对象数组

案例：有一个数组 它里面有三个Person对象

代码：

封装类：

package demo06.day02;

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;
    }

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

测试类：

public static void main(String[] args) {
    //创建长度为3的数组 存放Person对象
    Person[] per=new Person[3];
    //创建Person对象
    Person p1 = new Person("张三", 13);
    Person p2 = new Person("李四", 15);
    Person p3 = new Person("王五", 19);
    //将Person对象添加到数组中
    per[0]=p1;
    per[1]=p2;
    per[2]=p3;
    //遍历输出
    for (int i = 0; i < per.length; i++) {
        System.out.println(per[i]);
    }

}

数组有一个缺点：一旦创建 程序运行不可以改变