You can see what i am talking about in this picture

I have an array called "statusLikers" under a class called "Status". I am trying to create a facebook/instagram like/unlike functionality on button click.
Now, before i move on from where i am, i am trying to figure out how to remove users from the array.
I know how to add to th array but i dont know how to delete from it.
The way i am going about it is like this
List<Object> likesPpl = status.getList("statusLikers");
JSONObject myObject = new JSONObject();
try {
myObject.put("statusLikers", currUser.getUsername());
} catch (JSONException e1) {
e1.printStackTrace();
}
likesPpl.removeAll(Arrays.asList(myObject));
but it does not seem to work, first i want to learn to remove items from the array before i create the if statements.