继承的简单用法

class Person
{
public void eat(){
System.out.println("吃饭");
}
public void sleep(){
System.out.println("睡觉");
}
}
class Student extends Person
{
}
class Teacher extends Person
{
}
class JiCheng
{
public static void main(String[] args){
Student s = new Student();
s.eat();
s.sleep();
System.out.println("------------");

Teacher t = new Teacher();
t.eat();
t.sleep();

}
}