java.time.format.DateTimeParseException for dd-MMM-yyyy format [duplicate]

Answer 1

The reason is that parsing is case sensitive by default and the formatter doesn't recognize "jan". It would only recognize "Jan".

You can construct a case-insensitive parser by using a DateTimeFormatterBuilder and calling parseCaseInsensitive():

Changes the parse style to be case insensitive for the remainder of the formatter.

Parsing can be case sensitive or insensitive - by default it is case sensitive. This method allows the case sensitivity setting of parsing to be changed.

DateTimeFormatter dTF = 
    new DateTimeFormatterBuilder().parseCaseInsensitive()
                                  .appendPattern("dd-MMM-yyyy")
                                  .toFormatter();