Prompt Title: Java 学生管理系统

好的，我来给您提供一个简单的Java学生管理系统代码示例。

首先，我们需要创建一个Student类，用来存储学生的信息，包括姓名、年龄、性别和成绩等属性：

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

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

    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 double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", age=" + age +
                ", gender='" + gender + '\'' +
                ", score=" + score +
                '}';
    }
}

然后，我们需要创建一个管理学生的类，可以实现添加学生、删除学生、修改学生信息和查找学生等功能。这里我们使用List来存储学生的信息：

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

public class StudentManager {
    private List<Student> students = new ArrayList<>();

    public void addStudent(Student student) {
        students.add(student);
        System.out.println("添加成功！");
    }

    public void removeStudent(String name) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getName().equals(name)) {
                students.remove(i);
                System.out.println("删除成功！");
                return;
            }
        }
        System.out.println("没有找到该学生！");
    }

    public void updateStudent(Student student) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getName().equals(student.getName())) {
                students.set(i, student);
                System.out.println("修改成功！");
                return;
            }
        }
        System.out.println("没有找到该学生！");
    }

    public void searchStudent(String name) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getName().equals(name)) {
                System.out.println(students.get(i));
                return;
            }
        }
        System.out.println("没有找到该学生！");
    }

    public void displayStudents() {
        for (int i = 0; i < students.size(); i++) {
            System.out.println(students.get(i));
        }
    }

    public static void main(String[] args) {
        StudentManager manager = new StudentManager();
        Scanner scanner = new Scanner(System.in);
        while (true) {
            System.out.println("请选择要进行的操作：");
            System.out.println("1. 添加学生");
            System.out.println("2. 删除学生");
            System.out.println("3. 修改学生信息");
            System.out.println("4. 查找学生");
            System.out.println("5. 显示所有学生