Java? ???? ??? ?? ?? ??? ???? ???? ??? ??????

?? ?? ??? ???? ??? ???? ?? ?? ???? ???? ???? ? ??? ?? ?????. ? ????? Java? ???? ??? ?? ?? ??? ???? ???? ??? ?????.

?? ?? ??? ?? ?? ??? ???? ???. ?? ???? ??? ??, ?? ?? ?? ??? ????, ?? ?? ???? ??? ?? ??, ?? ?? ?? ??? ?????. ??? ??? ?? ??? ?????.

public class Student {
    private String name;
    private String studentId;

    public Student(String name, String studentId) {
        this.name = name;
        this.studentId = studentId;
    }

    public String getName() {
        return name;
    }

    public String getStudentId() {
        return studentId;
    }
}

???? ?? ??? ??? ??? ???? ???. ???? HashMap? ???? ?? ?? ???? ?????. ??? ?? ?? ???? ?? ?? ?????. ??? ??? ?? ??? ?????.

public class Grade {
    private double mathGrade;
    private double englishGrade;
    // 可以按需增加其他科目的成績

    public Grade(double mathGrade, double englishGrade) {
        this.mathGrade = mathGrade;
        this.englishGrade = englishGrade;
    }

    public double getMathGrade() {
        return mathGrade;
    }

    public double getEnglishGrade() {
        return englishGrade;
    }
}

???? ArrayList? ???? ?? ??? ?? ??? ??? ? ????. ??? ??? ?? ?? ??? ???? ?????.

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

public class GradeReportGenerator {
    private ArrayList<Student> students;
    private HashMap<Student, Grade> studentGrades;

    public GradeReportGenerator() {
        students = new ArrayList<>();
        studentGrades = new HashMap<>();
    }

    public void addStudent(Student student, Grade grade) {
        students.add(student);
        studentGrades.put(student, grade);
    }

    public void generateReport() {
        for (Student student : students) {
            Grade grade = studentGrades.get(student);
            double averageGrade = (grade.getMathGrade() + grade.getEnglishGrade()) / 2;

            System.out.println("學生姓名：" + student.getName());
            System.out.println("學號：" + student.getStudentId());
            System.out.println("數(shù)學成績：" + grade.getMathGrade());
            System.out.println("英語成績：" + grade.getEnglishGrade());
            System.out.println("平均成績：" + averageGrade);
            System.out.println("--------------------------");
        }
    }
}

? ?? ?? ??? ???? ???? ?? ?? ?? ??? ???? ??? ?? ???? ??? ? ????. ??? ?? ??? ?? ????.

public class Main {
    public static void main(String[] args) {
        GradeReportGenerator generator = new GradeReportGenerator();

        Student student1 = new Student("張三", "2021001");
        Grade grade1 = new Grade(94.5, 88.0);
        generator.addStudent(student1, grade1);

        Student student2 = new Student("李四", "2021002");
        Grade grade2 = new Grade(87.0, 78.5);
        generator.addStudent(student2, grade2);

        generator.generateReport();
    }
}

? ??? ?? ?? ???? ?????.

學生姓名：張三
學號：2021001
數(shù)學成績：94.5
英語成績：88.0
平均成績：91.25
--------------------------
學生姓名：李四
學號：2021002
數(shù)學成績：87.0
英語成績：78.5
平均成績：82.75
--------------------------

? ??? ?? ?? Java? ???? ??? ?? ?? ??? ???? ???? ??? ? ? ????. ? ??? ?? ??? ???? ?? ??? ?? ? ???? ??? ? ????. ? ??? ??? ??? ????!

? ??? Java? ???? ??? ?? ?? ??? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!