<i18n dev> RFR: 8333456: CompactNumberFormat integer parsing fails when string has no suffix [v2]

[Justin Lu]

> Please review this PR which handles incorrect CompactNumberFormat integer only parsing when there is no suffix.
> 
> See the following snippet,
> 
> 
> var fmt = NumberFormat.getCompactNumberInstance(Locale.US, NumberFormat.Style.SHORT)
> fmt.setParseIntegerOnly(true)
> fmt.parse("5K") // returns 5000
> fmt.parse("50.00") // returns 50
> fmt.parse("5") // unexpectedly throws StringIndexOutOfBoundsException 
> fmt.parse("5 ") // returns 5
> 
> 
> Within the `parse` method, there is code that advances `position` past the fractional portion to find the suffix when `parseIntegerOnly()` is true. However, if a valid string input is given with no suffix, `DecimalFormat.subparseNumber()` will fully iterate through the string and `position` will be equal to the length of the string, throwing StringIndexOutOfBoundsException when `charAt` is invoked (line 1740).
> 
> We should check to make sure position does not exceed the string length before deciding to check for a decimal symbol.

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

  move test to existing test file

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/19533/files
  - new: https://git.openjdk.org/jdk/pull/19533/files/b6bb7e56..accb1850

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19533&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19533&range=00-01

  Stats: 93 lines in 2 files changed: 24 ins; 68 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/19533.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19533/head:pull/19533

PR: https://git.openjdk.org/jdk/pull/19533