Java面向对象编程：抽象类与继承案例 - 猫和狗

// Animal类 public abstract class Animal { private String name; private int age; private String color;

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

public abstract void shout();

public String getName() {
    return name;
}

public int getAge() {
    return age;
}

public String getColor() {
    return color;
}

}

// Cat类 public class Cat extends Animal { public Cat(String name, int age, String color) { super(name, age, color); }

@Override
public void shout() {
    System.out.println('喵喵喵');
}

}

// Dog类 public class Dog extends Animal { public Dog(String name, int age, String color) { super(name, age, color); }

@Override
public void shout() {
    System.out.println('汪汪汪');
}

}

// 测试类 public class Test { public static void main(String[] args) { Animal animal1 = new Cat('小花', 2, '白色'); Animal animal2 = new Dog('小黑', 3, '黑色');

    System.out.println(animal1.getName() + '的叫声：');
    animal1.shout();

    System.out.println(animal2.getName() + '的叫声：');
    animal2.shout();
}

}