@Test public void testIsEmpty() throws Exception { boolean isTestCollectionEmpty = CollectionHelper.isEmpty(testCollection); assertFalse(isTestCollectionEmpty); boolean isNullEmpty = CollectionHelper.isEmpty(null); assertTrue(isNullEmpty); boolean isNewArrayListEmpty = CollectionHelper.isEmpty(new ArrayList()); assertTrue(isNewArrayListEmpty); }
public static boolean isEmpty(Collection items) { return items == null || items.size() == 0; }
CollectionHelper { public static boolean isEmpty(Collection items) { return items == null || items.size() == 0; } }
CollectionHelper { public static boolean isEmpty(Collection items) { return items == null || items.size() == 0; } private  CollectionHelper(); }
CollectionHelper { public static boolean isEmpty(Collection items) { return items == null || items.size() == 0; } private  CollectionHelper(); static List<T> filter(Collection<T> items, Predicate<T> predicate); static T first(Collection<T> items, Predicate<T> predicate); static T firstOrNull(Collection<T> items, Predicate<T> predicate); static int firstIndexOf(Collection<T> items, Predicate<T> predicate); static boolean any(Collection<T> items, Predicate<T> predicate); static boolean all(Collection<T> items, Predicate<T> predicate); static boolean isEmpty(Collection items); static T single(Collection<T> items, Predicate<T> predicate); static T singleOrNull(Collection<T> items, Predicate<T> predicate); static int singleIndexOf(Collection<T> items, Predicate<T> predicate); static int count(Collection<T> items, Predicate<T> predicate); static List<TResult> map(Collection<TSource> items, Mapper<TSource, TResult> mapper); }
CollectionHelper { public static boolean isEmpty(Collection items) { return items == null || items.size() == 0; } private  CollectionHelper(); static List<T> filter(Collection<T> items, Predicate<T> predicate); static T first(Collection<T> items, Predicate<T> predicate); static T firstOrNull(Collection<T> items, Predicate<T> predicate); static int firstIndexOf(Collection<T> items, Predicate<T> predicate); static boolean any(Collection<T> items, Predicate<T> predicate); static boolean all(Collection<T> items, Predicate<T> predicate); static boolean isEmpty(Collection items); static T single(Collection<T> items, Predicate<T> predicate); static T singleOrNull(Collection<T> items, Predicate<T> predicate); static int singleIndexOf(Collection<T> items, Predicate<T> predicate); static int count(Collection<T> items, Predicate<T> predicate); static List<TResult> map(Collection<TSource> items, Mapper<TSource, TResult> mapper); static final int NOT_FOUND_INDEX; }