Character whitespace(spacing) in java

Question

how do make a scanner recognize a whitespace(spacing) so when the user enters "hello how are you" java does not throw an exception

Answer 1

Scanner uses the whitespace as default delimiter to separate inputs. It has a useDelimiter()-Method to change this. It uses Regular Expressions as delimiters, so that some characters in the String passed to the useDelimiter()-Method are interpreted as placeholders. For example, to scan a line of user input, you can use the newline-character (produced when the user presses the enter key), symbolized by the delimiter string "\\n":

Scanner sc = new Scanner(System.in);

sc.useDelimiter("\\n");

String lineInput = sc.next();