java学生信息管理系统

Java学生信息管理系统可以实现对学生信息的增、删、改、查等操作。下面是一个简单的示例：

1. 创建一个学生类，包括姓名、学号、性别、年龄等属性。

public class Student {
    private String name;
    private String id;
    private String gender;
    private int age;
    
    // 构造方法
    public Student(String name, String id, String gender, int age) {
        this.name = name;
        this.id = id;
        this.gender = gender;
        this.age = age;
    }
    
    // getter、setter方法
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public String getId() {
        return id;
    }
    
    public void setId(String id) {
        this.id = id;
    }
    
    public String getGender() {
        return gender;
    }
    
    public void setGender(String gender) {
        this.gender = gender;
    }
    
    public int getAge() {
        return age;
    }
    
    public void setAge(int age) {
        this.age = age;
    }
}

2. 创建一个学生信息管理类，包括添加、删除、修改、查询等方法。

import java.util.ArrayList;

public class StudentManage {
    private ArrayList<Student> list;
    
    // 构造方法
    public StudentManage() {
        list = new ArrayList<Student>();
    }
    
    // 添加学生信息
    public void addStudent(Student student) {
        list.add(student);
    }
    
    // 删除学生信息
    public void deleteStudent(Student student) {
        list.remove(student);
    }
    
    // 修改学生信息
    public void updateStudent(Student student) {
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i).getId().equals(student.getId())) {
                list.set(i, student);
                break;
            }
        }
    }
    
    // 查询学生信息
    public Student findStudent(String id) {
        for (Student student : list) {
            if (student.getId().equals(id)) {
                return student;
            }
        }
        return null;
    }
}

3. 编写测试类，测试学生信息管理类的各个方法。

public class Test {
    public static void main(String[] args) {
        StudentManage sm = new StudentManage();
        
        // 添加学生信息
        sm.addStudent(new Student("张三", "1001", "男", 18));
        sm.addStudent(new Student("李四", "1002", "女", 19));
        sm.addStudent(new Student("王五", "1003", "男", 20));
        
        // 查询学生信息
        Student s1 = sm.findStudent("1002");
        System.out.println("查询学生信息：" + s1.getName() + " " + s1.getGender() + " " + s1.getAge());
        
        // 修改学生信息
        Student s2 = new Student("赵六", "1002", "男", 21);
        sm.updateStudent(s2);
        System.out.println("修改学生信息：" + s2.getName() + " " + s2.getGender() + " " + s2.getAge());
        
        // 删除学生信息
        sm.deleteStudent(s1);
        System.out.println("删除学生信息：" + s1.getName() + " " + s1.getGender() + " " + s1.getAge());
    }
}