如何在java中继承特定的实例变量

// 父类 Animal
class Animal {
    protected String name;
    protected int age;

    public Animal(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public void displayInfo() {
        System.out.println("Name: " + name + ", Age: " + age);
    }
}

// 子类 Dog
class Dog extends Animal {
    private String breed;

    public Dog(String name, int age, String breed) {
        super(name, age); // 调用父类的构造方法
        this.breed = breed;
    }

    public void displayBreed() {
        System.out.println("Breed: " + breed);
    }

    @Override
    public void displayInfo() {
        super.displayInfo(); // 调用父类的方法
        displayBreed();
    }
}

// 测试类
public class Main {
    public static void main(String[] args) {
        Dog myDog = new Dog("Buddy", 3, "Golden Retriever");
        myDog.displayInfo(); // 输出: Name: Buddy, Age: 3, Breed: Golden Retriever
    }
}