在Java中如何使用多态实现统一调用_OOP多态调用技巧

class Animal {
    void makeSound() {
        System.out.println("Animal makes a sound");
    }
}

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

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

Animal a1 = new Dog();
Animal a2 = new Cat();
a1.makeSound(); // 输出: Woof!
a2.makeSound(); // 输出: Meow!

interface Drawable {
    void draw();
}

class Circle implements Drawable {
    public void draw() {
        System.out.println("Drawing a circle");
    }
}

class Rectangle implements Drawable {
    public void draw() {
        System.out.println("Drawing a rectangle");
    }
}

Drawable d1 = new Circle();
Drawable d2 = new Rectangle();
d1.draw(); // Drawing a circle
d2.draw(); // Drawing a rectangle

List<Animal> animals = Arrays.asList(new Dog(), new Cat(), new Dog());
for (Animal animal : animals) {
    animal.makeSound(); // 自动调用各自实现
}