Best practice to validate null and empty collection in Java

Question

I want to verify whether a collection is empty and null. Could anyone please let me know the best practice.

Currently, I am checking as below:

Answer 1

That is the best way to check it. You could write a helper method to do it:

public static boolean isNullOrEmpty( final Collection< ? > c ) {
    return c == null || c.isEmpty();
}

public static boolean isNullOrEmpty( final Map< ?, ? > m ) {
    return m == null || m.isEmpty();
}