useDelimiter() printing empty space

I have a string, String url = "www.public.website.edu/~JohnSmith/JAVA000";. I aim to use delimiters to get the desired output as shown below.

I do kinda get the ouput, but there seems to be an extra line that's printed and I'm not entirely sure where it comes from.

Code:

	public static void main(String[] args) {
		String url = "www.public.website.edu/~JohnSmith/JAVA000";
		Scanner scan = new Scanner(url);
		scan.useDelimiter("[./~]");
		while (scan.hasNext()) {
			System.out.println(scan.next());
		}

Actual:

www
public
website
edu

JohnSmith
JAVA000

Expected:

www
public
website
edu

JohnSmith
JAVA000

I'm not entirely sure where my regex syntax is going wrong.

next will keep reading the string you gave the scanner, until a delimiter is found, and return the string that is read.

Let's see what happens just after the scanner has read edu. The scanner's position is now at:

www.public.website.edu/~JohnSmith/JAVA000
                      ^

It starts reading by going to the next character. It sees that the next character ~ is also a delimiter, as it matches the [./~] regex, so it stops here. What non-delimiter character has the scanner read? None! So next returns an empty string, and you print that empty string, which causes the empty line to appear.

If you don't like the empty line, you can specify that a delimiter is one or more of the characters in [./~] by using the + quantifier:

scan.useDelimiter("[./~]+");

This way, /~ is treated as one delimiter, rather than 2 separate ones.