public static <T> boolean isInSet(T value, T... set) {
for (T i : set) {
if (i.equals(value)) {
return true;
}
}
return false;
}
public static <T extends CharSequence> T notEmpty(T chars, String message, Object... values) {
message = String.format(message, values);
if (chars == null) throw new NullPointerException(message);
if (chars.length() == 0) throw new IllegalArgumentException(message);
return chars;
}