throwException
Throws an exception appropriate to the result described by this object.
Throws
If this object is .UNDERFLOW
If this object is .OVERFLOW
If this object represents a malformed-input error; the exception's length value will be that of this object
If this object represents an unmappable-character error; the exception's length value will be that of this object
MalformedInputException if this object represents a malformed-input error; UnmappableCharacterException if this object represents an unmappable-character error