如何计算含字符串与整数属性的对象数组的平均值及最高分？

你的代码存在两个核心问题：Student类的Getter方法逻辑错误，以及TestReporter中直接操作Student对象而非提取分数，下面一步步修正：

1. 修正Student类的Getter方法 #

你的getName和getScore方法带了不必要的参数，且getScore返回的是传入参数而非对象自身的score属性，这会导致无法正确获取学生分数。修改为无参的正确Getter：

public class Student {
    
    private String name;
    private int score;
    
    public Student() {
    }
    
    public Student(String name, int score){
        this.name = name;
        this.score = score;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public void setScore(int score) {
        this.score = score;
    }
    
    public void readInput() {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("Please enter the student's name: ");
        this.name = keyboard.next();
        System.out.println("Please enter the student's score: ");
        this.score = keyboard.nextInt();
    }
    
    public void writeOutput() {
        System.out.println("The student's name and score: " + name + ", " + score + "%");
    }
    
    // 修正：去掉参数，返回对象自身的name
    public String getName() {
        return this.name;
    }
    
    // 修正：去掉参数，返回对象自身的score
    public int getScore() {
        return this.score;
    }
}

2. 修正TestReporter的computeStats方法 #

现在可以通过getScore()方法从Student对象中提取分数，同时在遍历过程中计算总分、平均值和最高分：

import java.util.Scanner;

public class TestReporter {

    private int highestScore;
    private double averageScore;
    private Student[] ourClass; 
    private int numOfStudents;

    public TestReporter(){
    }

    public void getData() {
        Scanner keyboard = new Scanner(System.in);
        System.out.println("Please enter the number of students");
        numOfStudents = keyboard.nextInt();
        ourClass = new Student[numOfStudents];
        for (int i = 0; i < numOfStudents ; i++) {
            ourClass[i] = new Student(); 
            ourClass[i].readInput();
        }
    }

    public void computeStats() {
        if (numOfStudents == 0) {
            averageScore = 0;
            highestScore = 0;
            return;
        }
        
        double total = 0;
        // 初始化最高分为第一个学生的分数
        highestScore = ourClass[0].getScore();
        
        for (int i = 0; i < numOfStudents; i++) {
            int currentScore = ourClass[i].getScore();
            total += currentScore;
            
            // 更新最高分
            if (currentScore > highestScore) {
                highestScore = currentScore;
            }
        }
        averageScore = total / numOfStudents;
    }

    public void displayResults() {
        System.out.println("=== Student List ===");
        for (Student student: ourClass) {
            student.writeOutput();
        }
        System.out.println("\n=== Class Stats ===");
        System.out.println("Average Score: " + String.format("%.2f", averageScore) + "%");
        System.out.println("Highest Score: " + highestScore + "%");
    }
    
    // 测试用主方法
    public static void main(String[] args) {
        TestReporter reporter = new TestReporter();
        reporter.getData();
        reporter.computeStats();
        reporter.displayResults();
    }
}

关键修正点说明 #

• 通过ourClass[i].getScore()获取每个学生的分数，才能进行数值计算
• 初始化最高分后，遍历每个学生的分数进行比较更新
• 增加空数组判断，避免数组为空时出现异常
• 在displayResults中新增统计结果输出，让功能更完整

内容的提问来源于stack exchange，提问作者dumbkidincollege