Useful java safe comparison helper functions

NullSafe.java

private static boolean safeEquals(Integer first, Integer second) {
	return (first == null && second == null) || (first != null && first.equals(second));
}

private static boolean safeContains(String str, String substr) {
	return str != null && str.contains(substr);
}

private static <K> List<K> safe(List<K> list) {
	return list != null ? list : Collections.EMPTY_LIST;
}