JSONObject json = new JSONObject();

    try {
        json.put("CustomerID", "069C21F1-EE87-4FB4-A129-478AEAA454FF");
        json.put("Name", "Name_" + (int) Math.random() * 1000);
} catch (JSONException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

1. prepare a LinkedHashMap object with elements

2. convert it to JSONObject

Map obj = new LinkedHashMap();
obj.put("a", "String1");
obj.put("b", new Integer(1));
obj.put("c", new Boolean(true));
obj.put("d", "String2");
JSONObject json = new JSONObject(obj);

public JSONObject(Map map)