Reviewed-by: xdono

6959197: When building with JAVAC_MAX_WARNINGS=true, the build fails in sun/nio/cs due to the use of -Werror
Summary: Remove unneeded casts, add generic types and make better use of static data
Reviewed-by: sherman

Reviewed-by: darcy, weijun

Summary: Add new method Character.isSurrogate(char ch)
Reviewed-by: sherman, darcy, okutsu

Summary: override the canEncode() in ISO2022_CN_CNS
Reviewed-by: martin

6229811: Several codepoints in EUC_TW failed in roundtrip conversion
Summary: Re-write EUC_TW charset to address the size and roundtrip issue.
Reviewed-by: alanb