我写了下面这段代码:classPlane{}classAirbusextendsPlane{}publicclassMain{voidfly(Planep){System.out.println("I'minaplane");}voidfly(Airbusa){System.out.println("I'minthebestAirbus!");}publicstaticvoidmain(String[]args){Mainm=newMain();Planeplane=newPlane();m.fly(plane);Airbusairbus=newAirbus();m.fly(airbu