true if the booleans are equal.true if the bytes are equal.true if the characters are equal.true if the doubles are equal.true if the floats are equal.true if the integers are equal.true if the long integers are equal.true if the objects are either equal, the same
instance, or both null.true if the short integers are equal.true if the character is an upper or lower case
English letter.true if the character is a digit between 0 and 9
(inclusive).true if the string consists of only digits between 0
and 9 (inclusive).true if the object is not null, using
the rules from #isNotNull(Long) or Validator.isNotNull(String) if
the object is one of these types.true if the string is not null, meaning
it is not a null reference, nothing but spaces, or the
string "null", with zero or more leading or trailing spaces.true if the object is null, using the
rules from #isNull(Long) or Validator.isNull(String) if the object
is one of these types.true if the string is null, meaning it
is a null reference, nothing but spaces, or the string
"null", with zero or more leading or trailing spaces.