修改学生信息Java

以下是修改学生信息的Java代码示例：

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

public class StudentManagementSystem {
    private ArrayList<Student> students;

    public StudentManagementSystem() {
        students = new ArrayList<Student>();
    }

    public void addStudent(Student student) {
        students.add(student);
    }

    public void removeStudent(Student student) {
        students.remove(student);
    }

    public void printStudents() {
        for (Student student : students) {
            System.out.println(student);
        }
    }

    public void updateStudent(Student student, String name, int age, String gender) {
        student.setName(name);
        student.setAge(age);
        student.setGender(gender);
    }

    public static void main(String[] args) {
        StudentManagementSystem system = new StudentManagementSystem();
        Scanner scanner = new Scanner(System.in);
        boolean running = true;

        while (running) {
            System.out.println("请选择操作：1.添加学生 2.删除学生 3.查看学生列表 4.修改学生信息 5.退出");
            int choice = scanner.nextInt();

            switch (choice) {
                case 1:
                    System.out.println("请输入学生姓名：");
                    String name = scanner.next();
                    System.out.println("请输入学生年龄：");
                    int age = scanner.nextInt();
                    System.out.println("请输入学生性别：");
                    String gender = scanner.next();
                    Student student = new Student(name, age, gender);
                    system.addStudent(student);
                    System.out.println("添加学生成功！");
                    break;
                case 2:
                    System.out.println("请输入要删除的学生姓名：");
                    String nameToRemove = scanner.next();
                    boolean removed = false;
                    for (Student s : system.students) {
                        if (s.getName().equals(nameToRemove)) {
                            system.removeStudent(s);
                            System.out.println("删除学生成功！");
                            removed = true;
                            break;
                        }
                    }
                    if (!removed) {
                        System.out.println("没有找到该学生！");
                    }
                    break;
                case 3:
                    system.printStudents();
                    break;
                case 4:
                    System.out.println("请输入要修改的学生姓名：");
                    String nameToUpdate = scanner.next();
                    boolean updated = false;
                    for (Student s : system.students) {
                        if (s.getName().equals(nameToUpdate)) {
                            System.out.println("请输入新的学生姓名：");
                            String newName = scanner.next();
                            System.out.println("请输入新的学生年龄：");
                            int newAge = scanner.nextInt();
                            System.out.println("请输入新的学生性别：");
                            String newGender = scanner.next();
                            system.updateStudent(s, newName, newAge, newGender);
                            System.out.println("修改学生信息成功！");
                            updated = true;
                            break;
                        }
                    }
                    if (!updated) {
                        System.out.println("没有找到该学生！");
                    }
                    break;
                case 5:
                    running = false;
                    break;
                default:
                    System.out.println("输入有误，请重新选择！");
                    break;
            }
        }

        System.out.println("学生信息管理系统已退出！");
    }
}

class Student {
    private String name;
    private int age;
    private String gender;

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

    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;
    }

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

该程序新增了一个 `updateStudent` 方法来更新学生信息。在控制台菜单中，新增了一个选项来选择修改学生信息，用户可以输入要修改的学生姓名，然后输入新的学生姓名、年龄和性别来更新学生信息。在 `Student` 类中，新增了三个 `set` 方法来设置学生的姓名、年龄和性别。