question: private void initializeLayout ( ) { GridLayout gl = new GridLayout ( 0 , 2 ) ; gl . setVgap ( 5 ) ; setLayout ( gl ) ; add ( new JLabel ( "Frozen: " ) ) ; add ( frozenDD ) ; add ( new JLabel ( "Upper Bound:" ) ) ; add ( tfUpBound ) ; add ( new JLabel ( "Lower Bound" ) ) ; add ( tfLowBound ) ; add ( new JLabel ( "Increment:" ) ) ; add ( tfIncrement ) ; add ( new JLabel ( "Delay:" ) ) ; add ( tfDelay ) ; setBorder ( BorderFactory . createEmptyBorder ( 5 , 5 , 5 , 5 ) ) ; }
target:  Lays out the panel