question: private static void addVerticalSmallSpring ( Path2D . Float path , int x0 , int y1 , int y2 ) { int springHeight = 2 ; int springWidth = 2 ; int distance = Math . abs ( y2 - y1 ) ; int numSprings = ( distance / ( springHeight ) ) ; int leftOver = ( distance - ( numSprings * springHeight ) ) / 2 ; path . lineTo ( x0 , y1 ) ; path . lineTo ( x0 , y1 - leftOver ) ; int count = 0 ; if ( y1 > y2 ) { for ( int y = y1 - leftOver ; y > y2 + leftOver ; y -= springHeight ) { int x = ( count % 2 == 0 ) ? x0 - springWidth : x0 + springWidth ; path . lineTo ( x , y ) ; count ++ ; } } else { for ( int y = y1 + leftOver ; y < y2 - leftOver ; y += springHeight ) { int x = ( count % 2 == 0 ) ? x0 - springWidth : x0 + springWidth ; path . lineTo ( x , y ) ; count ++ ; } } path . lineTo ( x0 , y2 + leftOver ) ; path . lineTo ( x0 , y2 ) ; }
target:  Add an vertical spring between (x0, y1) and (x0, y1) to the given path object