javase_test_day13

类

Person

package com.atguigu.test;

public class Person {
    public int id;
    public String name="父亲";

    public Person(){
        super();
    }

    public void eat(){
        System.out.println("吃饭");
    }

    public void run(){
        System.out.println("奔跑");
    }


}

Student

package com.atguigu.test;

public class Student extends Person{
    public double score;

    @Override
    public void eat() {
        System.out.println("吃食堂");
    }

    public void study(){
        System.out.println("在学习");
    }
}

Employee

package com.atguigu.test;

public class Employee extends Person{
    public double salary=2000;
    public String name="打工人";

    @Override
    public void eat() {
        System.out.println(name+"吃员工餐"+salary);
    }

    public void working(){
        System.out.println("打工人在工作");
    }


}

测试类

package com.atguigu.test;
/*练习：
        创建若干个Student或者Employee对象，存储起来。
        循环遍历每个成员，调用其eat方法
        如果是员工就调用working
        如果是学生就调用学习方法*/
public class Test1 {
    public static void main(String[] args) {
        Person[] persons = new Person[3];
        persons[0] = new Employee();
        persons[1] = new Student();
        persons[2] = new Employee();

        for (int i = 0; i < persons.length; i++) {
            persons[i].eat();
            if(persons[i] instanceof Employee){
                Employee employee = (Employee) persons[i];
                employee.working();
            }else if(persons[i] instanceof Student){
                Student student = (Student) persons[i];
                student.study();
            }
        }


    }

}