Java 在Netbeans中的项目错误中找不到类

以下是我的代码：

package student;
public class Student {
private String idNumber;
private int creditHoursEarned;
private int pointsEarned;

public Student(){
        this.idNumber = "9999";
        this.creditHoursEarned = 3;
        this.pointsEarned = 12;
}
        public String getIdNumber() {
        return idNumber;
}
public void setIdNumber(String idNumber) {
        this.idNumber = idNumber;
}
public int getCreditHoursEarned() {
        return creditHoursEarned;
}
public void setCreditHoursEarned(int creditHoursEarned) {
        this.creditHoursEarned = creditHoursEarned;
}
public int getPointsEarned() {
        return pointsEarned;
}
public void setPointsEarned(int pointsEarned) {
        this.pointsEarned = pointsEarned;
}
public double calculateGpa() {
        double gradePointAverage = (double)pointsEarned / creditHoursEarned;
        return gradePointAverage;
}
public String toString() {
        return "Student --"+
        "Id Number: " + idNumber+
        ", Credit Hours Earned: " + creditHoursEarned+
        ", Points Earned: " + pointsEarned;
}    
        }

当我尝试在Netbeans IDE 7.4中运行它时，我得到一个错误：

---

student.student类未在学生项目中找到

这很可能与您的打包结构有关，请创建名为

student

的新包并在其中保存该类，或者尝试删除

包student。
显示尝试使用此类的main（）方法。另外，请注意，如果您的类位于不同的包中，则必须使用导入语句。我尝试删除包student，但错误仍然存在。您从何处使用
student
类？这是我为项目编写的三个系列代码中的第一个，我使用的是NetbeansAh，那么你已经得到了这个代码，你正在尝试运行它？在这种情况下，您可能没有正确设置项目。在学生项目中找不到student.student类