The util package These topics cover the classes for the util package. The util.Date class The util.Date class provides DATE data-type related utility methods. The util.Datetime class The util.Datetime class provides DATETIME data-type related utility methods. The util.Integer class The util.Integer class provides INTEGER data-type related utility methods. The util.Interval class The util.Interval class provides INTERVAL data-type related utility methods. The util.Strings class The util.Strings class provides STRING data-type related utility methods. The util.Math class The util.Math class provides basic mathematical functions based on floating point numbers (FLOAT). The util.JSON class The util.JSON class provides a basic interface to convert program variable values to/from JSON data. The util.JSONObject class The util.JSONObject class provides methods to handle an structured data object following the JSON string syntax. The util.JSONArray class The util.JSONArray class provides methods to handle an array of values, following the JSON string syntax.