Java – gson JSON parser array

I want to parse some JSON and parse the array Unfortunately, I can't figure out how to handle nested arrays in JSON

JSON

{
    "type": "MultiPolygon","coordinates": [
        [
            [
                [
                    -71.25,42.33
                ],[
                    -71.25,42.33
                ]
            ]
        ],[
            [
                [
                    -71.23,[
                    -71.23,42.33
                ]
            ]
        ]
    ]
}

What did I achieve when I was just an array

public class JsonObjectBreakDown {
    public String type; 
    public List<List<String[]>> coordinates = new ArrayList<>();
    public void setCoordinates(List<List<String[]>> coordinates) {
        this.coordinates = coordinates;
    }




}

Resolve call

JsonObjectBreakDown p = gson.fromJson(withDup,JsonObjectBreakDown.class);

Solution

You have a string array of arrays You need

public List<List<List<String[]>>> coordinates = new ArrayList<>();

following

public static void main(String args[]) {
    Gson gson = new Gson();
    String jsonstr ="{  \"type\": \"MultiPolygon\",\"coordinates\": [        [            [                [                    -71.25,42.33                ],[                    -71.25,42.33                ]            ]        ],[            [                [                    -71.23,[                    -71.23,42.33                ]            ]        ]    ]}";
    JsonObjectBreakDown obj = gson.fromJson(jsonstr,JsonObjectBreakDown.class);

    System.out.println(Arrays.toString(obj.coordinates.get(0).get(0).get(0)));
}

public static class JsonObjectBreakDown {
    public String type; 
    public List<List<List<String[]>>> coordinates = new ArrayList<>();
    public void setCoordinates(List<List<List<String[]>>> coordinates) {
        this.coordinates = coordinates;
    }
}

print

[-71.25,42.33]