How to create a drop-down list in java swing with multiple item selection?

Question

I\'m aware of JList and JComboBox. I need the combo box drop down functionality with multiple selection functionality that JList provi

Answer 1

You can make a custom cell renderer for the combobox and add checkboxes to that components, so you can check and uncheck them. You have to make something like this:

public class MyComboBoxRenderer implements ListCellRenderer {

    private String[] items;
    private boolean[] selected;

    public MyComboBoxRenderer(String[] items){
         this.items = items;
         this.selected = new boolean[items.lenght];
    }

    public Component getListCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int index) {
         // Create here a JLabel with the text
         // Create here a JCheckBox
         // Add them to a layoutmanager
         return this;
    }

    public void setSelected(int i, boolean flag)
    {
         this.selected[i] = flag;
    }

}