Reading Input

• Construct Scanner from input stream (e.g. System.in)
  Scanner in = new Scanner(System.in)
  
• nextInt, nextDouble reads next int or double
  int n = in.nextInt();
  
• hasNextInt, hasNextDouble test whether next token is a number
• next reads next string (delimited by whitespace)
• nextLine reads next line
  

• Ch1/input/InputTester.java