JSON parser read an entry by entry from large JSON file

It looks like Gson has a streaming API, which is what you want: https://sites.google.com/site/gson/streaming

With Jackson you can use a SAX-like approach (streaming) using a JsonParser object, in your case it would be something like this:

JsonFactory jsonFactory = new JsonFactory();JsonParser parser = jsonFactory.createParser(new File("/path/to/my/jsonFile"));// Map where to store your field-value pairs per objectMap<String, String> fields = new HashMap<String, String>();JsonToken token;while ((token = parser.nextToken()) != JsonToken.END_ARRAY) {    switch (token) {        // Starts a new object, clear the map        case START_OBJECT:            fields.clear();            break;        // For each field-value pair, store it in the map 'fields'        case FIELD_NAME:            String field = parser.getCurrentName();            token = parser.nextToken();            String value = parser.getValueAsString();            fields.put(field, value);            break;        // Do something with the field-value pairs        case END_OBJECT:            doSomethingWithTheObject(fields)            break;        }    }    parser.close();