public class Student1 {
    static String words = "全局变量";
    public void getStu(){
        String words = "局部变量";
        System.out.println("words 变量现在是："+words);
        System.out.println("访问全局变量："+this.words);
    }
    public static void main(String[]args){
        Student1 student = new Student();
        student.getStu();
    }

}

出现的错误是
Exception in thread "main" java.lang.Error: Unresolved compilation problem:
    Student cannot be resolved to a type

    at Student1.main(Student1.java:10)

有人吗