Please review this PR and [CSR](https://bugs.openjdk.org/browse/JDK-8315148) which is a conformance change to specify exceptions in java.text.ChoiceFormat.
Makes `IllegalArgumentException` apparent for `applyPattern` and `setChoices`, as well as for the associated constructors that call the methods. This change also improves the error message for the `setChoices` IAE. ------------- Commit messages: - Include constructor + grab exceptions from 'pull/15392' - init Changes: https://git.openjdk.org/jdk/pull/15473/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15473&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8314925 Stats: 9 lines in 1 file changed: 8 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/15473.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/15473/head:pull/15473 PR: https://git.openjdk.org/jdk/pull/15473
