一个简单的学生管理系统Java代码
时间: 2023-08-06 13:05:24 浏览: 39
以下是一个简单的学生管理系统 Java 代码示例:
```java
import java.util.ArrayList;
import java.util.Scanner;
public class StudentManagementSystem {
public static void main(String[] args) {
ArrayList<Student> students = new ArrayList<>();
Scanner scanner = new Scanner(System.in);
while (true) {
System.out.println("欢迎使用学生管理系统,请输入操作编号:");
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. 查询学生信息");
System.out.println("5. 退出系统");
int operation = scanner.nextInt();
switch (operation) {
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(男/女):");
String gender = scanner.next();
Student student = new Student(name, age, gender);
students.add(student);
System.out.println("添加成功!");
break;
case 2:
System.out.println("请输入要删除的学生姓名:");
String deleteName = scanner.next();
boolean flag = false;
for (int i = 0; i < students.size(); i++) {
if (students.get(i).getName().equals(deleteName)) {
students.remove(i);
flag = true;
System.out.println("删除成功!");
break;
}
}
if (!flag) {
System.out.println("未找到该学生!");
}
break;
case 3:
System.out.println("请输入要修改的学生姓名:");
String modifyName = scanner.next();
boolean modifyFlag = false;
for (int i = 0; i < students.size(); i++) {
if (students.get(i).getName().equals(modifyName)) {
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(男/女):");
String newGender = scanner.next();
students.get(i).setName(newName);
students.get(i).setAge(newAge);
students.get(i).setGender(newGender);
modifyFlag = true;
System.out.println("修改成功!");
break;
}
}
if (!modifyFlag) {
System.out.println("未找到该学生!");
}
break;
case 4:
System.out.println("请输入要查询的学生姓名:");
String queryName = scanner.next();
boolean queryFlag = false;
for (int i = 0; i < students.size(); i++) {
if (students.get(i).getName().equals(queryName)) {
System.out.println("查询结果:");
System.out.println(students.get(i));
queryFlag = true;
break;
}
}
if (!queryFlag) {
System.out.println("未找到该学生!");
}
break;
case 5:
System.out.println("感谢使用学生管理系统,再见!");
System.exit(0);
break;
default:
System.out.println("输入的操作编号不正确,请重新输入!");
break;
}
}
}
}
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 "学生信息:姓名:" + name + ",年龄:" + age + ",性别:" + gender;
}
}
```
这个学生管理系统支持添加、删除、修改和查询学生信息,并且使用了 ArrayList 来存储学生信息。用户可以通过输入操作编号来选择需要执行的操作。