How to Serialize ArrayList in Java?

// Java program to demonstrate serialization of ArrayList

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.util.ArrayList;

public class ArrayListEx {

    // method to serialize an ArrayList object
    static void serializeArrayList()
    {

        // an ArrayList
        // object "namesList"
        // is created
        ArrayList<String> namesList
            = new ArrayList<String>();

        // adding the data into the ArrayList
        namesList.add("Geeks");
        namesList.add("for");
        namesList.add("Geeks");

        try {
            // an OutputStream file
            // "namesListData" is
            // created
            FileOutputStream fos
                = new FileOutputStream("namesListData");

            // an ObjectOutputStream object is
            // created on the FileOutputStream
            // object
            ObjectOutputStream oos
                = new ObjectOutputStream(fos);

            // calling the writeObject()
            // method of the
            // ObjectOutputStream on the
            // OutputStream file "namesList"
            oos.writeObject(namesList);

            // close the ObjectOutputStream
            oos.close();

            // close the OutputStream file
            fos.close();

            System.out.println("namesList serialized");
        }
        catch (IOException ioe) {
            ioe.printStackTrace();
        }
    }

    // Driver method
    public static void main(String[] args) throws Exception
    {
        // calling the
        // serializeArrayList() method
        serializeArrayList();
    }
}