Java代码实现学生管理系统，学生信息包括学号，姓名，年龄，语文成绩，数学成绩，英语成绩，总分，性别，班级，支持对成绩的增删改查

以下是 Java 代码实现学生管理系统的一种示例：

import java.util.ArrayList;
import java.util.Scanner;

class Student {
    private int id;
    private String name;
    private int age;
    private double chinese;
    private double math;
    private double english;
    private double total;
    private String gender;
    private String className;
    
    public Student(int id, String name, int age, double chinese, double math, double english, String gender, String className) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.chinese = chinese;
        this.math = math;
        this.english = english;
        this.total = chinese + math + english;
        this.gender = gender;
        this.className = className;
    }
    
    public int getId() {
        return id;
    }
    
    public String getName() {
        return name;
    }
    
    public int getAge() {
        return age;
    }
    
    public double getChinese() {
        return chinese;
    }
    
    public double getMath() {
        return math;
    }
    
    public double getEnglish() {
        return english;
    }
    
    public double getTotal() {
        return total;
    }
    
    public String getGender() {
        return gender;
    }
    
    public String getClassName() {
        return className;
    }
    
    public void setChinese(double chinese) {
        this.chinese = chinese;
        this.total = this.chinese + this.math + this.english;
    }
    
    public void setMath(double math) {
        this.math = math;
        this.total = this.chinese + this.math + this.english;
    }
    
    public void setEnglish(double english) {
        this.english = english;
        this.total = this.chinese + this.math + this.english;
    }
    
    @Override
    public String toString() {
        return "学号: " + id +
               "\n姓名: " + name +
               "\n年龄: " + age +
               "\n语文成绩: " + chinese +
               "\n数学成绩: " + math +
               "\n英语成绩: " + english +
               "\n总分: " + total +
               "\n性别: " + gender +
               "\n班级: " + className;
    }
}

public class StudentManager {
    private static ArrayList<Student> students = new ArrayList<>();
    
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        while (true) {
            System.out.println("1.