public static void main(String[] args) {

// TODO Auto-generated method stub

SetTest si= new SetTest();

si.testAdd();

si.testForEach();

//創(chuàng)建一個(gè)學(xué)生對(duì)象

Student student=new Student("1","小華");

System.out.println("歡迎學(xué)生"+student.name+"來(lái)選課");

? ? ? }

執(zhí)行到這一步Student student=new Student("1","小華");他對(duì)Student報(bào)錯(cuò)，說(shuō)Student cannot be resolved to a type意思就是學(xué)生不能分解成一種類型。為什么視頻里老師的就不會(huì)報(bào)錯(cuò)我改怎么解決