what does scanner.next do code example

Example: java scanner next()

String s = "Hello World! 3 + 3.0 = 6 ";

      // create a new scanner with the specified String Object
      Scanner scanner = new Scanner(s);

      // find the next token and print it
      System.out.println("" + scanner.next()); // "Hello"

      // find the next token and print it
      System.out.println("" + scanner.next()); // "World!"

      // close the scanner
      scanner.close();