Web Reference: Provides utility methods and decorators for Collection instances. Various utility methods might put the input objects into a Set/Map/Bag. In case the input objects override Object.equals(Object), it is mandatory that the general contract of the Object.hashCode() method is maintained. Jun 5, 2015 · 9 Many advice to use CollectionUtils.isNotEmpty(coll) rather then coll != null in the below use case also. Jan 8, 2024 · We went through some of the commonly used methods of CollectionUtils – which is very much useful to avoid boilerplate when we’re working with collections in our Java projects.
YouTube Excerpt: Empty check sub collection check with Apache commons
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