How to implement a simple student course selection score query system in Java?

How to implement a simple student course selection score query system in Java?

With the continuous development of computer technology, the student course selection score query system has become an indispensable part of the management of colleges and universities. With the help of this system, students can easily check their course selection information and grades, and teachers can quickly and accurately manage students' course selection and grade information. So, in the Java programming language, how do we implement a simple student course selection score query system?

First, we need to determine the requirements of the system. A simple student course selection score query system includes the following basic functions:

1. Student information management: including operations such as adding student information, modifying student information, and deleting student information.
2. Course management: including operations such as adding course information, modifying course information, deleting course information, etc.
3. Score management: including operations such as entering student scores, modifying student scores, and querying student scores.
4. Query function: Provide students with the ability to query their course selection information and grades by student number or name.

Next, we start writing code. We can divide the entire system into three modules: student information module, course information module and grade management module.

The first is the student information module. We can define a class named Student, which contains the student's student number, name, gender, age and other information, as well as the corresponding getter and setter methods. At the same time, we can define a class called StudentManager to manage student information, including functions such as adding, modifying, and deleting student information.

import java.util.ArrayList;
import java.util.List;

public class Student {

private String studentId;
private String name;
private String gender;
private int age;

// getter and setter methods

// constructor

}

public class StudentManager {

private List<Student> students;

public void addStudent(Student student) {
    // 添加学生信息到students列表
}

public void updateStudent(Student student) {
    // 修改学生信息
}

public void deleteStudent(Student student) {
    // 删除学生信息
}

// 其他学生信息管理操作

}

Next is the course information module. We can define a class named Course, which contains the course number, name, credits and other information, as well as the corresponding getter and setter methods. Similarly, we can define a class named CourseManager to manage course information.

import java.util.ArrayList;
import java.util.List;

public class Course {

private String courseId;
private String name;
private int credit;

// getter and setter methods

// constructor

}

public class CourseManager {

private List<Course> courses;

public void addCourse(Course course) {
    // 添加课程信息到courses列表
}

public void updateCourse(Course course) {
    // 修改课程信息
}

public void deleteCourse(Course course) {
    // 删除课程信息
}

// 其他课程信息管理操作

}

The last is the performance management module. We can define a class named Score, which contains the student's student number, course number, grades and other information, as well as the corresponding getter and setter methods. Similarly, we can define a class named ScoreManager to manage score information.

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

public class Score {

private String studentId;
private String courseId;
private double score;

// getter and setter methods

// constructor

}

public class ScoreManager {

private Map<String, Double> scores;

public void addScore(Score score) {
    // 添加成绩信息到scores Map
}

public void updateScore(Score score) {
    // 修改成绩信息
}

public double getScore(String studentId, String courseId) {
    // 查询指定学生和课程的成绩
    return scores.get(studentId + "-" + courseId);
}

// 其他成绩管理操作

}

Finally, we can write a class named Main as the entry point of the program to test various functions of the system.

public class Main {

public static void main(String[] args) {
    // 测试代码
}

}

Through the above code implementation, we have successfully implemented a simple student course selection score query system. Of course, this is only the most basic function, and it can be expanded and optimized according to needs in actual applications. I hope the above explanation is helpful to everyone!

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