question: public Rectangle2D shrink ( Rectangle2D area , Rectangle2D result ) { if ( result == null ) { result = new Rectangle2D . Double ( ) ; } result . setRect ( area . getX ( ) + this . left , area . getY ( ) + this . top , area . getWidth ( ) - this . left - this . right , area . getHeight ( ) - this . top - this . bottom ) ; return result ; }
target:  Shrinks an area by the space attributes.