Packages and Packaging - Java - page 817

Table 21-1. Java packages basic structure

Name Function

Applets for browser use

java.applet

Graphical User Interface

java.awt

Reading and writing java.io

Intrinsic classes (String, etc.) java.lang

java.lang.annotation Library support for annotation processing

Math library

java.math

Networking (sockets)

java.net

“New” I/O (not new anymore): Channel-based I/O

java.nio

Java database connectivity java.sql

Handling and formatting/parsing dates, numbers, messages java.text

Java 8: Modern date/time API (JSR-311)

java.time

Utilities (collections, date)

java.util

Regular Expressions java.util.regex

JNDI

javax.naming

Support for printing

javax.print

Java 6: Scripting engines support javax.script

Modern Graphical User Interface

javax.swing

Many packages have been added over the years, but the initial structure has stood the test of
time fairly well. In this chapter, I show you how to create and document your own packages,
and then discuss a number of issues related to deploying your package in various ways on
various platforms.