无法序列化/反序列化ArrayList

import java.io.*;

public class ArrayListSerialization {
    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("Hello");
        arrayList.add("World");

        try {
            FileOutputStream fileOut = new FileOutputStream("arrayList.ser");
            ObjectOutputStream out = new ObjectOutputStream(fileOut);
            out.writeObject(arrayList);
            out.close();
            fileOut.close();

            FileInputStream fileIn = new FileInputStream("arrayList.ser");
            ObjectInputStream in = new ObjectInputStream(fileIn);
            ArrayList<String> deserializedList = (ArrayList<String>) in.readObject();
            in.close();
            fileIn.close();

            System.out.println(deserializedList);
        } catch (IOException i) {
            i.printStackTrace();
        } catch (ClassNotFoundException c) {
            System.out.println("ArrayList class not found");
            c.printStackTrace();
        }
    }
}

import com.google.gson.Gson;

public class ArrayListSerialization {
    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("Hello");
        arrayList.add("World");

        Gson gson = new Gson();
        String json = gson.toJson(arrayList);
        System.out.println(json);

        ArrayList<String> deserializedList = gson.fromJson(json, ArrayList.class);
        System.out.println(deserializedList);
    }
}

import java.io.*;
import java.util.*;
import java.util.stream.Collectors;

public class ArrayListSerialization {
    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("Hello");
        arrayList.add("World");

        String serializedList = arrayList.stream().collect(Collectors.joining(","));
        System.out.println(serializedList);

        ArrayList<String> deserializedList = new ArrayList<>(Arrays.asList(serializedList.split(",")));
        System.out.println(deserializedList);
    }
}