Checking whether a String contains a number value in Java [closed]

Answer 1

Looks like people like doing spoonfeeding, so I have decided to post the worst solution to an easy task:

public static boolean isNumber(String s) throws Exception {
    boolean result = false;
    byte[] bytes = s.getBytes("ASCII");
    int tmp, i = bytes.length;
    while (i >0  && (result = ((tmp = bytes[--i] - '0') >= 0) && tmp <= 9));
    return result;
}

About the worst code I could imagine, but there might be other people here who can come up with even worse solutions.

Hm, containsNumber is worse:

public static boolean containsNumber(String s) throws Exception {
    boolean result = false;
    byte[] bytes = s.getBytes("ASCII");
    int tmp, i = bytes.length;
    while (i >0  && (true | (result |= ((tmp = bytes[--i] - '0') >= 0) && tmp <= 9)));
    return result;
}