Constructor
There are several constructors for sliders.
Here is the one that is most useful:
JSlider( int orientation, int min, int max, int init )
- orientation: 
SwingConstants.HORIZONTAL or 
    SwingConstants.VERTICAL 
- min: the minimum value. 
    The value when the slider is at the extreme left (or very bottom) of its range.
 
- max: the maximum value. 
    The value when the slider is at the extreme right (or very top) of its range.
 
- init: the initial value of the slider