Package
Primary Function
java.awt.font
Represents various types of fonts.
java.awt.geom
Allows you to work with geometric shapes.
java.awt.im
Allows input of Japanese, Chinese, and Korean characters to text
editing components.
java.awt.im.spi
Suppor ts alternative input devices.
java.awt.image
Processes images.
java.awt.image.renderable
Suppor ts rendering-independent images.
java.awt.print
Suppor ts general print capabilities.
java.beans
Allows you to build software components.
java.beans.beancontext
Provides an execution environment for Beans.
java.io
Inputs and outputs data.
java.lang
Provides core functionality.
java.lang.annotation
Suppor ts annotations (metadata).
java.lang.instrument
Suppor ts program instrumentation.
java.lang.management
Suppor ts management of the execution environment.
java.lang.ref
Enables some interaction with the garbage collector.
java.lang.reflect
Analyzes code at run time.
java.math
Handles large integers and decimal numbers.
java.net
Suppor ts networking.
java.nio
Top-level package for the NIO classes. Encapsulates buf fers.
java.nio.channels
Encapsulates channels, which are used by the NIO system.
java.nio.channels.spi
Suppor ts ser vice providers for channels.
java.nio.charset
Encapsulates character sets.
java.nio.charset.spi
Suppor ts ser vice providers for character sets.
java.rmi
Provides remote method invocation.
java.rmi.activation
Activates persistent objects.
java.rmi.dgc
Manages distributed garbage collection.
java.rmi.registr y
Maps names to remote object references.
java.rmi.ser ver
Suppor ts remote method invocation.
java.security
Handles cer tificates, keys, digests, signatures, and other security
functions.
java.security.acl
Manages access control lists.
java.security.cer t
Parses and manages cer tificates.
java.security.inter faces
Defines inter faces for DSA (Digital Signature Algorithm) keys.
java.security.spec
Specifies keys and algorithm parameters.
java.sql
Communicates with a SQL (Structured Quer y Language) database.
TABLE 27-1
The Core Java API Packages (continued)
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