The java.text.Collator functionality is behind the Unicode standard. Sorting data in Collation_xx.properties are behind the specification of Unicode standard. xx here is mainly for asian locale. So far, the locale which has been checked is zh_CN. The sorting data in java for zh_CN is only a childset of unicode standard. The sorting oder in unicode standard can be regarded as a newer version or superset of java's.

To make java's Collator has the latest funcationality as IBM, microsoft, the file j2se/src/share/classes/sun/text/resources/
CollationData_xx.java needs to be updated. There is no need for EU locales, but should be necessary for CCJK. The latest sorting data in unicode standard is at http://unicode.org/cldr/data/common/collation/

please also refer to 6414006