java 接口的运用

package 接口运用;
interface Person{
 public void eat();
 public void sleep();
 public void play();
 
}
class Student implements Person{
 String StudentClass;
 public Student(String StudentClass) {
  this.StudentClass=StudentClass;
 }
 public void eat() {
  System.out.println(StudentClass+"在食堂吃饭！");
 }
 public void sleep() {
  System.out.println(StudentClass+"在寝室睡觉！");
 }
 public void play() {
  System.out.println(StudentClass+"在操场上玩！");
 }
}
class Teacher implements Person{
 String TeacherClass;
 public Teacher(String TeacherClass) {
  this.TeacherClass=TeacherClass;
 }
 public void eat() {
  System.out.println(TeacherClass+"在教师食堂吃饭！");
 }
 public void sleep() {
  System.out.println(TeacherClass+"住在双创楼！");
 }
 public void play() {
  System.out.println(TeacherClass+"在双创楼打麻将");
 }
}
class Parents implements Person{
 String ParentsClass;
 public Parents(String  ParentsClass) {
  this. ParentsClass= ParentsClass;
 }
 public void eat() {
  System.out.println( ParentsClass+"在城市印象二楼吃饭"); 
 }
 public void sleep() {
  System.out.println( ParentsClass+"在城市印象住着");
 }
 public void play() {
  System.out.println( ParentsClass+"在城市印象打麻将！");
 }
}
public class Dome3 {
 public static void main(String[]args) {
  Person s = new Student("毛塘铺大学生");
  System.out.println("大家好，我在毛塘铺读大学，也就是养老！");
  s.eat();
  s.sleep();
  s.play();
  Person t = new Teacher("毛塘铺老师");
  System.out.println("大家好，我在毛塘铺教书！");
  t.eat();
  t.sleep();
  t.play();
  Person p = new Parents("毛塘铺的取款机");
  System.out.println("大家好，我的子女在毛塘铺读书，所以我叫毛塘铺的取款机！");
  p.eat();
  p.sleep();
  p.play();
  }
}