How to write serializable object to String without writing to file?

I want to write a class object to the string and then again create an object from it. I searched on the net but all I found is to write an object to file however I want to write in the string, not on file.

Below is the example of writing to file similarly I want to write in String or similar Object and not in the file.

some_class implements serializable {
    ...
}

FileOutputStream f = new FileOutputStream(new File("myObjects.txt"));
ObjectOutputStream o = new ObjectOutputStream(f);

// Write objects to file
o.writeObject(object1);

o.close();
f.close();

FileInputStream fi = new FileInputStream(new File("myObjects.txt"));
ObjectInputStream oi = new ObjectInputStream(fi);

// Read objects
some_class object2 = (some_class) oi.readObject();

oi.close();
fi.close();

Please help with the same.

This would be one way:

try 
{
    // To String
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream os = new ObjectOutputStream(bos);
    os.writeObject(object1);
    String serializedObject1 = bos.toString();
    os.close();

    // To Object 
    ByteArrayInputStream bis = new ByteArrayInputStream(serializedObject1.getBytes());
    ObjectInputStream oInputStream = new ObjectInputStream(bis);
    YourObject restoredObject1 = (YourObject) oInputStream.readObject();            

    oInputStream.close();
} catch(Exception ex) {
    ex.printStackTrace();
}

I would prefer the Base64 way though.

This would be an example of encoding:

private static String serializableToString( Serializable o ) throws IOException {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(o);
        oos.close();
        return Base64.getEncoder().encodeToString(baos.toByteArray()); 
    }

And this is an example of decoding:

 private static Object objectFromString(String s) throws IOException, ClassNotFoundException 
   {
        byte [] data = Base64.getDecoder().decode(s);
        ObjectInputStream ois = new ObjectInputStream( 
                                        new ByteArrayInputStream(data));
        Object o  = ois.readObject();
        ois.close();
        return o;
   }