how to find escape character \ in a string?

Please consider following code:

public static void main(String... args) {

        int count = 0;
        Pattern pattern = Pattern.compile("X");
        Matcher matcher = pattern.matcher("5\\yeyyyyyyy");
        while (matcher.find()) {
            count++;
            System.out.println(matcher.start()+"..."+matcher.group());
        }
        System.out.println("The total number of occurrences "+count);

    }

1) If I write x=5 in above program then I get following output:

0...5
The total number of occurrences 1

So I got information that 5 is at 0 index and it is only one time in the given string.

2) Similary We know that // is at 1 index and it is only one time in the given string. How can I get this as output?

I am trying to write

x=// 

I am getting compile time error.

I hope I made you guys understood of my point. Thanks