The JDK 9 release includes support for Unicode 8.0.
Since the release of JDK 8, which supported Unicode 6.2.0, the Unicode 8.0 introduced the following new features that are now included in JDK 9:

  - 10,555 new characters
  - 42 new blocks
  - 29 scripts

- 10,555 new characters;
Includes Georgian Lari currency symbol.
Two newly adopted currency symbols: Manat, used in Azerbaijan & Ruble, used in Russia and other countries.

- 29 new scripts :
 Ahom
 Anatolian Hieroglyphs
 Bassa Vah
 Caucasian Albanian
 Duployan
 Elbasan
 Grantha
 Hatran
 Khojki
 Khudawadi
 Linear A
 Mahajani
 Manichaean
 Mende Kikakui
 Modi
 Mro
 Multani
 Nabataean
 Old Hungarian
 Old North Arabian
 Old Permic
 Pahawh Hmong
 Palmyrene
 Pau Cin Hau
 Psalter Pahlavi
 Siddham
 Sutton SignWriting
 Tirhuta
 Warang Citi

 - 42 new blocks which includes 29 blocks for the new scripts listed above and 13 blocks for the following existing scripts:
 Cherokee Supplement
 CJK Unified Ideographs Extension E
 Combining Diacritical Marks Extended
 Coptic Epact Numbers
 Early Dynastic Cuneiform
 Geometric Shapes Extended
 Latin Extended-E
 Myanmar Extended-B
 Ornamental Dingbats
 Shorthand Format Controls
 Sinhala Archaic Numbers
 Supplemental Arrows-C
 Supplemental Symbols and Pictographs