[jdk8u-dev] RFR: 8154043: Fields not reachable anymore by tab-key, because of new tabbing behaviour of radio button groups. [v3]

[ktakakuri]

> 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

ktakakuri has updated the pull request incrementally with one additional commit since the last revision:

  Fix the copyright years

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

Changes:
  - all: https://git.openjdk.org/jdk8u-dev/pull/285/files
  - new: https://git.openjdk.org/jdk8u-dev/pull/285/files/cc8ef7ee..a1eac9d6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk8u-dev&pr=285&range=01-02

  Stats: 6 lines in 5 files changed: 0 ins; 0 del; 6 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