JAVA代码优化

[Lin_bai_]

import javax.sql.rowset.spi.SyncResolver;

interface Greetings//问候接口
{
void say();
}
interface work//工作接口
{
void say1();
}
class Student implements Greetings
{
public void say()
{
System.out.println("peter:老师好");
}
}
class Teacher implements Greetings
{
public void say()
{
System.out.println("mike:同学们好");
}
}

class Student1 implements work
{
public void say1()
{
System.out.println("mike:老师开始上课");
}
}
class Teacher1 implements work
{
public void say1()
{
System.out.println("peter:老师开始记笔记");
}
}
class Main
{
public static void main(String[] args)
{
Greetings[] says = {new Student(),new Teacher()};
work[] says1 = {new Student1(),new Teacher1()};
for (int i = 0;i<says.length;i++)
{
says[i].say();
}
for (int i = 0;i<says1.length;i++)
{
says1[i].say1();
}
}
}
这个代码还可以优化吗？？？？

[fengchuiqi_]

    interface Greetings{//问候接口
        void say();
    }
    interface work extends Greetings{//工作接口继承问候接口
        void say();
        void say1();
    }
    static class Student implements work{//学生类实例化工作接口继承say方法和say1方法
        public void say(){
            System.out.println("peter:老师好");
        }
        public void say1(){
            System.out.println("mike:老师开始上课");
        }
    }
    static class Teacher implements work{//教师类实例化工作接口继承say方法和say1方法
        public void say(){
            System.out.println("mike:同学们好");
        }
        public void say1(){
            System.out.println("peter:老师开始记笔记");
        }
    }

    static class Main {
        public static void main(String[] args) {
            work[] says = {new Student(),new Teacher()};
            for (int i = 0;i<says.length;i++) {
                says[i].say();
            }
            for (int i = 0;i<says.length;i++) {
                says[i].say1();
            }
        }
    }

可以优化，但优化没有意义，这片代码应该是说明接口的作用，接口和类的区别

[Lin_bai_]

好的谢谢 麻烦看下我其他的帖子很急 大佬