How to Convert a Java HashMap to a JSONObject and JSON String?

Converting HashMap to JSONObject and JSON String in Java

Converting a HashMap to a JSON object in Java is a straightforward process. To achieve this, you can utilize the JSONObject provided by the JSON-Java library.

Firstly, instantiate a new JSONObject by passing in the HashMap as an argument:

JSONObject jsonObject = new JSONObject(map);

The resulting JSONObject will contain key-value pairs corresponding to the HashMap's entries. Incidentally, JSON-Java also offers other useful functions that you can explore by referring to its documentation.

To further convert the JSONObject to a JSON string, simply call the toString() method:

String jsonString = jsonObject.toString();

You can then work with the resulting JSON string as necessary.

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