[jdk8u-dev] RFR: 8154043: Fields not reachable anymore by tab-key, because of new tabbing behaviour of radio button groups. [v5]

[Kazuhisa Takakuri]

> This is a backport of JDK-8154043: Fields not reachable anymore by tab-key, because of new tabbing behaviour of radio button groups.
> 
> Applying the JDK-8154043 fix as is will result in a regression of JDK-8182577.
> The fix of JDK-8182577 adds an interface for JDK10, therefore this fix cannot be backported simply for JDK8u.
> So, I propose to judge the buttonModel is an instance of DefaultButtonModel.
> 
> Testing:
> java/awt
> javax/swing
> ButtonGroupLayoutTraversalTest.java
> bug8033699.java
> DefaultButtonModelCrashTest.java
> on Windows x86_64

Kazuhisa Takakuri has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Merge branch 'master' into 8154043
 - Backport 8d81ec63b2bafc431cbb8572a3e45e76580ab46f
 - Backport 8d81ec63b2bafc431cbb8572a3e45e76580ab46f
 - Fix the copyright years
 - Merge branch 'openjdk:master' into 8154043
 - Chmod ButtonGroupLayoutTraversalTest
 - Chmod DefaultButtonModelCrashTest
 - Fix the copyright year
 - Backport f3abf05b31893b9a066a436e2c4a587f8899ab10
 - Backport 8d81ec63b2bafc431cbb8572a3e45e76580ab46f

-------------

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/285/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/285/files/7bee28de..004551a0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=03-04

  Stats: 969497 lines in 1962 files changed: 916695 ins; 46253 del; 6549 mod
  Patch: https://git.openjdk.org/jdk8u-dev/pull/285.diff
  Fetch: git fetch https://git.openjdk.org/jdk8u-dev.git pull/285/head:pull/285

PR: https://git.openjdk.org/jdk8u-dev/pull/285