package d02.P227;

class Cat4 {
    String name;
    int age;

    public Cat4(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public Cat4(String name) {
        this.name = name;
        this.age = 1; // 默认年龄为 1
    }

    public void self() {
        System.out.println("-miao-");
        System.out.println("My name is " + name + ". I am " + age + " years old.");
    }
}

public class CatTest4 {
    public static void main(String[] args) {
        String str = "";
        if (args.length > 1) {
            str = args[0] + "老先生/女士，您好！";
        }
        System.out.println(str);

        Cat4 firstCat = new Cat4("Mimi", 3);
        firstCat.self();

        Cat4 secondCat = new Cat4("LiLY");
        secondCat.self();
    }
}