How do I check if a Java String contains at least one capital letter, lowercase letter, and number?

Question

I know that I could do this with a series of for loops that iterate through the string but that would be terrible programming. Well, my professor prefers I don\'t do it this

Answer 1

you can use :

public static boolean isTextContainUpperCase(String text) {
       if (StringUtils.isEmpty(text)) {
              return false;
       }
       return !text.equals(text.toLowerCase());
}