6.1单继承类 Location Point #x int -x:it y int y:in +Location(in x int=0,in y:int=0) +moveTo in x int,in y:int) -visibb +getX() Pont(nx:nny:n visible:nfalse) +getYO +setX(in x int) Point) +setY(in y int) H+GetX():int HGetY:imt Point +SetX(inx:int):void -visible:bool +SetY(iny:imt):void +Point(in x:int=0,in y:int=0,in v:bool =true) isVisible(:bool +Show):void +show):void +Hid:void +hide():void +moveTo(in x int,in y int):void6.1单继承类