The split() method in Java does not work on a dot (.) [duplicate]
java.lang.String.split splits on regular expressions, and . in a regular expression means "any character".
Try temp.split("\\.").
The documentation on split() says:
Splits this string around matches of the given regular expression.
(Emphasis mine.)
A dot is a special character in regular expression syntax. Use Pattern.quote() on the parameter to split() if you want the split to be on a literal string pattern:
String[] words = temp.split(Pattern.quote("."));