使用Java写一份学生管理系统代码

好的，以下是一个简单的学生管理系统的Java代码示例：

Student类：

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

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

    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 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;
    }
}

StudentManagement类：

import java.util.ArrayList;

public class StudentManagement {
    private ArrayList<Student> students;

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

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

    public void removeStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                students.remove(student);
                break;
            }
        }
    }

    public void updateStudent(String id, Student newStudent) {
        for (int i = 0; i < students.size(); i++) {
            if (students.get(i).getId().equals(id)) {
                students.set(i, newStudent);
                break;
            }
        }
    }

    public Student findStudent(String id) {
        for (Student student : students) {
            if (student.getId().equals(id)) {
                return student;
            }
        }
        return null;
    }

    public ArrayList<Student> getStudents() {
        return students;
    }
}

StudentManagementTest类：

public class StudentManagementTest {
    public static void main(String[] args) {
        Student s1 = new Student("Tom", "1001", 20, "Male");
        Student s2 = new Student("Alice", "1002", 19, "Female");
        Student s3 = new Student("Bob", "1003", 21, "Male");

        StudentManagement sm = new StudentManagement();
        sm.addStudent(s1);
        sm.addStudent(s2);
        sm.addStudent(s3);

        System.out.println("All Students:");
        for (Student student : sm.getStudents()) {
            System.out.println(student.getName() + " " + student.getId() + " " + student.getAge() + " " + student.getGender());
        }

        System.out.println("\nAfter removing student with id 1002:");
        sm.removeStudent("1002");
        for (Student student : sm.getStudents()) {
            System.out.println(student.getName() + " " + student.getId() + " " + student.getAge() + " " + student.getGender());
        }

        System.out.println("\nAfter updating student with id 1003:");
        Student newStudent = new Student("Bob", "1003", 22, "Male");
        sm.updateStudent("1003", newStudent);
        for (Student student : sm.getStudents()) {
            System.out.println(student.getName() + " " + student.getId() + " " + student.getAge() + " " + student.getGender());
        }

        System.out.println("\nFind student with id 1001:");
        Student student = sm.findStudent("1001");
        if (student != null) {
            System.out.println(student.getName() + " " + student.getId() + " " + student.getAge() + " " + student.getGender());
        } else {
            System.out.println("Student not found!");
        }
    }
}

这些代码实现了添加学生、删除学生、修改学生信息、查询学生信息等操作，可以通过StudentManagementTest类进行测试。在实际应用中，可以将这些功能与GUI界面进行结合，实现一个完整的学生管理系统。