How to make only one checkbox ticked in JTable?

Question

I have a JTable of 5 columns and 20 rows. The headers are Name, ID, Present, Absent, Late.

I would like to restrict the user from being able to tick all 3 boxes as obviously that wouldn't make sense.

What is the simplest way of doing this so that if for example, present is ticked, then absent is ticked the present value would change to false.

Here is a basic version of my code. lol please ignore how bad it is i'm fairly new to programming.

JPanel classRegPanel = new JPanel(null); //layout

Object data[][]= new Object[10][5];  
String columns[]={"Name","ID","Present", "Absent", "Late"};  

DefaultTableModel model = new DefaultTableModel(data, columns) {

boolean[] canEdit = new boolean[]{
                false, false, true, true,true
        };

        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return canEdit[columnIndex];
        }

@Override
public Class<?> getColumnClass(int columnIndex)
{
    return columnClass[columnIndex];
}};

JTable table=new JTable(model);  

JScrollPane scrollPane=new JScrollPane(table);    

final Class[] columnClass = new Class[] 
{
String.class, Integer.class, Boolean.class, Boolean.class,Boolean.class
};


public void Setup()
 {
this.setLayout(new FlowLayout());
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    

this.add(scrollPane);

this.setTitle("Register");
this.setSize(500,380);
this.setVisible(true);
this.setResizable(false);
 }

public static void main(String[] args )
 {
    ClassRegister cr = new ClassRegister();
    cr.Setup();
 }

you can either add an actionlistener to each checkbox or you use radiobuttons with a group (might also work with checkboxes) — XtremeBaumer, Dec 02 '16 at 15:55
This is not a trivial question and would involve first of all setting up your model so that it would allow selection of only one of the three items held in a row of data. Then you would need to create proper renderers and editors. — DontKnowMuchBut Getting Better, Dec 02 '16 at 16:05
Combine the three columns into one column and use a combo box as the editor with the 3 values to choose from. — camickr, Dec 02 '16 at 16:07

score 0 · Answer 1 · answered Dec 02 '16 at 15:56

0

Checkboxes allow for multiple selections by design. If you only want ONE seelcted at a time, use radio buttons instead of checkboxes, this is exactly what they are for. see: http://www.w3schools.com/html/tryit.asp?filename=tryhtml_form_radio

answered Dec 02 '16 at 15:56

Patrick Schaefer

821
10
20

1

(1-) that link has nothing to do with Swing. The columns of data in a JTable are not real components. You can't just treat the data as radio buttons. – camickr Dec 02 '16 at 16:10

How to make only one checkbox ticked in JTable?

1 Answers1