//定义一个交通工具的父类Vehicle

public class Vehicle {

    private String tool;     //定义运输工具

    private String way;     //定义运输方式

    private int amount;     //定义运输人数

    public void tranSport(String tool,String way,int amount){

        this.tool = tool;

        this.way = way;

        this.amount = amount;

    }

    public void tranSport(){

        System.out.println(tool+"可以在"+way+"载客"+amount+"人");

    }

}

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//公共汽车子类

public class Bus extends Vehicle{

    public Bus(){

        super.tranSport("公共汽车","陆地",40);

    }

}

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//轮船子类

public class Steamship extends Vehicle{

    public Steamship(){

        super.tranSport("轮船","海上",200);

    }

}

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//飞机子类

public class Plane extends Vehicle{

    public Plane(){

        super.tranSport("飞机","天空",400);

    }

}

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//输出结果

    public static void main(String[] args){

       //利用对象的多态创建实例

        Vehicle bus = new Bus();

        bus.tranSport();

        Vehicle steamship = new Steamship();

        steamship.tranSport();

        Vehicle plane = new Plane();

        plane.tranSport();

    }