Converting JavaScript Multi dimension Array into Java Array

Question

I am using HandsOnTable to perform some business operation but while saving the form i retrieve data with method

handsOnTable.getData();

which returns something like (JavaScript Array)

[[1,2,3],[4,5,6],[7,8,9]] 

but I am not able to figure out a way to convert this into

List<List<Integer>>

Answer 1

GSON will do this for you automatically. I think this will get it done:

Gson gson = new Gson();
String json = "[[1,2,3],[4,5,6],[7,8,9]]";
java.lang.reflect.Type.Type listOfListsOfIntsType = new com.google.gson.reflect.TypeToken.TypeToken<List<List<Integer>>>(){}.getType();
List<List<Integer>> list = gson.fromJson(json, listOfListsOfIntsType);

You can skip the TypeToken business if you define a class with a member variable of type List<List<Integer>> and just pass that class as the 2nd argument to fromJson().

Answer 2

try this:

    int[][] dataArray = new int[][] { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
    List<List<Integer>> dataList = new ArrayList<List<Integer>>();
    for (int i = 0; i < dataArray.length; i++) {
        List<Integer> tmpList = new ArrayList<Integer>();
        dataList.add(tmpList);
        for (int j = 0; j < dataArray[i].length; j++) {
            tmpList.add(dataArray[i][j]);
            System.out.println(dataArray[i][j]);
        }
    }