Features Added to JDK 1.1 and Enhanced in JDK 1.2
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Trail
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Package
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JDK 1.1
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JDK 1.2 Enhancements
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Internationalization
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java.text
java.io
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Handles international languages and scripts
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Input method framework and minor API changes
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Sound
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java.applet
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Same as for 1.0.
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Support for non-applet sound; more sound formats.
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JavaBeans
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java.beans
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Reusable software components that can be manipulated in a GUI
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Runtime containment and services protocol; drag-and-drop support
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Security
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java.security
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Digital signature and message digest API. Applets confined to secure
environment and digitally signed JAR files
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Policy-oriented architecture; API to support cryptographic services and
key management; fine-grain access control for applets and applications
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JDBC Database Access
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java.sql
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Standard API to issue and process SQL statements
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Result sets that scroll forward and backward, batch updates, persistent
object storage, character stream support, and full precision
java.math.BigDecimal values
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Remote Method Invocation
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java.rmi
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Method-based standard API for network communications
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Remote object activation, downloadable socket factories, and minor
enhancements
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JAR File Format
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java.util.jar
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Mechanism to bundle and to sign Java program files
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Enhanced command line JAR tool, new API for reading and writing JAR
files, ability to reference JAR files at a specified URL
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Java Native Interface
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NA
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Standard naming and calling conventions for native method invocation
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New methods for library and version management, local reference
management, weak global references, array operations, string
operations, reflection support, and the invocation API
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Reflection
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java.lang.reflect
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Accesses information on fields, methods, and constructors of loaded classes
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Ability to bypass JDK 1.2 access controls
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The next table summarizes features added to JDK 1.2.
The first column in the table identifies the trails in this
tutorial in which you can find more information.
Summary of Features Added to JDK 1.2
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Trail
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Package
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JDK 1.2
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Collections
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java.util
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Groups and manipulates objects of different types
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2D Graphics
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java.awt
java.awt.color
java.awt.geom
java.awt.image
java.awt.print
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API for designing more interesting and user-friendly interfaces,
handling color, processing images, addressing multilingual
requirements, using stylized text, and printing
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Swing Components
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javax.swing
javax.swing.*
javax.swing.*.*
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Provides a rich set of GUI components; features include model-UI
separation and a pluggable look and feel
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Java IDL
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org.omg.CORBA
org.omg.CosNaming
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Invokes a transparent remote operation
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Java Extension Mechanism
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NA
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Adds extensions to core platform
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Reference Objects
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java.lang.ref
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Creates a reference to an object so a program can maintain a reference
to that object after it is eligible for garbage collection
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Because servlets are a standard extension, not part of the JDK, they
aren't mentioned in either table. To read more about servlets, see the
trail Servlets.
