0x4380

public static String filterInput(String input, String type) {
    switch (type) {
        case "numeric":
            return filterNumeric(input);
        case "alphanumeric":
            return filterAlphanumeric(input);
        case "other":
            return filterOther(input);
        default:
            throw new IllegalArgumentException("Invalid type specified.");

0x4380

public static void filterNullBytes(String input) {
    byte[] inputBytes = input.getBytes(StandardCharsets.UTF_8);
    for (byte b : inputBytes) {
        if (b == 0x00) {
            throw new IllegalArgumentException("Input contains nullbyte character, which is not allowed.");
        }
    }
}