Modelling Table scrollbar


I would like to resize the scrollBar of a specific table.
I was able to set the width with:

`event.source.parent.getComponent('TableProducts2').getVerticalScrollBar().setPreferredSize( Dimension(70, Integer.MAX_VALUE))`

but the height of the up/down arrows remains the same, so I would like to change even the arrow buttons dimensions.
I think I should use the setUI() method to set up a new BasicScrollBarUI but I really don’t know how to instantiate a new BasicScrollBarUI to pass to the setUI() method overriding the createDecreaseButton () and createIncreaseButton() methods.