Saving Checklist Selection

Question

I am having trouble figuring out how to do the following. I am trying to enable the user to check the books he wants using my checklist, but I cannot figure out how to save his selections (the checked books) in order to determine the price he has to pay. Here is my checklist code:

for(int k=0;k<catalogue.getCatalogue().size();k++)
    {
        frame.add(new JCheckBox(catalogue.cat.get(k).toString()));
    }


    frame.setLayout(new FlowLayout());
    frame.setSize(900,900);
    frame.setVisible(true);
    frame.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e){System.exit(0);}});

It just shows the list of books (catalogue is an Arraylist containing the books, which I read from a file) with a checkbox beside it. I need help in figuring out how to "save" his selections so that I can store it in another arraylist of books.

Answer 1

You should use an Array/ArrayList of JCheckLists. For example:

JCheckBox[] checkboxes = new JCheckBox[catalogue.getCatalogue().size()];

And then:

for(int k=0;k<catalogue.getCatalogue().size();k++)
{
    checkboxes[k] = new JCheckBox(catalogue.cat.get(k).toString()));
    frame.add(checkboxes[k]);
}

Now you can easily check the state of each checkbox, for example, you can reference the first one by checkboxes[0]