net.sf.json.JSONObject string to json

To convert a JSON string to a JSON object using `net.sf.json.JSONObject`, you can follow these steps:

1. Import the required classes:

import net.sf.json.JSONObject;

2. Create a `JSONObject` instance and pass the JSON string as a parameter to its constructor:

String jsonString = "{\"name\": \"John\", \"age\": 30}";
JSONObject jsonObject = new JSONObject(jsonString);

Now, the `jsonObject` variable holds the JSON object representation of the provided JSON string.

You can access the values in the JSON object using various methods provided by the `JSONObject` class. For example:

String name = jsonObject.getString("name");
int age = jsonObject.getInt("age");

Make sure you have the `json-lib` library in your classpath to use `net.sf.json.JSONObject`.