1.
http://java.sun.com/j2se/1.5.0/ja/install-docs.html still have beta2.

????????? Java 2 Platform Standard Edition 5.0 ?????????????????
?:???????????????????????????? JDK ??????????????????????????

      <version>

???? 1.5.0 Beta 2 ????????????

      unzip jdk-1_5_0-<version>-doc.zip

???????????????????

      unzip jdk-1_5_0-beta2-doc.zip


2. http://java.sun.com/j2se/1.5.0/ja/relnotes.html#introduction
still shows J2SE 1.5 Beta 2 API

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