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Then I think a GridLayout is not what you want. In a GridLayout, "each cell is exactly the same size." (From the How to Use GridLayout page.) That's great for chess/checker boards, tic-tac-toe,...

Are the 15 lines of info of the same format:

JLabel, JComboBox
JLabel, JComboBox
JLabel, JComboBox

etc. , 15 times?

You had a third column. What was that for?

You might want to experiment with FlowLayout. I don't know what else you plan to add to the interface, but setting the layout to a FlowLayout and then adding the JLabel and JComboBox will give you...