class Animal{
void eat(){
System.out.println("吃东西");//父类
}
class Dog extends Animal{
@Override
void eat() {
System.out.println("吃狗粮");//子类
}
}
public class Test {
public static void main(String[] args) {
//父亲类型 变量名 = new 子类对象
Animal animal = new Dog();
animal.eat();
}
}