Add another item to a List<>

Question

I am trying to add another item to an existing List<> in my Android application. My List<> is initialised here:

List<ListsRecyclerViewList> list = new Arrays.asList(newListsRecyclerViewList("item", "item"));

The ListsRecyclerViewList class looks like this:

public String name;
public String date;

public ListsRecyclerViewList(String name, String date) {
    this.name = name;
    this.date = date;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getDate() {
    return name;
}

public void setDate(String date) {
    this.date = date;
}

Is there any way to add another item to the List<>? Any suggestions on how to achieve this?

You can just wrap it in new ArrayList<ListsRecyclerViewList>(Arrays.asList(...)) also... — diatrevolo
– diatrevolo, Commented Feb 2, 2016 at 20:22

George Mulligan · Accepted Answer · 2016-02-02 20:23:02Z

1

The List returned from using Arrays.asList(...) cannot have its size modified as explained in its documentation:

Returns a List of the objects in the specified array. The size of the List cannot be modified, i.e. adding and removing are unsupported, but the elements can be set. Setting an element modifies the underlying array.

Do this instead:

List<ListsRecyclerViewList> list = new ArrayList<>();
list.add(newListsRecyclerViewList("item", "item"));

and then sometime later:

list.add(newListsRecyclerViewList("anotherItem", "anotherItem"));

answered Feb 2, 2016 at 20:23

George Mulligan

11.9k6 gold badges39 silver badges50 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Add another item to a List<>

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related