convert string of valid JSON to JSON object in java, so I can index into it : right now I have this string: 

```
[{"row 0":[{},{},{},{},{},{},{},{}]},{"row 1":[{},{},{},{},{},{},{},{}]},{"row 2":[{},{},{},{},{},{},{},{}]},{"row 3":[{},{},{},{},{},{},{},{}]},{"row 4":[{"column 0":"WhitePawn"},{},{},{},{},{},{},{}]},{"row 5":[{},{},{},{},{},{},{},{}]},{"row 6":[{},{},{},{},{},{},{},{}]},{"row 7":[{},{},{},{},{},{},{},{}]}]
```
^it's currently a String, let's call it `string`, 

I'm trying to convert it into JSON like so: 

```
new JSONObject(string);
```

but it isn't working... how to do this in Java? 

