Exception in thread "main" java.lang.IllegalAccessError

在学习对象的创建与使用的时候，遇到如下问题，
Exception in thread "main" java.lang.IllegalAccessError:class OOTest01 tried to access field Student.no (OOTest01 is in unnamed module of loader com.sun.tools.javac.launcher.Main$MemoryClassLoader @282003e1; Student is in unnamed module of loader 'app')
at OOTest01.main(OOTest01.java:29)
我的两个文件的代码分别如下：
OOTest01.java

public class OOTest01
{
    public static void main(String[] args){
            int i = 10;
                Student s = new Student();
                int stuNo = s.no;
        String stuName = s.name;
        boolean stuSex = s.sex;
        int stuAge = s.age;
        String stuAddr = s.addr;

        System.out.println(stuNo);
        System.out.println(stuName);
        System.out.println(stuSex);
        System.out.println(stuAge);
        System.out.println(stuAddr);
    }
}

Student.java

public class Student
{
        int no = 0;
        String name = null;
        int age = 0;
        boolean sex = false;
        String addr = null;
}

请问这种情况如何解决

没有权限访问???把student类改成下列代码试一试

public class Student
{
        public int no = 0;
        public String name = null;
        public int age = 0;
        public boolean sex = false;
        public String addr = null;
 }

class.java 没有定义 package 吧