Dog.java
public class Dog { public String toString() {
return "一只小狗";
}
}
Cat.java
public class Cat { public String toString() {
return "一只小花猫";
}
}public class NewClass { public static void main(String args[]) {
ShowObject<Dog> showDog = new ShowObject<Dog>();
showDog.showMess(new Dog());
ShowObject<Cat> showCat = new ShowObject<Cat>();
showCat.showMess(new Cat());
}
}
public class ShowObject<E>{
public showMess (E b){
String mess = b.toString();
System.out.println(mess);
}
}
String mess = b.toString();
System.out.println(mess);
}这是你写的方法?没有返回值啊,大哥。你以为构造方法啊。拜托别照书敲代码,动下脑!!!!