快来个大神帮我解决

public static void main(String[] args) {

// TODO Auto-generated method stub

SetTest si= new SetTest();

si.testAdd();

si.testForEach();

//创建一个学生对象

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

System.out.println("欢迎学生"+student.name+"来选课");

      }

执行到这一步Student student=new Student("1","小华");他对Student报错，说Student cannot be resolved to a type意思就是学生不能分解成一种类型。为什么视频里老师的就不会报错我改怎么解决