java - Auto scaling few Components at the same time -

saying going make game moving ball on background image , few obstacles. have jpanel on left side few buttons. made jsplitpane buttonpanel on left side , try make part game on right side of jsplitpane.

i hava part game auto scaling both background , obstacles whenever change size of window. (background, , obstacles in diffrent classes extends jpanel). how make auto scaling together??

please :) appreciated.

sorry english it's not native language, still learning ;-)