The base package These topics cover the built-in classes for the base class The Application class The base.Application class provides a set of utility functions related to the program environment. The Channel class The base.Channel class is a built-in class providing basic input/output functions. The SqlHandle class The base.SqlHandle class is a built-in class providing an API to execute parameterized SQL statements, with or without result sets. The StringBuffer class The base.StringBuffer class is a built-in class designed to manipulate character strings. The StringTokenizer class The base.StringTokenizer class is designed to parse a string to extract tokens based on delimiters. The TypeInfo class The MessageServer class The base.MessageServer class allows a program to send a key action over the network to other programs using this service.