public class Vehicles {? ? ? ?//父類

public static void main(String[] args) {

Vehicles obj1 = new Vehicles();

Vehicles obj2 = new Bus();

Vehicles obj3 = new boat();

Vehicles obj4 = new airplane();

obj1.way();? ?

}

}

public class Bus extends Vehicles {? //子類BUS

int number=50;

String name="bus";

String function="陸地";

? public? void way() {

System.out.println("載客"+number+"人的"+name+"是在"+function+"上運行的");

}

}

public class boat extends Vehicles {? //子類BUS

int number=500;

String name="boat";

String function="海洋";

? public? void way() {

System.out.println("載客"+number+"人的"+name+"是在"+function+"上運行的");

}

}

public class airplane extends Vehicles {? ? //子類airplane

int number=1000;

String name="airplant";

String function="天空";

void way() {

System.out.println("載客"+number+"人的"+name+"是在"+function+"上運行的");

}

}