J2SE 1.4.2和J2SE 5.0困惑

betatoy

請問各位這兩個到底有什麽區別? 我看sun的網站上說的都差不多啊!!

eTony

http://www.huihoo.com/java/j2se/j2se1.5_features.html

hantsy

Post by betatoy
請問各位這兩個到底有什麽區別? 我看sun的網站上說的都差不多啊!!

j2se 5 是j2se 最新版本，也是1.4.2的升级版本，按sun 说法，java 5是java 10年以来最重要的升级，为了体现这种差别，新的j2se sdk 版本没有被命名为1.5，而直接叫5.
当然，按照某些人说法，这是sun习惯，比如solaries 2.8 直接叫solaries 8.

zlbruce

嘿！sun还真有个性！

betatoy

明白了! 謝謝!
請問哪到底是j2se 5(j2se 1.5.0)應用的範圍?V還是j2se 1.4.2的範圍?V?
我好像很少看見有人用j2se 5(j2se 1.5.0)啊!

menglianjing

没有呀！至少我是从1.3直接跳到1.5的。

cg111

SUN的官方解释：
http://java.sun.com/j2se/1.5.0/docs/relnotes/version-5.0.html
Version 1.5.0 or 5.0?
Both version numbers "1.5.0" and "5.0" are used to identify this release of the Java 2 Platform Standard Edition. Version "5.0" is the product version, while "1.5.0" is the developer version. The number "5.0" is used to better reflect the level of maturity, stability, scalability and security of the J2SE.

The number "5.0" was arrived at by dropping the leading "1." from "1.5.0". Where you might have expected to see 1.5.0, it is now 5.0 (and where it was 1.5, it is now 5).

5.0是产品版本号；
1.5是开发版本号；

betatoy

明白了!
謝謝! cg111