Convert ArrayList to String[]

Question

How I can convert ArrayList<String> to String[]? I'm tried to use this code:

ArrayList<String> al = getResources()...; //getting string-array from values.xml
String[] data = new String[al.size()];

for (int i = 0; i != al.size(); i++) {
    data[i] = al.get(i);
}

But it's very slow. How I can do it faster?

score 8 · Accepted Answer · answered Dec 20 '13 at 13:02

8

(String[]) al.toArray(); will do the trick.

answered Dec 20 '13 at 13:02

Juvanis

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Ejjectly.. Fast and Correct. – Hardik Joshi Dec 20 '13 at 13:03
Wow... so many answers for that short time! – Helisia Dec 20 '13 at 13:07

score 6 · Answer 2 · answered Dec 20 '13 at 13:03

6

Use ArrayList.toArray() method to convert list of string to array of string.

Do like this

String[] data = al.toArray(new String[al.size()]);

answered Dec 20 '13 at 13:03

Prabhakaran Ramaswamy

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score 0 · Answer 3 · edited Jun 08 '17 at 07:16

0

Try the following code:

arraylist.toArray(array); // fill the array

edited Jun 08 '17 at 07:16

hackjutsu

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answered Dec 20 '13 at 13:45

Ganesh Katikar

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Convert ArrayList to String[]

3 Answers3