public static void isMatch(String regex, String product)
{
    try {
        System.out.println("regex(" + regex + ") product(" + product + ")");
        Pattern pattern = Pattern.compile(regex.toLowerCase());
        Matcher matcher = pattern.matcher(product.toLowerCase());
        System.out.println(matcher.matches() ? "truen" : "falsen");
    } catch (Exception e) {
        System.out.println(e);
    }
}

public static void main(String[] args)
{
    // true ?!
    isMatch("a*.*/REGEX", "a1.0/REGEX");
    isMatch("/*.*/REGEX", "/1.0/REGEX");
    isMatch("/*.*/REGEX", "/abc/REGEX");

    // Exception as expected
    isMatch("*.*/REGEX", "1.0/REGEX");
}

## Why are these cases working?
regex(a*.*/REGEX) product(a1.0/REGEX)
true

regex(/*.*/REGEX) product(/1.0/REGEX)
true

regex(/*.*/REGEX) product(/abc/REGEX)
true

## This is what I expected to happened
regex(*.*/REGEX) product(1.0/REGEX)
java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
*.*/regex
^