package?工作;
public?class?Jiaotong?{
public?void?show(){
int?num=50;
System.out.println("汽車客運在陸地上運輸"+num+"名客人！");
}
}package 工作;public class YouLun extends Jiaotong { public void shwo(){ int num=200; System.out.println("游輪可以在水中搭"+num+"名客人！"); }}package 工作;public class Test { public static void main(String[] args) { Jiaotong s =new Jiaotong(); Jiaotong s1=new YouLun(); ? YouLun s2=new Feiji(); ? ?s.show(); ? ?s1.show()；沒能調用子類的方法 }}
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