java - 从数组返回类类型

我在这里的getTopStudent方法中有一个叫做Classrooms的类，这是说我的变量“ topStudent”尚未初始化，我缺少什么了吗，不是所有内容都在我的AP Java课程的视频中进行了解释。

public class Classroom
{
    Student[] students;
    int numStudentsAdded;

    public Classroom(int numStudents)
    {
        students = new Student[numStudents];
        numStudentsAdded = 0;
    }

    public Student getTopStudent()
    {
        Student topStudent;
        for(int i = 1; i < students.length; i++)
        {

            if(students[i].getAverageScore() > students[i - 1].getAverageScore())
            {
                topStudent = students[i];
            }
            else
            {
                topStudent = students[i - 1];
            }

        }
        return topStudent;
    }

    public void addStudent(Student s)
    {
        students[numStudentsAdded] = s;
        numStudentsAdded++;
    }

    public void printStudents()
    {
        for(int i = 0; i < numStudentsAdded; i++)
        {
            System.out.println(students[i]);
        }
    }
}

我的学生班都在上课，应该没错，不要以为解决这个问题就可以了。

测试人员：

public class ClassroomTester extends ConsoleProgram
{
    public void run()
    {
        Classroom c = new Classroom(2);

        Student ada = new Student("Ada", "Lovelace", 12);
        ada.addExamScore(44);
        ada.addExamScore(65);
        ada.addExamScore(77);

        Student alan = new Student("Alan", "Turing", 11);
        alan.addExamScore(38);
        alan.addExamScore(24);
        alan.addExamScore(31);

        // add students to classroom
        c.addStudent(ada);
        c.addStudent(alan);
        c.printStudents();

        Student topStudent = c.getTopStudent();
        System.out.println(topStudent);
    }
}

最佳答案

它应该抱怨，因为如果getTopStudent()中的for循环永不运行，则topStudent将保持未初始化状态。使用Student topStudent = null