Best implementation for an isNumber(string) method

Question

In my limited experience, I\'ve been on several projects that have had some sort of string utility class with methods to determine if a given string is a number. The idea h

Answer 1

public static boolean CheckString(String myString) {

char[] digits;

    digits = myString.toCharArray();
    for (char div : digits) {// for each element div of type char in the digits collection (digits is a collection containing div elements).
        try {
            Double.parseDouble(myString);
            System.out.println("All are numbers");
            return true;
        } catch (NumberFormatException e) {

            if (Character.isDigit(div)) {
                System.out.println("Not all are chars");

                return false;
            }
        }
    }

    System.out.println("All are chars");
    return true;
}