# Getting nested JSON float values
**URL:** https://discourse.processing.org/t/getting-nested-json-float-values/16674
**Category:** Coding Questions
**Created:** [December 28, 2019, 1:13pm UTC](https://discourse.processing.org/t/getting-nested-json-float-values/16674 "2019-12-28T13:13:39Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@AndreasRef](https://discourse.processing.org/u/AndreasRef)
#### Post date: [December 28, 2019, 1:13pm UTC](https://discourse.processing.org/t/getting-nested-json-float-values/16674/1 "2019-12-28T13:13:39Z")
Given a JSON file formatted as shown in the screenshot below, how do I acces the individual float values using Processing JSONArray + JSONObject?
---
### Author:  [@Chrisir](https://discourse.processing.org/u/Chrisir)
#### Post date: [December 28, 2019, 1:31pm UTC](https://discourse.processing.org/t/getting-nested-json-float-values/16674/2 "2019-12-28T13:31:14Z")
you can play with this for a start
(or post a short version of the json data as text)
```auto
JSONArray values;
void setup() {
values = loadJSONArray("new.json");
for (int i = 0; i < values.size(); i++) {
JSONObject animal = values.getJSONObject(i);
JSONArray values2 = animal.getJSONArray("bboxes");
JSONArray values3 = values2.getJSONArray(0);
float id = values3.getFloat(0);
println( id );
}
}
```
---
### Author:  [@GoToLoop](https://discourse.processing.org/u/GoToLoop)
#### Post date: [December 28, 2019, 2:08pm UTC](https://discourse.processing.org/t/getting-nested-json-float-values/16674/3 "2019-12-28T14:08:15Z")
> [@AndreasRef](#):
>
> , how do I access the individual `float` values using Processing JSONArray + JSONObject?
Something like 0.008510975167155266 is `double` precision rather than just `float`: ⚠
> **[double / Reference](https://processing.org/reference/double.html)**
>
> Datatype for floating-point numbers larger than those that can be stored in a float. A float is a 32-bit values that can be as large as 3.40282347E+38 and as low as -3.40282347E+38. A
What you’re requesting is pretty much what I’ve recently coded for this forum thread: 😸
> [@Saving/Storing a multidimensional array](https://discourse.processing.org/t/saving-storing-a-multidimensional-array/16391/5):
>
> For completeness’ sake I’m posting the “finalized” version which adds the loading part: angel /\*\* \* Conversion Arr3d to JSONArr3d (v1.0) \* GoToLoop (2019/Dec/17) \* Discourse.Processing.org/t/saving-storing-a-multidimensional-array/16391/5 \*/ static final String FILENAME = "JArr3D.json", OPT = "compact"; static final int RANGE = 100, DIMS = 4; double[][][] my3dArr = generateArr3d(RANGE, DIMS); JSONArray my3dJarr; void setup() { my3dJarr = arr3dToJarr3d(my3dArr); println(my3dJarr.for…
Given you’ve already got the JSON file, there’s no need for the create & save util functions.
So we’re just gonna need **jarr3dToArr3d()** & **joinArr3d()** from the original sketch.
Basically the only thing I had to change was the statement below:
`final JSONArray jarr2d = jarr3d.getJSONArray(z);`
B/c the 2D `double[][]` array is inside a JSONObject w/ key “bboxes”:
`final JSONArray jarr2d = jarr3d.getJSONObject(z).getJSONArray("bboxes");`
It’d be easier if I just had your JSON file rather than type in the whole thing from your screenshot: 😑
```auto
[
{
"filename": "000000000285.jpg",
"bboxes": [
[
0.008510975167155266,
0.3988480269908905,
0.2383737415075302,
0.615890383720398
],
[
0.45662403106689453,
0.5138434171676636,
0.5538952350616455,
0.7475001811981201
]
]
}
]
```
Anyways, here’s the adapted sketch which deals w/ your particular JSON file: 😇
```auto
/**
* Conversion JSONArr3d to Arr3d (v1.0)
* GoToLoop (2019/Dec/28)
*
* Discourse.processing.org/t/getting-nested-json-float-values/16674/3
* Discourse.Processing.org/t/saving-storing-a-multidimensional-array/16391/5
*/
static final String FILENAME = "JArr3D.json", ENTRY = "bboxes";
double[][][] my3dArr;
JSONArray my3dJarr;
void setup() {
my3dJarr = loadJSONArray(FILENAME);
my3dArr = jarr3dToArr3d(my3dJarr);
println(joinArr3d(my3dArr));
exit();
}
static final double[][][] jarr3dToArr3d(final JSONArray jarr3d) {
final int lenZ = jarr3d.size();
final double[][][] arr3d = new double[lenZ][][];
for (int z = 0; z < lenZ; ++z) {
// final JSONArray jarr2d = jarr3d.getJSONArray(z);
final JSONArray jarr2d = jarr3d.getJSONObject(z).getJSONArray(ENTRY);
final int lenY = jarr2d.size();
final double[][] arr2d = arr3d[z] = new double[lenY][];
for (int y = 0; y < lenY; ++y)
arr2d[y] = jarr2d.getJSONArray(y).getDoubleArray();
}
return arr3d;
}
static final String joinArr3d(final double[][][] arr3d) {
final StringBuilder sb = new StringBuilder();
int idxZ = 0;
for (final double[][] arr2d : arr3d) {
int idxY = 0;
sb.append(ENTER);
for (final double[] arr1d : arr2d) {
int idxX = 0;
for (final double d : arr1d) sb
.append('[').append(idxZ).append("][")
.append(idxY).append("][").append(idxX++)
.append("] ").append(d).append(ENTER);
++idxY;
}
++idxZ;
}
return sb.toString();
}
```
---
### Author:  [@AndreasRef](https://discourse.processing.org/u/AndreasRef)
#### Post date: [December 28, 2019, 5:13pm UTC](https://discourse.processing.org/t/getting-nested-json-float-values/16674/4 "2019-12-28T17:13:01Z")
Thanks so much @Chrisir & @GoToLoop 🙂