编写一个应用程序，要求将LinkedList创建的对象写入文件，在读出一个LinkedList节点中的数据。

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

public class Main {

    public static void main(String[] args) {
        new Main().runFunction();
    }

    private void writeIn(File file, LinkedList<String> list) throws IOException {
        ObjectOutputStream out = null;

        try {
            out = new ObjectOutputStream(new FileOutputStream(file, false));
            out.writeObject(list);
        } finally {
            if (out != null) {
                out.close();
            }
        }
    }

    private void readOut(File file) throws IOException, ClassNotFoundException {

        ObjectInputStream objectIn = null;

        try {
            objectIn = new ObjectInputStream(new FileInputStream(file));
            Object data;
            while ((data = objectIn.readObject()) != null) {
                List<String> list = (List)data;
                for (String poi : list) {
                    System.out.println(poi);
                }
            }
        }finally {
            if (objectIn != null) {
                objectIn.close();
            }
        }

    }

    private void runFunction() {

        File file = new File("d:\\java\\test\\ObjectFile.txt");
        LinkedList<String> list = new LinkedList<String>();

        String[] string = {"stringa\n", "stringb\n", "stringc\n", "stringd\n"};
        for (String temp : string) {
            list.add(temp);
        }

        try {
            if (file.exists() == false) {
                if (file.getParentFile().exists() == false)
                    file.getParentFile().mkdirs();
                file.createNewFile();
            }
            writeIn(file, list);
            readOut(file);
        } catch (IOException e) {
            e.getStackTrace();
            throw new RuntimeException("\n程序运行发生错误，请重试");
        }catch(ClassNotFoundException ee) {
            ee.getStackTrace();
            throw new RuntimeException("\n类运行发生错误，请重试");
        }

    }
}