Date update in a JTable cell

Question

Can someone tell me how I would go about displaying the current date and time in a cell and updating it every 5 seconds. I assume I would have to perform a repaint() at runtime every 5 seconds.

Answer 1

Using this example, for some reason I can't get the
time to appear in the desired cell. Even when I
explicitly insert a string "Foo" into the cell, the
setValue still doesn't show "Foo". Fix this first. Even if you have to remove your table model and editors and renderers.
My JTable is
extending AbstractTableModel and for that particular
cell, I set the column class to
SimpleDateFormat.class. Don't do this. This makes the UI look for a readerer/editor which can handle objects of the simpledateformat class. You probably shouldn't put simpledateformat objects into the cells of a table.
I also have this line
tableData.setDefaultRenderer(String.class, new
MultiLineCellRenderer());. This will make cells which return String.class as the class type use your MultiLineCellRenderer unless there is a different renderer on the column.
I have a println
outputting the value of the cell in question and it
appears that the setValue isn't working. I hope that
I'm clear with my question. Any thoughts. If setValueAt isn't executing, you are going to have problems.
Just had a
thought. Do I need to override setValueAt in my
TableModel the same way I override getValueAt,
getColumnCount, getRowCount, etc. etc.Probably. If you are extending DefaultTableModel, it's going to be using it's own store for the data in the table. You probably have implemented your own data storage. Make your table model use it.