用JAVA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﹔ 将所有学生按姓名排序输出。

public class Student implements Comparable<Student>{
    private int id;
    private String name;
    private String gender;
    private int age;

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

    public int 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());
    }
}

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

public class StudentManager {
    private static Scanner sc = new Scanner(System.in);

    private static Student[] students = new Student[10];
    private static int size = 0;

    public static void main(String[] args) {
        while (true) {
            System.out.println("请选择要进行的操作：");
            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. 退出程序");

            int choice = sc.nextInt();
            switch (choice) {
                case 1:
                    addStudent();
                    break;
                case 2:
                    deleteStudent();
                    break;
                case 3:
                    addOneYear();
                    break;
                case 4:
                    showStudents();
                    break;
                case 5:
                    sortStudents();
                    break;
                case 0:
                    System.exit(0);
                default:
                    System.out.println("无效选项，请重新选择");
                    break;
            }
        }
    }

    private static void addStudent() {
        if (size == students.length) {
            System.out.println("学生数组已满，无法继续添加");
            return;
        }

        System.out.println("请输入学生信息：");
        System.out.println("学号：");
        int id = sc.nextInt();
        System.out.println("姓名：");
        String name = sc.next();
        System.out.println("性别：");
        String gender = sc.next();
        System.out.println("年龄：");
        int age = sc.nextInt();

        students[size++] = new Student(id, name, gender, age);
        System.out.println("学生添加成功");
    }

    private static void deleteStudent() {
        System.out.println("请输入要删除的学生的学号：");
        int id = sc.nextInt();

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

        if (index == -1) {
            System.out.println("学号为" + id + "的学生不存在");
            return;
        }

        for (int i = index; i < size - 1; i++) {
            students[i] = students[i + 1];
        }
        students[--size] = null;
        System.out.println("学生删除成功");
    }

    private static void addOneYear() {
        for (int i = 0; i < size; i++) {
            students[i].setAge(students[i].getAge() + 1);
        }
        System.out.println("所有学生年龄增加一岁成功");
    }

    private static void showStudents() {
        System.out.println("学生列表：");
        for (int i = 0; i < size; i++) {
            System.out.println(students[i].getId() + "\t" + students[i].getName() + "\t" + students[i].getGender() + "\t" + students[i].getAge());
        }
    }

    private static void sortStudents() {
        Arrays.sort(students, 0, size);
        System.out.println("按姓名排序后的学生列表：");
        for (int i = 0; i < size; i++) {
            System.out.println(students[i].getId() + "\t" + students[i].getName() + "\t" + students[i].getGender() + "\t" + students[i].getAge());
        }
    }
}