Java 继承

继承的格式： class 子类名 extends 父类名{}

如何使用继承：属于同一种类的事物和方法，可以归于同一种类

package debug;

class Person{
    public static void eat(){
        System.out.println("吃饭");
    }
    
    public static void sleep(){
        System.out.println("睡觉");        
    }

}

class Student extends Person {
    
    }


class Teacher extends Person {
    
    }

public class ExtendDemo {
    public static void main(String[] args) {
        Student s = new Student();
        s.eat();
        s.sleep();
        
        Teacher t = new Teacher();
        t.eat();
        t.sleep();
    }
}