paddingChar

The character that is used when padding encoded output. This is used by Decoder.Feed to mark input as "completing" such that further non-padding input can be exceptionally rejected with a MalformedEncodingException. If the encoding specification does not use padding, null may be specified.

NOTE: Decoder.Feed will not pass along padding characters to the Decoder.Feed implementation; they will be automatically dropped. If this is undesirable, consider specifying null and managing it in the implementation.