使用JAVA做出简单的学生信息管理系统的代码程序

以下是一个简单的学生信息管理系统的Java代码程序：

import java.util.Scanner;

public class StudentManagementSystem {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Student[] students = new Student[100];
        int count = 0;
        
        while (true) {
            System.out.println("\n请选择操作：");
            System.out.println("1. 添加学生信息");
            System.out.println("2. 查找学生信息");
            System.out.println("3. 修改学生信息");
            System.out.println("4. 删除学生信息");
            System.out.println("5. 显示所有学生信息");
            System.out.println("6. 退出系统");
            System.out.print("请输入数字：");
            int choice = scanner.nextInt();
            
            switch (choice) {
                case 1:
                    System.out.print("请输入学生姓名：");
                    String name = scanner.next();
                    System.out.print("请输入学生年龄：");
                    int age = scanner.nextInt();
                    System.out.print("请输入学生性别（男/女）：");
                    String gender = scanner.next();
                    System.out.print("请输入学生班级：");
                    String className = scanner.next();
                    students[count] = new Student(name, age, gender, className);
                    count++;
                    System.out.println("添加成功！");
                    break;
                    
                case 2:
                    System.out.print("请输入要查找的学生姓名：");
                    String searchName = scanner.next();
                    boolean found = false;
                    for (int i = 0; i < count; i++) {
                        if (students[i].getName().equals(searchName)) {
                            System.out.println("学生信息如下：");
                            System.out.println(students[i]);
                            found = true;
                            break;
                        }
                    }
                    if (!found) {
                        System.out.println("未找到该学生的信息！");
                    }
                    break;
                    
                case 3:
                    System.out.print("请输入要修改的学生姓名：");
                    String modifyName = scanner.next();
                    boolean modified = false;
                    for (int i = 0; i < count; i++) {
                        if (students[i].getName().equals(modifyName)) {
                            System.out.print("请输入修改后的学生年龄：");
                            int modifyAge = scanner.nextInt();
                            System.out.print("请输入修改后的学生性别（男/女）：");
                            String modifyGender = scanner.next();
                            System.out.print("请输入修改后的学生班级：");
                            String modifyClassName = scanner.next();
                            students[i].setAge(modifyAge);
                            students[i].setGender(modifyGender);
                            students[i].setClassName(modifyClassName);
                            modified = true;
                            System.out.println("修改成功！");
                            break;
                        }
                    }
                    if (!modified) {
                        System.out.println("未找到该学生的信息！");
                    }
                    break;
                    
                case 4:
                    System.out.print("请输入要删除的学生姓名：");
                    String deleteName = scanner.next();
                    boolean deleted = false;
                    for (int i = 0; i < count; i++) {
                        if (students[i].getName().equals(deleteName)) {
                            for (int j = i; j < count - 1; j++) {
                                students[j] = students[j + 1];
                            }
                            count--;
                            deleted = true;
                            System.out.println("删除成功！");
                            break;
                        }
                    }
                    if (!deleted) {
                        System.out.println("未找到该学生的信息！");
                    }
                    break;
                    
                case 5:
                    if (count == 0) {
                        System.out.println("暂无学生信息！");
                    } else {
                        System.out.println("所有学生信息如下：");
                        for (int i = 0; i < count; i++) {
                            System.out.println(students[i]);
                        }
                    }
                    break;
                    
                case 6:
                    System.out.println("感谢使用学生信息管理系统，再见！");
                    System.exit(0);
                    
                default:
                    System.out.println("请选择正确的操作！");
            }
        }
    }
}

class Student {
    private String name;
    private int age;
    private String gender;
    private String className;
    
    public Student(String name, int age, String gender, String className) {
        this.name = name;
        this.age = age;
        this.gender = gender;
        this.className = className;
    }
    
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public int getAge() {
        return age;
    }
    
    public void setAge(int age) {
        this.age = age;
    }
    
    public String getGender() {
        return gender;
    }
    
    public void setGender(String gender) {
        this.gender = gender;
    }
    
    public String getClassName() {
        return className;
    }
    
    public void setClassName(String className) {
        this.className = className;
    }
    
    public String toString() {
        return "姓名：" + name + "，年龄：" + age + "，性别：" + gender + "，班级：" + className;
    }
}

这个程序实现了添加、查找、修改、删除和显示学生信息的功能。你可以根据自己的需要进行修改和优化。