[jcranmer]

What would you say Java is missing? Sure, it does have the "oops, we implemented Unicode when they said we only needed 16 bits problem" but unlike, say, JS, it actually handles astral plane characters well (e.g., the regex implementation actually says that . matches an astral plane code point rather than half of one).

It does have all the major Unicode annexes--normalization (java.text.Normalizer), grapheme clusters (java.text.BreakIterator), BIDI (java.text.Bidi), line breaking (java.text.BreakIterator), not to mention the Unicode script and character class tables (java.lang.Character). And, since Java 8, it does have a proper code point iterator over character sequences.

[paulddraper]

I stand corrected. Java 8 has everything you could expect.