CODEWITHSUNDEEP
javaarraylistcasting
jValls
jValls

Reputation: 39

string formed as arrayList to arrayList

I have the followings string from the DB "[["22-1-2017;10:00-19:00"],["22-1-2017;10:00-19:00"]]"

Is there an easy way to transform the string into an arrayList?

Thanks in advance

Upvotes: 0

Views: 90

Answers (3)

kism3t
kism3t

Reputation: 1361

I got one solution for your problem, if you want the date in an String Array:

    String s = "[[\"22-1-2017;10:00-19:00\"],[\"22-1-2017;10:00-19:00\"]]";

    // first remove outter brackets
    s = s.substring(1, s.length());
    s = s.substring(0, s.length()-1);

    // Create a Pattern for getting everything within brackets
    Pattern r = Pattern.compile("\\[(.*?)\\]");
    // Now create matcher object.
    Matcher m = r.matcher(s);

    List<String> l = new ArrayList<>();
    while (m.find()) {
        l.add(m.group(1));
    }
    System.out.println(l);

If you want it without the quotations use

    Pattern r = Pattern.compile("\\[\"(.*?)\"\\]");

Hope this helps

Edit: If you use the 

    Pattern r = Pattern.compile("\\[\"(.*?)\"\\]");

you do not need to remove the outer brackets at all, as it already looks for content within:

  • opening square brackets with double quotations
  • double quotations with closing square brackets

Upvotes: 0

kenn3th
kenn3th

Reputation: 1275

Try this,

String a = "[[\"22-1-2017;10:00-19:00\"],[\"22-1-2017;10:00-19:00\"]]";
String[] b = a.replace("[", "").replace("]", "").replace("\"", "").split(",");
List<String> c = Arrays.asList(b);

Output = [22-1-2017;10:00-19:00, 22-1-2017;10:00-19:00]

Upvotes: 0

Pshemo
Pshemo

Reputation: 124295

How about using JSON parser like gson?

String jsonArray = "[[\"22-1-2017;10:00-19:00\"],[\"22-1-2017;10:00-19:00\"]]";

Type listType = new TypeToken<List<List<String>>>(){}.getType();
List<List<String>> list = new Gson().fromJson(jsonArray, listType);

System.out.println(list);

Output: [[22-1-2017;10:00-19:00], [22-1-2017;10:00-19:00]]

Upvotes: 1

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