java - 无法为类实现测试程序

Question

这是一个家庭作业，也是我的第一个 Java 程序。我写了一个 StudentAverage 类，现在我想测试类方法，但是当我写我的测试程序时，IDE 告诉我我不能声明我的主要静态。我使用 Eclipse 作为我的 IDE。

由于这是一项家庭作业，而且我仍在学习 Java，因此我也希望得到一些关于我做错了什么的指导。

这是我的代码:

/**
 *Program:      StudentAverage, Calculate the student average quizzes taken
 * @author:     Jose Mazorra
 * Date:        July 11, 2013
 * Class:       CIS406
 */

/**
   A student who is taking quizzes.
*/
public class StudentAverage
{ 
    //Instances variables
    private String name;
    private double quizScores;
    private double numOfQuizzesTaken;

   /**
      Constructs a student with a given name.
      @param n the name
   */
   public StudentAverage(String stuName)
   {  
     name = (stuName);
   }

   /**
      Gets the name of this student.
      @return the name
   */
   public String getName()
   {  
     return name;
   }

   /**
      Adds a quiz score.
      @param score the score to add
   */
   public void addQuiz(int score)
   {  
     numOfQuizzesTaken++;
     quizScores = quizScores + score;
   }


   /**
      Gets the sum of all quiz scores.
      @return the total score
   */
   public double getTotalScore()
   {  
     return quizScores;
   }

/**Returns the average of all quiz taken
 * by the student
 * @return average score
 */

public double getAverageScore(){

double avgScore;

avgScore = (quizScores / numOfQuizzesTaken);

return avgScore;

}

public class StudentAverageTester{

    public static void main(String[] args){

        StudentAverage student = new StudentAverage()

        student.name("Jose");
        student.numOfQuizzesTaken(10);
        student.quizScores(400);

        double avg = student.avgScore();

        System.out.println(name);
        System.out.println(avg);
        System.out.println("Expected 40");



    }


}

}

Answer 1

您已将 StudentAverageTester 创建为 StudentAverage 的非静态内部类。非静态内部类不允许有 static 声明，这就是您看到编译错误的原因(请参阅 JLS 8.1.3)。

如果您将 StudentAverageTester 类提取到它自己的 StudentAverageTester.java 文件中，那真的会更好。