Changing an Array to an ArrayList

Question

I am attempting to change the following array line into an ArrayList that will function the same way:

private String[] books = new String[5];

I changed it to this but it is not functioning properly:

private ArrayList<String>(Arrays.asList(books))

I thought this was how an ArrayList was created

possible duplicate of [this question](http://stackoverflow.com/q/157944/1065197) — Luiggi Mendoza, Dec 18 '13 at 23:05

score 1 · Accepted Answer · answered Dec 18 '13 at 23:05

1

You need to create it like this:

private ArrayList<String> booksList = new ArrayList<String>(Arrays.asList(books));

new ArrayList<String>(Arrays.asList(books)) is the part which is turning your array into an ArrayList.

You could also do:

private List<String> booksList = Arrays.asList(books);

If the fact that it is an ArrayList doesn't matter.

answered Dec 18 '13 at 23:05

Tom Leese

I keep getting errors that `ArrayList` cannot be resolved to a type – Dingles Dec 18 '13 at 23:25
@Dingles make sure you have imported the right classes from the right packages. You should have `package your.package.name; import java.util.ArrayList; import java.util.Arrays; (...)` at the top of your file. – Luiggi Mendoza Dec 19 '13 at 01:02
Ahhh I forgot the `import java.util.Arrays` package. – Dingles Dec 19 '13 at 03:06

score 0 · Answer 2 · edited May 23 '17 at 12:22

0

new ArrayList<Element>(Arrays.asList(array))

*** new

edited May 23 '17 at 12:22

Community

answered Dec 18 '13 at 23:03

JayD

1

Instead of adding an answer pointing to an existing Q/A, flag the question as duplicate. – Luiggi Mendoza Dec 18 '13 at 23:05
will do.. kind of new to SO – JayD Dec 18 '13 at 23:10

2 Answers2