On page
http://java.sun.com/j2se/1.4.1/docs/guide/intl/encoding.doc.html
the section "Extended Encoding Set (contained in lib/charsets.jar) - Supported by java.nio, java.io and java.lang APIs" shows numerous canonical names that are correct for java.nio APIs, but not for java.io.

Canonical names are visible through the methods java.io.InputStreamReader.getEncoding and java.io.OutputStreamWriter.getEncoding. These methods intentionally still return the old names as documented in
http://java.sun.com/j2se/1.4/docs/guide/intl/encoding.doc.html and earlier.

The page either has to use separate lists for java.nio and java.io/java.lang APIs, or use separate columns to show old and new canonical names side by side.