How to write a simple student performance report generator using Java?

How to write a simple student performance report generator using Java?

The Student Performance Report Generator is a tool that can help teachers or educators quickly generate student performance reports. This article will introduce how to use Java to write a simple student performance report generator.

First, we need to define the student object and student grade object. The student object contains basic information such as the student's name and student number, while the student score object contains information such as the student's subject scores and average grade. The following is the definition of a simple student object:

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;
    }
}

Next, we need to define the data structure of the grade record. Here we use a HashMap to save student score records, where the key is the student object and the value is the score object. The following is the definition of a simple grade object:

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

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

    public double getMathGrade() {
        return mathGrade;
    }

    public double getEnglishGrade() {
        return englishGrade;
    }
}

Next, we can use an ArrayList to save the grade records of all students. The following is the implementation of a simple student score report generator:

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("学生姓名：" + student.getName());
            System.out.println("学号：" + student.getStudentId());
            System.out.println("数学成绩：" + grade.getMathGrade());
            System.out.println("英语成绩：" + grade.getEnglishGrade());
            System.out.println("平均成绩：" + averageGrade);
            System.out.println("--------------------------");
        }
    }
}

Using this student score report generator, we can easily add student score records and generate a simple score report. The following is an example of how to use it:

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

        Student student1 = new Student("张三", "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();
    }
}

The above code will generate the following score report:

学生姓名：张三
学号：2021001
数学成绩：94.5
英语成绩：88.0
平均成绩：91.25
--------------------------
学生姓名：李四
学号：2021002
数学成绩：87.0
英语成绩：78.5
平均成绩：82.75
--------------------------

Through this simple example, we can see how to use Java to write a simple student score Report generator. You can extend this generator as needed to accommodate more complex requirements. Hope this article helps you!

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