Java - Take any char one by one input from the Scanner

Question

I want check all char one by one without use ENTER char. For example I put foobar.

and I check f, fo, foo, foob, fooba, foobar and foobar. and when I find a dot I exit program

Scanner input = new Scanner(System.in);
String phrase = null;
do{
   mychar = input...???;
   System.out.println(phrase);
} while(mychar!='.');
input.close();