Converting String array to java.util.List

java arrays collections
Hitesh Dangi picture Hitesh Dangi · May 17, 2011 · Viewed 184k times · Source

How do I convert a String array to a java.util.List?

Answer

Andreas Dolk picture Andreas Dolk · May 17, 2011 
List<String> strings = Arrays.asList(new String[]{"one", "two", "three"});

This is a list view of the array, the list is partly unmodifiable, you can't add or delete elements. But the time complexity is O(1).

If you want a modifiable a List:

List<String> strings = 
     new ArrayList<String>(Arrays.asList(new String[]{"one", "two", "three"}));

This will copy all elements from the source array into a new list (complexity: O(n))

Related questions

Converting 'ArrayList<String> to 'String[]' in Java

How might I convert an ArrayList<String> object to a String[] array in Java?

Read More
How to convert an Array to a Set in Java

I would like to convert an array to a Set in Java. There are some obvious ways of doing this (i.e. with a loop) but I would like something a bit neater, something like: java.util.Arrays.asList(Object[] …

Read More
How to convert List<Integer> to int[] in Java?

This is similar to this question: How to convert int[] to Integer[] in Java? I'm new to Java. How can i convert a List<Integer> to int[] in Java? I'm confused because List.toArray() actually returns an Object[], …

Read More