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发信人: slight (不知所谓), 信区: Java
标 题: [转载] JDK的现在和未来技术展现－－来自SUN的消息(转寄)
发信站: 荔园晨风BBS站 (Thu Apr 4 12:29:37 2002), 转信
【 以下文字转载自 slight 的信箱 】
【 原文由 slight.bbs@bbs.sjtu.edu.cn 所发表 】
发信人: tryme (祝你快乐平安), 信区: Java
标 题: JDK的现在和未来技术展现－－来自SUN的消息
发信站: 饮水思源 (2002年04月01日21:01:41 星期一), 站内信件
JDK的现在和未来技术展现－－来自SUN的消息
/tryme
其实到现在一直没有正式的开始使用1.4，因为1.4版本的jdk不能
说是一种增强，而是一种改变了。很多实用的package和class，直接
导致了代码本身也需要升级。利用好jdk1.4的新特性，已经不再是换
一个JVM就得了的事情。
SUN是这么说的，1.4常规新特性有：
* HotSpot virtual machine(快速的执行，优化得编译器）
* Full 64-bit support(或许SPARC芯片将得到全面提升)
* Improved garbage collection
* Ability to exploit multiprocessing
* Optimization of the Java2D API
Class和API的新特性：
* Internationalization: Includes full Unicode 3.0 support,
a new character-encoding API for pluggable character
converters, support for Thai and Hindi languages, and a
new currency class so that currencies can be referenced
independently of locales.
* Java DataBase Connectivity (JDBCTM): Provides enhancements
such as connection pool configuration improvements,
statement pooling for pooled connections, and a description
of the migration path from the JDBC Service Provider
Interface (SPI) to the J2EE connector architecture.
新Package和Class：
* New I/O: (java.nio) includes fast buffered binary and
character I/O, better threading capabilities so that one
thread can handle many connections, and improvements for
better scalability.（这里增加的可都是好东东啦！）
* Regular expressions: (java.util.regex) provides pattern
matching,a favorite of PERL programmers.
* Assertion facility: allows for simple assertions, which can
be turned on for debugging purposes and extra checking.
Assertions are Boolean expressions that the programmer
believes to be true concerning the state of a computer
process. Assertions uncover
programmer misconceptions concerning a program's behavior.
* Full XML support: with Java API for XML Processing ("JAXP"),
Extensible Stylesheet Language Transformation (XSLT) support,
and Simple API for XML (SAX) and DOM
* Properties API: (java.util.properties) enables applications
to save user-specific preferences.
* Many new improvements in Java 2D, including a new pipeline
architecture,pluggable image I/O framework, support for
TrueType and OpenType fonts, hardware acceleration, and more.
* Logging API: (package java.util.logging) provides the classes
and interfaces of a core logging facility for the Java platform.
被成为"Mantis"（螳螂）的JDK1.4.2，SUN说，将主要做性能上提升优化工作，
预计2003年初推出。
至于全新的下个被称为"Tiger"的JDK1.5版本，则作了这样的描述：
developers will get better support for constants, providing
programming shortcuts using import statements, improvements for
iterating over collections, and metadata either as a keyword
addition or a javadoc feature.
并在其中强力推出两大功能（呵呵，或许是以前是C++的程序员梦寐以求的）：
* Generics, similar to templates in C++
* Autoboxing of primitives, which will resolve some problems with
casting
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※ 来源:·饮水思源 bbs.sjtu.edu.cn·[FROM: 202.120.224.18]
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※ 转寄:·饮水思源 bbs.sjtu.edu.cn·[FROM: 小百合BBS]
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※ 转载:·荔园晨风BBS站 bbs.szu.edu.cn·[FROM: 192.168.32.62]
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