JDK-8155052 : add notes and links to j.u.Observer/Observable deprecation comments
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.util
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2016-04-25
  • Updated: 2017-04-07
  • Resolved: 2017-03-30
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JDK 10 JDK 9
10Fixed 9 b164Fixed
Related Reports
Relates :  
JDK-8065614 - JEP 277: Enhanced Deprecation
Relates :  
JDK-8154801 - deprecate Observer and Observable
Description
In reference to deprecation of j.u.Observer/Observable, Doug Lea says,

"These days, anyone encountering these is probably hitting them
by mistake while using RxJava or other reactive-stream frameworks.
In which case, users will normally want to instead use the jdk9
java.util.concurrent.Flow APIs that all reactive-streams frameworks
should be compatible/interoperable with in their planned upcoming
jdk9-compatible versions."

http://mail.openjdk.java.net/pipermail/core-libs-dev/2016-April/040473.html

A note should be added to j.u.Observer/Observable mentioning this and pointing to the Flow APIs.
Comments
Also add a link to the beans properties/events model. Probably http://docs.oracle.com/javase/8/docs/technotes/guides/beans/index.html In particular, the JavaBeans specification chapter 6 covers the beans event model. Also, the JavaBeans trail of the Java Tutorial (linked from that page) has a section "Events" within the "Writing JavaBeans Components" chapter. UPDATE: the technotes/guides stuff is in flux, so adding a link to it will probably be broken immediately. The existing doc mentions java.beans, whose package doc has more information and links (albeit broken ones) so that's probably sufficient for now.
29-03-2017