Very simple embed nosql database to store and retrive data in JSON format, it is built on top of google's Json library (gson). It's recommended for simple data storage and retrive.
In PiccoloDB the database is a simple folder with files in it, so basically any folder can be used, here is an example of how load a database in a random selected folder:
String basePath = System.getProperty("java.io.tmpdir") + "TESTDB\\";
PiccoloDB db = new PiccoloDB();
db.load(basePath);
JsonObject o = new JsonObject();
o.addProperty("field1", "Bla");
// Entity/Table Identifier
db.save(o, "entitytest", 1l);
JsonObject jsonObject = db.get("entitytest", 1l);
List<JsonObject> result = db.listAll("entitytest");
More features comming out soon!