leiziyyds: 厉害👍

德全天合: [code=java] public interface Vehicles { void work(); } public class Horse implements Vehicles{ public void work(){ System.out.println("骑马。"); } } class Boat implements Vehicles{ public void work(){ System.out.println("乘船。"); } } public class VehiclesFactory { private static Horse horse = new Horse(); private static Boat boat = new Boat(); public static Vehicles getVehicles(String road){ if("普通情况".equals(road)){ return horse; }else if("大河".equals(road)){ return boat; }else{ return horse; } } } class Person{ private String name; VehiclesFactory vehicles; public Person(String name){ super(); this.name = name; } } public class PersonTest { public static void main(String[] args) { Person person = new Person("唐僧"); // person.common(); // person.passRiver(); person.vehicles.getVehicles("普通情况").work(); person.vehicles.getVehicles("大河").work(); } } 您好，请问这道题这么写行么？ [/code]

luckyapelete 回复 扬帆向海 : 嗯，初学 算是一个学习过程的记录吧。向大神看齐

扬帆向海 : 冒泡排序还可以优化一下