用java如何写学生管理系统
时间: 2023-05-30 12:02:37 浏览: 43
以下是一种基本的学生管理系统的Java代码示例:
```
import java.util.Scanner;
public class StudentManagementSystem {
private static final int MAX_STUDENTS = 100;
private Student[] students;
private int numStudents;
public StudentManagementSystem() {
students = new Student[MAX_STUDENTS];
numStudents = 0;
}
public void addStudent(Student student) {
students[numStudents] = student;
numStudents++;
}
public void removeStudent(int studentID) {
for (int i = 0; i < numStudents; i++) {
if (students[i].getID() == studentID) {
students[i] = null;
for (int j = i; j < numStudents - 1; j++) {
students[j] = students[j + 1];
}
numStudents--;
break;
}
}
}
public void printAllStudents() {
for (int i = 0; i < numStudents; i++) {
System.out.println(students[i]);
}
}
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
StudentManagementSystem system = new StudentManagementSystem();
boolean done = false;
while (!done) {
System.out.println("Enter 1 to add a student");
System.out.println("Enter 2 to remove a student");
System.out.println("Enter 3 to print all students");
System.out.println("Enter 4 to quit");
int choice = input.nextInt();
switch (choice) {
case 1:
System.out.println("Enter student ID:");
int id = input.nextInt();
System.out.println("Enter student name:");
String name = input.next();
Student student = new Student(id, name);
system.addStudent(student);
System.out.println("Student added.");
break;
case 2:
System.out.println("Enter student ID to remove:");
int idToRemove = input.nextInt();
system.removeStudent(idToRemove);
System.out.println("Student removed.");
break;
case 3:
system.printAllStudents();
break;
case 4:
done = true;
break;
default:
System.out.println("Invalid choice.");
break;
}
}
}
}
class Student {
private int id;
private String name;
public Student(int id, String name) {
this.id = id;
this.name = name;
}
public int getID() {
return id;
}
public String getName() {
return name;
}
public String toString() {
return "ID: " + id + ", Name: " + name;
}
}
```
该代码示例定义了一个`StudentManagementSystem`类,其中包含一个`Student`对象数组,可以添加、删除和打印所有学生。`Student`类表示单个学生,具有ID和姓名属性。主方法使用控制台输入来与用户交互,允许用户执行上述操作。