Java – lastindexof() finds the last alphanumeric character

I have a string in which I need to find the last alphanumeric character No matter what the last alphanumeric character in the string is, I want that index about

text="Hello World!- "

The output will be the index of'd '

text="Hello02,"

The output will be an index of '2' I know I can do it in a "brute force" way, check each letter and number and find the highest index, but I'm sure there's a simpler way to do it, but I can't find it

Solution

This will work as expected, and it can even work on almost all Unicode characters and numbers:

public static final int lastAlphaNumeric(String s) {
    for (int i = s.length() - 1; i >= 0; i--) {
        char c = s.charAt(i);
        if (Character.isLetter(c) || Character.isDigit(c))
            return i;
    }
    return -1; // no alphanumeric character at all
}

It is also much faster than other answers;)