How to convert comma-separated String to List?

Question

Is there any built-in method in Java which allows us to convert comma separated String to some container (e.g array, List or Vector)? Or do I need to write custom code for t

Answer 1

List<String> items = Arrays.asList(commaSeparated.split(","));

That should work for you.

Answer 2

ArrayList<HashMap<String, String>> mListmain = new ArrayList<HashMap<String, String>>(); 
String marray[]= mListmain.split(",");

Answer 3

You can first split them using String.split(","), and then convert the returned String array to an ArrayList using Arrays.asList(array)

Answer 4

Two steps:

1. String [] items = commaSeparated.split("\\s*,\\s*");
2. List<String> container = Arrays.asList(items);

Answer 5

You can do it as follows.

This removes white space and split by comma where you do not need to worry about white spaces.

    String myString= "A, B, C, D";

    //Remove whitespace and split by comma 
    List<String> finalString= Arrays.asList(myString.split("\\s*,\\s*"));

    System.out.println(finalString);

Answer 6

String -> Collection conversion: (String -> String[] -> Collection)

//         java version 8

String str = "aa,bb,cc,dd,aa,ss,bb,ee,aa,zz,dd,ff,hh";

//          Collection,
//          Set , List,
//      HashSet , ArrayList ...
// (____________________________)
// ||                          ||
// \/                          \/
Collection<String> col = new HashSet<>(Stream.of(str.split(",")).collect(Collectors.toList()));

Collection -> String[] conversion:

String[] se = col.toArray(new String[col.size()]);

String -> String[] conversion:

String[] strArr = str.split(",");

And Collection -> Collection:

List<String> list = new LinkedList<>(col);