Best way to verify string is empty or null

Question

i am sure this must have been asked before in different ways - as isEmptyOrNull is so common yet people implement it differently. but i have below curious query in terms of

Answer 1

With the openJDK 11 you can use the internal validation to check if the String is null or just white spaces

import jdk.internal.joptsimple.internal.Strings;
...

String targetString;
if (Strings.isNullOrEmpty(tragetString)) {}