JAVA编写一个学生信息管理系统

以下是一个简单的Java学生信息管理系统的示例代码：

```java

import java.util.ArrayList;

import java.util.Scanner;

class Student {

private String name;

private int age;

private String gender;

private String major;

public Student(String name, int age, String gender, String major) {

this.name = name;

this.age = age;

this.gender = gender;

this.major = major;

}

public String getName() {

return name;

}

public int getAge() {

return age;

}

public String getGender() {

return gender;

}

public String getMajor() {

return major;

}

}

public class StudentInfoManagementSystem {

private ArrayList students;

public StudentInfoManagementSystem() {

students = new ArrayList<>();

}

public void addStudent(Student student) {

students.add(student);

}

public void removeStudent(String name) {

students.removeIf(student -> student.getName().equals(name));

}

public void displayStudents() {

for (Student student : students) {

System.out.println("Name: " + student.getName() + ", Age: " + student.getAge() + ", Gender: " + student.getGender() + ", Major: " + student.getMajor());

}

}

public static void main(String[] args) {

StudentInfoManagementSystem system = new StudentInfoManagementSystem();

Scanner scanner = new Scanner(System.in);

while (true) {

System.out.println("1. Add student");

System.out.println("2. Remove student");

System.out.println("3. Display all students");

System.out.println("4. Exit");

System.out.print("Enter your choice: ");

int choice = scanner.nextInt();

scanner.nextLine(); // consume newline left-over

switch (choice) {

case 1:

System.out.print("Enter name, age, gender, and major: ");

String name = scanner.nextLine();

int age = scanner.nextInt();

String gender = scanner.nextLine();

String major = scanner.nextLine();

system.addStudent(new Student(name, age, gender, major));

break;

case 2:

System.out.print("Enter name to remove: ");

String nameToRemove = scanner.nextLine();

system.removeStudent(nameToRemove);

break;

case 3:

system.displayStudents();

break;

case 4:

System.out.println("Exiting...");

return;

default:

System.out.println("Invalid choice!");

}

}

}

}

```

这个示例代码实现了一个简单的学生信息管理系统，包括添加、删除和显示所有学生的功能。用户可以通过输入数字选择相应的操作。