Why should a Comparator implement Serializable?

Question

New to Java. Learning it while working on an Android app. I am implementing a Comparator to sort a list of files and the android docs say that a Comparator should implement Seri

Answer 1

i have seen in Java 5 API Link to java 5 APT which stated that by implementing Comparator doesn't mean to implement Serializable interface anyways, so one has to explicitly pay attention to get Serializable in some customarily created Comparator class