VIP35/src/main/java/com/sf/day08/Person.java

package com.sf.day08;

public class Person {
    public String name;

    public int age;

    /**
     * 构造器的作用 ：  对象的创建  属性的赋值
     *创建无参构造器  有参构造器
     */

    public  double weight;

    public Person(){

    }

    public Person(int age ){
        this.age = age;
    }

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

    public Person(String name,int age,double weight ){
        this(name,age);
        this.weight = weight;
        }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", weight=" + weight +
                '}';
    }

    public static void main(String[] args) {
//       Person person = new Person(13);
        Person person1 = new Person("zs", 13, 123.0);
        System.out.println(person1);
    }


}