将若干个Student对象添加到List集合中，然后将List存储到txt文件中，再从 txt文件读取内容，并且打印List的完整代码

以下是将Student对象添加到List集合中，将List存储到txt文件中，再从txt文件读取内容并打印List的完整代码示例：

import java.io.*;
import java.util.ArrayList;
import java.util.List;

class Student {
    private String name;
    private int age;

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

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Student> studentList = new ArrayList<>();
        studentList.add(new Student("Alice", 18));
        studentList.add(new Student("Bob", 20));
        studentList.add(new Student("Charlie", 22));

        // 将List集合中的内容写入txt文件
        try {
            FileWriter fileWriter = new FileWriter("students.txt");
            BufferedWriter writer = new BufferedWriter(fileWriter);

            for (Student student : studentList) {
                writer.write(student.getName() + "," + student.getAge());
                writer.newLine();
            }

            writer.close();
            System.out.println("List已成功写入txt文件。");
        } catch (IOException e) {
            System.out.println("写入txt文件时出现错误：" + e.getMessage());
        }

        // 从txt文件中读取内容并打印List
        List<Student> newList = new ArrayList<>();

        try {
            FileReader fileReader = new FileReader("students.txt");
            BufferedReader reader = new BufferedReader(fileReader);
            String line;

            while ((line = reader.readLine()) != null) {
                String[] parts = line.split(",");
                String name = parts[0];
                int age = Integer.parseInt(parts[1]);

                Student student = new Student(name, age);
                newList.add(student);
            }

            reader.close();

            System.out.println("从txt文件中读取的List内容：");
            for (Student student : newList) {
                System.out.println("姓名：" + student.getName() + "，年龄：" + student.getAge());
            }
        } catch (IOException e) {
            System.out.println("读取txt文件时出现错误：" + e.getMessage());
        }
    }
}

您可以将以上代码保存为一个Java文件，然后运行它，即可实现将Student对象添加到List集合中，将List存储到txt文件中，并从txt文件读取内容并打印List。