4.ArrayList集合--day07_12_对象数组

引入

题目：定义一个数组，用来存储3个Person对象

Person类

package com.iflytek.day07.demo04;

public class Person {
    
    

    private String name;
    private int age;

    public Person() {
    
    
    }

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

    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;
    }
}

Demo01Array类

package com.iflytek.day07.demo04;

/*
题目：定义一个数组，用来存储3个Person对象
数组有一个缺点：一旦创建，程序运行期间长度不可以发生改变
*/
public class Demo01Array {
    
    
    public static void main(String[] args) {
    
    
        Person[] array = new Person[3];

        Person one = new Person("迪丽热巴",18);
        Person two = new Person("古力娜扎",28);
        Person three = new Person("扎尔马哈",38);

        //将one中的地址值赋值到数组的0号元素位置
        array[0] = one;
        array[1] = two;
        array[2] = three;

        System.out.println(array[0]); // 地址值
        System.out.println(array[1]); // 地址值
        System.out.println(array[2]); // 地址值

        System.out.println(array[1].getName()); // 古力娜扎
        System.out.println(two.getName());  //古力娜扎

    }
}