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How can I convert String[] to ArrayList<String>
hi please can anyone help me I have :
private String results[];
private ArrayList<String> alist;
I want convert
String results[] to ArrayList<String>
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4 Answers
Convert String Array to ArrayList as
String[] results = new String[] {"Java", "Android", "Hello"};
ArrayList<String> strlist =
new ArrayList<String>(Arrays.asList(results));
1 Comment
user1007666
The method putStringArrayListExtra(String, ArrayList<String>) in the type Intent is not applicable for the arguments (String, List<String>)intent.putStringArrayListExtra("stock_list", strings);
You can use the Arrays.asList() method to convert an array to a list.
E.g. List<String> alist = Arrays.asList(results);
Please note that Arrays.asList() returns a List instance, not an ArrayList instance. If you really need an ArrayList instance you can use to the ArrayList constuctor an pass the List instance to it.
1 Comment
nkr
Note that the resulting List of
Arrays.asList() will have a fixed size, adding elements will result in an UnsupportedOperationException.Try this:
ArrayList<String> aList = new ArrayList<String>();
for(String s : results){
aList.add(s);
}
What this does is, it constructs an ArrayList of Strings called aList: ArrayList<String> aList = new ArrayList<String>();
And then, for every String in results: String s : results
It add's that string: aList.add(s);.
Hope this helps!
Comments
You should use
Arrays.asList(results)
by default, unless you absolutely for some reason must have an ArrayList.
For example, if you want to modify the list, in which case you use
new ArrayList(Arrays.asList(results))
answered Dec 8, 2012 at 14:29
Christoffer Hammarström
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