<i18n dev> RFR: JDK-8315946: DecimalFormat and CompactNumberFormat do allow U+FFFE and U+FFFF in the pattern

[Justin Lu]

Please review this change which adjusts the pattern syntax specification for the two classes to represent the actual behavior. That is, U+FFFE and U+FFFF are allowed in the suffix/prefix. (Additionally; 'Unicode' is dropped from the definitions, as a Java character is composed of Unicode code points).

See code below, no exception is thrown.


String uFFFE = "\uFFFE";
String uFFFF = "\uFFFF";
var a = new DecimalFormat("prefixStart"+uFFFE+"0.00"+uFFFF+"SuffixEnd");
a.format(1); // returns "prefixStart￾1.00￿SuffixEnd"
var b = new CompactNumberFormat(a.toPattern(), a.getDecimalFormatSymbols(), new String[] {""});
b.format(1); // returns "prefixStart￾1￿SuffixEnd"

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Commit messages:
 - Include link in DecimalFormat
 - Drop 'Unicode', as it is implied
 - init

Changes: https://git.openjdk.org/jdk/pull/15648/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15648&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315946
  Stats: 8 lines in 2 files changed: 2 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/15648.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15648/head:pull/15648

PR: https://git.openjdk.org/jdk/pull/15648