base() 和 this() 构造函数最佳实践

Java
class Animal {
    private String name;
    
    public Animal(String name) {
        this.name = name;
    }
}
class Dog extends Animal {
    private String breed;
    
    public Dog(String name, String breed) {
        base(name);
        this.breed = breed;
    }
}

Java
class Person {
    private String name;
    private int age;
    
    public Person(String name) {
        this(name, 18);
    }
    
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}