Java SE (Java Platform, Standard Edition)

hi

I have a table where everycell in the table is a JCheckBox, but i want certain cells to be diabled during runtime.
so I am trying to reference to the JCheckBox of a specific cell so that i can make it disabled but cant work out how to do this. i have been trying to figure it out for two days with nothing!

bascailly i would like to do something like this

JCheckBox cb= new JCheckBox();
cb = (JCheckBox)table.getModel().getValueAt(2, 2);
cb.setEnabled(false);

(2,2) is just an example but in my program it will be different values everytime depending on conditions

please help I am getting really desperate now
thank you