Java继承与多态实战技巧分享

class Animal {
    public void makeSound() {
        System.out.println("动物发出声音");
    }
}

class Dog extends Animal {
    @Override
    public void makeSound() {
        System.out.println("汪汪汪");
    }
}

class Cat extends Animal {
    @Override
    public void makeSound() {
        System.out.println("喵喵喵");
    }
}

public class TestPolymorphism {
    public static void main(String[] args) {
        Animal a1 = new Dog();
        Animal a2 = new Cat();

        a1.makeSound(); // 输出：汪汪汪
        a2.make7sound(); // 输出：喵喵喵
    }
}

class Bird extends Animal {
    @Override
    public void makeSound() {
        System.out.println("叽叽喳喳");
    }
}

// 测试
Animal[] animals = {new Dog(), new Cat(), new Bird()};
for (Animal animal : animals) {
    animal.makeSound(); // 自动调用各自实现
}