多态及重写案例演示

利用封装，继承，多态知识点汇集来解决Teatcher和Student不同行为的案例演示，代码如下:

public  abstract class People {

private  String name;

   private int age;

     public  abstract void eat() ;

     public void study() {

  System.out.println("学习了..");

  }

}

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public class Student extends People {

@Override

public void eat() {

// TODO Auto-generated method stub

System.out.println("正在吃鸡");

}

public void study() {

System.out.println("正在学习大数据...");

}

public void travel() {

System.out.println("去叙利亚一日游...");

}

}

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public class Teacher extends People {

@Override

public void eat() {

System.out.println("正在吃大龙呀");

}

public void study() {

System.out.println("正在学习人工智能...");

}

public void play() {

System.out.println("陪宝宝在玩耍");

}

}

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public class Test {

public static void main(String[] args) {

//父类引用  变量名=new  具体的子类();

//点看左 输出看右

//创建一个数组 保存 2个人类的对象

  People  tt=new Teacher();   

      People  ss=new Student();   

      People[] peoples=new People[2];

       peoples[0]=ss;

       peoples[1]=tt;  

       //循环来查看数组中2个对象的 属性和方法

       for (People people : peoples) {

people.eat();

//people.travel();  学生所特有的

//需要再输出 学生和老师的不同的方法

if ( people  instanceof Student) {

Student  student= (Student) people;

student.travel();

}  

if (people instanceof Teacher) {

   Teacher teacher=(Teacher) people;

   teacher.play();

}  

} 

       System.out.println("程序结束");

}

}