how to parse simple json string array to object in java

Question

I have a json array as a string in the following format:

 [ "Ford", "BMW", "Fiat" ]

which is a legal json string. How am I able to use Gson to save into an object? When I am trying to use getAsJsonArray(), but I get an error:

 java.lang.IllegalStateException: This is not a JSON Array.

check out stackoverflow.com/questions/19780576/… it might help guide you — Takarii
– Takarii, Commented Mar 30, 2017 at 11:45
take a look at this site : javatpoint.com/json-array and this : json.org/index.html — JHDev
– JHDev, Commented Mar 30, 2017 at 11:46
JsonArray jArray = new JsonParser().parse(jsonStr).getAsJsonArray(); works fine for me. If you got that exception this means that you are not parsing what you expect. Post proper minimal reproducible example (a.k.a. SSCCE) — Pshemo
– Pshemo, Commented Mar 30, 2017 at 11:52
I have added an example. I am unsure if this is what you are actually looking for? My solution it into String object since you only mentioned an object. Your question is vague, what object do you want to save it to? — kkflf
– kkflf, Commented Mar 30, 2017 at 11:58

kkflf · Accepted Answer · 2017-03-30 11:51:49Z

0

Use Gson to parse your Json array.

String input = "[ 'Ford', 'BMW', 'Fiat' ]";

Gson gson = new Gson();
String[] output = gson.fromJson(input, String[].class);

for(String s : output){
    System.out.println(s);
}

Output

Ford
BMW
Fiat

answered Mar 30, 2017 at 11:51

kkflf

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Pshemo Over a year ago

Thrown exception suggests that OP is not parsing valid JSON array, but what was posted in question is valid which suggests that problem is not how OP is parsing, but what.

Santy · Accepted Answer · 2017-03-31 10:26:25Z

0

You can use this to get value into arraylist using getAsJsonArray() Method

    String jsonStr = "['Ford', 'BMW', 'Fiat' ]";
    JsonArray root = new JsonParser().parse(jsonStr).getAsJsonArray();
    Gson gson = new Gson();
    ArrayList<String> staff = new ArrayList<>() ;
    Type listType = new TypeToken<List<String>>() {}.getType();
    List<String> yourList = new Gson().fromJson(root, listType);

    System.out.println(yourList );

edited Mar 31, 2017 at 10:26

answered Mar 30, 2017 at 12:09

Santy

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1 Comment

Santy Over a year ago

Remove unnecessary things

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