package com.swift;//使用无参构造方法自动生成对象，序号不断自增public class Person {    private static int count; //如果在定义类时，使用的是静态的属性，则得到的结果是不同的。count生命周期长，与类相同    public int id;    public String name;    public int age;    public String city;    public Person() {        super();        count++;        this.id=count;        this.name="NoName"+count;        this.age=20;        this.city="蜀国";        System.out.println("生产了 "+count+" 个实例化对象");//调用空参构造方法时输出            }    public Person(int id ,String name,int age,String city) {        this.id=id;        this.name=name;        this.age=age;        this.city=city;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public String getCity() {        return city;    }    public void setCity(String city) {        this.city = city;    }    public String getInfo() {        return "The Person is id=" + id + ", name=" + name + ", age=" + age + ", city=" + city ;    }    }