car [ ] carForRent={new passengerCar(1,"奥迪A4",500,4),
new passengerCar(2,"马自达6",400,4),
new pickUp(3,"皮卡雪6",450,4,2),
new passengerCar(4," 金龙 ",800,20),
new trunk(5,"松花江",400,4),
new trunk(6,"依维柯",1000,20)};
比如 new trunk(6,"依维柯",1000,20)如果不直接在这里写，在子类里写？怎么写？括号里的6,"依维柯",1000,20是对象的属性？
比如写成
passengerCar a1=new passengerCar(1,"奥迪A4",500,4);
passengerCar a2=new passengerCar(2,"马自达6",400,4);
pickUp b1=new pickUp(3,"皮卡雪6",450,4,2);
passengerCar a3=new passengerCar(4," 金龙 ",800,20);
trunk c1=new trunk(5,"松花江",400,4);
trunk c2=new trunk(6,"依维柯",1000,20);
Car carForRent[]=[a1,a2,b1,a3,c1,c2];
这么写对不对？
太深奥，回答不起