package com.swift;
//使用無參構造方法自動生成對象，序號不斷自增
public class Person {
    private static int count; //如果在定義類時，使用的是靜態的屬性，則得到的結果是不同的。count生命周期長，與類相同
    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="蜀國";
        System.out.println("生產了 "+count+" 個實例化對象");//調用空參構造方法時輸出
        
    }
    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 ;
    }
    
}

Java中什麽是匿名對象，空參構造方法輸出創建了幾個匿名對象，屬性聲明成static