一个文件名为1.txt，里面有学生学号、姓名、成绩，写一个Java代码，用list读取该文件，通过输入该学生学号实现删去该学生信息

好的，以下是一个示例的Java代码，可以实现你的需求：

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class Student {
    private String studentId;
    private String name;
    private double score;

    public Student(String studentId, String name, double score) {
        this.studentId = studentId;
        this.name = name;
        this.score = score;
    }

    public String getStudentId() {
        return studentId;
    }

    public String getName() {
        return name;
    }

    public double getScore() {
        return score;
    }
}

public class Main {
    public static void main(String[] args) {
        List<Student> students = readStudentData("1.txt");

        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要删除的学生学号：");
        String inputStudentId = scanner.nextLine();

        boolean found = false;
        for (int i = 0; i < students.size(); i++) {
            Student student = students.get(i);
            if (student.getStudentId().equals(inputStudentId)) {
                students.remove(i);
                found = true;
                break;
            }
        }

        if (found) {
            System.out.println("成功删除学生信息。");
            saveStudentData(students, "1.txt");
        } else {
            System.out.println("找不到该学生信息。");
        }
    }

    public static List<Student> readStudentData(String filename) {
        List<Student> students = new ArrayList<>();

        try {
            File file = new File(filename);
            Scanner scanner = new Scanner(file);

            while (scanner.hasNextLine()) {
                String line = scanner.nextLine();
                String[] parts = line.split(",");

                if (parts.length == 3) {
                    String studentId = parts[0].trim();
                    String name = parts[1].trim();
                    double score = Double.parseDouble(parts[2].trim());

                    Student student = new Student(studentId, name, score);
                    students.add(student);
                }
            }

            scanner.close();
        } catch (IOException e) {
            System.out.println("文件读取错误：" + e.getMessage());
        }

        return students;
    }

    public static void saveStudentData(List<Student> students, String filename) {
        try {
            FileWriter writer = new FileWriter(filename);

            for (Student student : students) {
                writer.write(student.getStudentId() + "," + student.getName() + "," + student.getScore() + "\n");
            }

            writer.close();
        } catch (IOException e) {
            System.out.println("文件保存错误：" + e.getMessage());
        }
    }
}

请确保将文件 `1.txt` 放在与代码相同的目录下，文件内容格式如下：

学号1,姓名1,成绩1
学号2,姓名2,成绩2
学号3,姓名3,成绩3
...

注意：这只是一个简单的示例，没有对输入进行严格的错误处理。在实际应用中，你可能需要增加更多的错误处理和异常处理机制。此外，删除信息后会将修改后的数据保存回原文件。