如何设计满足下列条件的程序

创建有学生类，包含学生的基本信息。以随机的方式来查找某个学生的信息并把它显示出来以实现点名。程序能够读取该存盘文件并把相应的学生信息读入内存，然后以随机的方式来查找某个学生的信息并把它显示出来以实现点名。

public class Student {
    private String name;
    private int id;
    private String gender;
    private int age;
    
    public Student(String name, int id, String gender, int age) {
        this.name = name;
        this.id = id;
        this.gender = gender;
        this.age = age;
    }
    
    // 以下为get和set方法
    public String getName() {
        return name;
    }
    
    public void setName(String name) {
        this.name = name;
    }
    
    public int getId() {
        return id;
    }
    
    public void setId(int 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;
    }
}
public class Main {
    private static final String FILE_NAME = "students.txt";
    
    public static void main(String[] args) {
        // 构建学生信息
        Student[] students = initStudents();
        
        // 写入学生信息到文件
        writeFile(students);
        
        // 随机读取一个学生信息并显示
        readRandomStudent();
    }
    
    // 初始化学生信息
    private static Student[] initStudents() {
        Student[] students = new Student[10];
        students[0] = new Student("张三", 1001, "男", 18);
        students[1] = new Student("李四", 1002, "男", 19);
        students[2] = new Student("王五", 1003, "男", 20);
        students[3] = new Student("赵六", 1004, "男", 21);
        students[4] = new Student("张四", 1005, "女", 22);
        students[5] = new Student("李五", 1006, "女", 23);
        students[6] = new Student("王六", 1007, "女", 24);
        students[7] = new Student("赵七", 1008, "女", 25);
        students[8] = new Student("张五", 1009, "男", 26);
        students[9] = new Student("李六", 1010, "女", 27);
        return students;
    }
    
    // 写入学生信息到文件
    private static void writeFile(Student[] students) {
        try (BufferedWriter writer = new BufferedWriter(new FileWriter(FILE_NAME))) {
            for (int i = 0; i < students.length; i++) {
                writer.write(students[i].getName() + "," + students[i].getId() + "," 
                    + students[i].getGender() + "," + students[i].getAge() + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    // 从文件中随机读取一个学生信息并显示
    private static void readRandomStudent() {
        try (BufferedReader reader = new BufferedReader(new FileReader(FILE_NAME))) {
            // 先计算一下文件中一共有多少行数据
            int lineCount = 0;
            String line;
            while ((line = reader.readLine()) != null) {
                if (!line.equals("")) {
                    lineCount++;
                }
            }
            
            // 随机生成一个行数
            int randomLineNum = (int) (Math.random() * lineCount);
            if (randomLineNum == 0) {
                randomLineNum++;
            }
            
            // 找到随机生成的行数对应的学生信息
            int currentLineNum = 0;
            reader.mark(1024);
            while ((line = reader.readLine()) != null) {
                if (!line.equals("")) {
                    currentLineNum++;
                    if (currentLineNum == randomLineNum) {
                        String[] values = line.split(",");
                        System.out.println(
                            "姓名：" + values[0] + "，学号：" + values[1] + "，性别：" + values[2] + "，年龄：" + values[3]);
                        break;
                    }
                }
            }
        } catch (IOException e) {
            System.err.println("文件读写出错：" + e.getMessage());
            e.printStackTrace();
        }
    }
}

以下是用Java实现的示例代码：

import java.util.*;
import java.io.*;

class Main {
    public static void main(String[] args) throws Exception {
        Random rand = new Random();
        Scanner in = new Scanner(new File("students.txt"));

        List<Student> students = new ArrayList<>();
        while (in.hasNext()) {
            String line = in.nextLine();
            String[] fields = line.split(" ");
            Student student = new Student(fields[0], Integer.parseInt(fields[1]), fields[2], Integer.parseInt(fields[3]));
            students.add(student);
        }
        in.close();

        int index = rand.nextInt(students.size());
        Student selected = students.get(index);
        System.out.println("点名结果：姓名：" + selected.getName() + "，年龄：" + selected.getAge() + "，性别：" + selected.getGender() + "，成绩：" + selected.getGrade());
    }
}

class Student {
    private String name; // 学生姓名
    private int age; // 学生年龄
    private String gender; // 学生性别
    private int grade; // 学生成绩

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

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }

    public String getGender() {
        return gender;
    }

    public int getGrade() {
        return grade;
    }
}

该程序使用了Java的面向对象特性，定义了一个Student类表示学生的信息。在main函数中，我们使用Scanner类从文件students.txt中读入学生信息，并将其保存在List类型的students中。然后使用Random类生成一个随机数，根据随机数选择一个学生信息，并输出到屏幕上。

需要注意的是，学生信息存储的格式应该与程序中读取的格式保持一致，通常可以将不同的信息用空格或其他特定字符分隔。另外，由于可能存在文件读取异常，因此我们使用了异常处理语句throws Exception在程序中进行捕获和处理。