox to help the user select a seat from the set of 197 that there are altogether.

The seats are represented by "Seat" objects which are merely a collection of a few variables such as "isBooked" (Boolean). The seats are arranged into multiple seat arrays, each array represents a row of seats e.g. A[], B[]...

For the booking of the seats, having the seats separated by row was necessary as they have different prices, however the JComboBox will be used as a way of selecting a seat to unbook and hence just a full list of seats is required.

I can easily add a single array to the JComboBox and have it work fine but an attempt to add any more arrays to the list in the JComboBox fails.

How can I add multiple arrays to the JComboBox? i.e. A[1], A[2], A[3]... A[14], B[1], B[2]...

I am not very experienced in Java so sorry if this is a stupid question. After lots of research over the past few days, I have tried experimenting with the DefaultComboBoxModel class but am obviously not using it correctly. This was my most recent attempt to solve my problem:

DefaultComboBoxModel model = new DefaultComboBoxModel();
            model.addElement(A);
            model.addElement(B);
            model.addElement(C);
            model.addElement(D);
            model.addElement(E);
            model.addElement(F);
            model.addElement(G);
            model.addElement(H);
            model.addElement(J);
            model.addElement(K);
            model.addElement(L);
            JComboBox seatCombobox = new JComboBox();
            seatCombobox.setModel(model);
            unbookSeatWindow.buttonsPanel.add(seatCombobox);

All help will be appreciated.

回答1:

Your DefaultComboBoxModel code is the correct answer. You just add elements from as many arrays as you have.

May I suggest that you use two JComboBox components. One for the section, and another for the seat number. Otherwise, your users will get frustrated reading a list of hundreds of seats.

回答2:

You can fill the model in following way using ArrayList:

    DefaultComboBoxModel model ;
    JComboBox seatCombobox = new JComboBox();
    public void fillModel()
    {
      ArrayList<String> elements = new ArrayList<String>();
      elements.addAll(java.util.Arrays.asList(A));
      elements.addAll(java.util.Arrays.asList(B));
      elements.addAll(java.util.Arrays.asList(C));
      elements.addAll(java.util.Arrays.asList(D));
      elements.addAll(java.util.Arrays.asList(E));
      elements.addAll(java.util.Arrays.asList(F));
      elements.addAll(java.util.Arrays.asList(G));
      elements.addAll(java.util.Arrays.asList(H));
      elements.addAll(java.util.Arrays.asList(I));
      elements.addAll(java.util.Arrays.asList(J));
      elements.addAll(java.util.Arrays.asList(K));
      elements.addAll(java.util.Arrays.asList(L));
      model = new DefaultComboBoxModel(elements.toArray()) ;
      seatCombobox.setModel(model);
    }

来源：https://stackoverflow.com/questions/15644063/how-can-i-add-multiple-arrays-to-a-jcombobox

标签

java

arrays

swing

jcombobox