I want to develope stock ticker application in java. I dont know how to update JTable's specific cell's backcolour. In my application one thread running in background which randomly update's cell's text which is integer. I want to change cell's colour on the time of update. If previous cell's value is less than new value than cell's background colour shold become blue otherwise it would become blue. I am using my own cell renderer for this task. I am able to change cell's colour but on next update all the cell's colour change to default. I want that previously changed cell colour should remain same on next update. Please help me if u know the answer. Thanx in Advance.