用java实现编写 一个学生类student,包含的属性有学号、姓名、性别、年龄等,将所有学生存储在一一个数组中,编写学生管理程序实现如下操作: (1)增加一个学生; (2)根据学号删除某个学生; (3)将所有学生年龄增加一岁; (4)按数组中顺序显示所有学生信息; (5)将所有学生按姓名排序输出。

public class Student implements Comparable<Student> {
    private String id; // 学号
    private String name; // 姓名
    private String gender; // 性别
    private int age; // 年龄

    public Student(String id, String name, String gender, int age) {
        this.id = id;
        this.name = name;
        this.gender = gender;
        this.age = age;
    }

    public String getId() {
        return id;
    }

    public String getName() {
        return name;
    }

    public String getGender() {
        return gender;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public int compareTo(Student o) {
        return name.compareTo(o.getName());
    }

    @Override
    public String toString() {
        return "学号：" + id + "\t姓名：" + name + "\t性别：" + gender + "\t年龄：" + age;
    }
}

import java.util.Arrays;
import java.util.Scanner;

public class StudentManager {
    private static final int MAX_SIZE = 100; // 学生数组最大容量
    private Student[] students; // 学生数组
    private int size; // 学生数组中已有学生的数量

    public StudentManager() {
        students = new Student[MAX_SIZE];
        size = 0;
    }

    /**
     * 增加一个学生
     */
    public void addStudent() {
        if (size >= MAX_SIZE) {
            System.out.println("学生数量已达到最大值，无法添加！");
            return;
        }

        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入学号：");
        String id = scanner.next();
        System.out.print("请输入姓名：");
        String name = scanner.next();
        System.out.print("请输入性别：");
        String gender = scanner.next();
        System.out.print("请输入年龄：");
        int age = scanner.nextInt();

        Student student = new Student(id, name, gender, age);
        students[size] = student;
        size++;

        System.out.println("添加成功！");
    }

    /**
     * 根据学号删除某个学生
     */
    public void deleteStudent() {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要删除的学生的学号：");
        String id = scanner.next();

        int index = -1;
        for (int i = 0; i < size; i++) {
            if (students[i].getId().equals(id)) {
                index = i;
                break;
            }
        }

        if (index == -1) {
            System.out.println("没有找到该学生！");
            return;
        }

        for (int i = index; i < size - 1; i++) {
            students[i] = students[i + 1];
        }
        size--;

        System.out.println("删除成功！");
    }

    /**
     * 将所有学生年龄增加一岁
     */
    public void addAge() {
        for (int i = 0; i < size; i++) {
            students[i].setAge(students[i].getAge() + 1);
        }

        System.out.println("所有学生年龄增加成功！");
    }

    /**
     * 按数组中顺序显示所有学生信息
     */
    public void showStudents() {
        if (size == 0) {
            System.out.println("当前没有学生！");
            return;
        }

        for (int i = 0; i < size; i++) {
            System.out.println(students[i]);
        }
    }

    /**
     * 将所有学生按姓名排序输出
     */
    public void sortStudents() {
        if (size == 0) {
            System.out.println("当前没有学生！");
            return;
        }

        Arrays.sort(students, 0, size);

        System.out.println("按姓名排序输出所有学生信息：");
        for (int i = 0; i < size; i++) {
            System.out.println(students[i]);
        }
    }
}

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        StudentManager manager = new StudentManager();
        Scanner scanner = new Scanner(System.in);

        while (true) {
            System.out.println("*************学生管理系统*************");
            System.out.println("1. 增加一个学生");
            System.out.println("2. 根据学号删除某个学生");
            System.out.println("3. 将所有学生年龄增加一岁");
            System.out.println("4. 按数组中顺序显示所有学生信息");
            System.out.println("5. 将所有学生按姓名排序输出");
            System.out.println("0. 退出系统");
            System.out.println("**************************************");

            System.out.print("请输入操作编号：");
            int choice = scanner.nextInt();

            switch (choice) {
                case 0:
                    System.out.println("感谢使用学生管理系统，再见！");
                    return;
                case 1:
                    manager.addStudent();
                    break;
                case 2:
                    manager.deleteStudent();
                    break;
                case 3:
                    manager.addAge();
                    break;
                case 4:
                    manager.showStudents();
                    break;
                case 5:
                    manager.sortStudents();
                    break;
                default:
                    System.out.println("无效操作，请重新输入！");
                    break;
            }
        }
    }
}