多态数组

package com.jhfuture.poly._polyarr__;

public class PloyArray {
    public static void main(String[] args) {
        Person person[]=new Person[3];
        person[0]=new Person("这是个人");
        person[1]=new Student("小明",15);
        person[2]=new Teacher("李老师",1000);
        for (int i = 0; i <person.length ; i++) {
            //调用每一个say
            //输出结果由每一个运行类型决定
            person[i].say();
            if (person[i] instanceof  Student){
                ((Student)person[i]).Study();
            }else if (person[i] instanceof  Teacher){
                ((Teacher)person[i]).teacher();
            }


        }
    }
}
//应用实例：现有一个

class Person{
    String name;

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

    public void say(){
        System.out.println("here is Person"+getName());
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    Person(){

    }
}
class Student extends  Person{
    String name;
    int age;
    public void say(){
        System.out.println("here is Student"+getName());
    }

    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
    public void Study(){
        System.out.println("可以学习");
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
}
class Teacher extends  Person{
    String name;
    double salery;
    public void say(){
        System.out.println("here is Teacher"+getName());
    }

    public Teacher( String name1, double salery) {
        this.name = name1;
        this.salery = salery;
    }
    public void teacher(){
        System.out.println("可以教书");
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void setName(String name) {
        this.name = name;
    }

    public double getSalery() {
        return salery;
    }

    public void setSalery(double salery) {
        this.salery = salery;
    }
}

//输出
here is Person这是个人
here is Student小明
可以学习
here is Teacher李老师
可以教书