【Java基础】 学生管理系统的简单实现

//Student.java

package learn.code;

import java.io.StreamCorruptedException;

public class Student {
    private String name;
    private  String studentId;
    private int age;
    private double score;

    public Student(String name,String studentId,int age,double score){
        this.name = name;
        this.studentId = studentId;
        this.age = age;
        this.score = score;
    }
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public String getStudentId(){
        return studentId;
    }
    public void setStudentId(String studentId){
        this.studentId = studentId;
    }
    public int getAge(){
        return age;
    }
    public void setAge(int age){
        this.age = age;
    }
    public double getScore(){
        return score;
    }
    public void setScore(double score){
        this.score = score;
    }
}

//Studentmanage.java

package learn.code;

import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;

public class Studentmanage {
    //存储学生信息的列表
    private List<Student> students;

    public Studentmanage(){
        students = new ArrayList<>();
    }

    //增加学生信息
    public void addStudent(Student student){
        students.add(student);
    }

    //根据学号删除学生信息
    public void removeStudent(String studentId){
        for (Student student : students ){
            //判断以下当前取出的学号与传入的是否一致
            if (student.getStudentId().equals(studentId)){
                //在列表中删除,双重释放
                students.remove(student);
                return;
            }
        }
    }

    //根据学号对学生信息进行修改
    public void updateStudent(String studentId,String name,int age,double score){
        for (Student student : students ){
            //判断以下当前取出的学号与传入的是否一致
            if (student.getStudentId().equals(studentId)){
                student.setAge(age);
                student.setName(name);
                student.setScore(score);
            }
        }
    }

    public Student queryStudent(String studentId){
        for (Student student : students ){
            //判断以下当前取出的学号与传入的是否一致
            if (student.getStudentId().equals(studentId)){
                return student;
            }
        }
        return null;
    }
}

//Main.java

package learn.code;

public class Main {
    public static void main(String[] args){
        //创建学生信息
        Student studentA = new Student("小李","001",18,94.3);
        Student studentB = new Student("小王","002",18,92.8);
        Student studentC = new Student("小张","003",17,95);
        Student studentD = new Student("小周","004",18,96);

        //学生管理类对象创建
        Studentmanage manage = new Studentmanage();

        //添加学生信息
        manage.addStudent(studentA);
        manage.addStudent(studentB);
        manage.addStudent(studentC);
        manage.addStudent(studentD);

        //查询学生信息
        Student queryResult = manage.queryStudent("003");
        System.out.println("查询结果：" + queryResult.getName() + "\t" + queryResult.getStudentId() + "\t" + queryResult.getAge() + "\t" + queryResult.getScore());

        //学生信息的修改
        manage.updateStudent("小草","003", 16,99);

        //删除学生信息
        manage.removeStudent("002");
    }
}