Converting a JavaScript Array that's been JSON.stringify to a Java Array

Question

Hello I'm trying to convert an Array which has been sent from my JavaScript after going through the JSON.stringify method. I'm currently experimenting/looking at a regex solution for it but anything that returns a normal JAVA Array<Integer> with the values between the "" works.

JAVA Code:

private ArrayList<Integer> convertJSONArrayStringtoArray(String jsonArrayString){


     Matcher m = Pattern.compile(".*\\\"(.*)\\\".*").matcher(jsonArrayString);
     while(m.find()) {
       System.out.println("convertJSONtoArray: " + m.group(1));    
     } 

    return null;

}

String Composition (Note that the string is not a JSON object that holds a array, just a simple array):

["12441","3324","11584","3337","25739","25810"]

There are plenty of JSON parser libraries available for Java. — Pointy, May 22 '15 at 13:59
http://stackoverflow.com/questions/2255220/how-to-parse-a-json-and-turn-its-values-into-an-array — adeneo, May 22 '15 at 14:00
I disagree with duplicate question, this question is not the same the linked one. It is asking how to deserialise that js array which is not a valid JSON therefore you cannot deserialise via a JSON serialiser directly. — Arijoon, May 05 '17 at 21:32

score 2 · Accepted Answer · answered May 22 '15 at 14:03

2

With using Gson, you can do:

    List<String> result = new Gson().fromJson( jsonArrayString, List.class );

answered May 22 '15 at 14:03

Sercan Ozdemir

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score 0 · Answer 2 · answered May 22 '15 at 14:18

It it is a one-shot and you feel using a whole library is overkill :

String input = "[\"12441\",\"3324\",\"11584\",\"3337\",\"25739\",\"25810\"]";
String[] tokens = input.substring(1, input.length()-2).split(",");
List<Integer> ints = Arrays.asList(tokens).stream().map(s -> Integer.parseInt(s.substring(1, s.length()-1))).collect(Collectors.toList());

Converting a JavaScript Array that's been JSON.stringify to a Java Array

2 Answers2