whitespace

http://www.java2s.com/Tutorial/Java/0040__Data-Type/isWhitespace.htm isWhitespace():true if the argument is whitespace.

which is any one of the following characters:

space (' '), tab ('\t'), newline ('\n'), carriage return ('\r'),form feed ('\f')

public class MainClass { public static void main(String[] args) { char symbol = 'A'; if (Character.isWhitespace(symbol)) { System.out.println("true"); }else{ System.out.println("false"); } } }