@Test public void testAll() throws Exception { boolean allPositive = CollectionHelper.all(testCollection, new Predicate<Integer>() { @Override public boolean apply(Integer object) { return object >= 0; } }); assertTrue(allPositive); boolean allLargerThan5 = CollectionHelper.all(testCollection, new Predicate<Integer>() { @Override public boolean apply(Integer object) { return object > 5; } }); assertFalse(allLargerThan5); }
public static <T> boolean all(Collection<T> items, Predicate<T> predicate) { if (isEmpty(items)) { return false; } for (T item : items) { if (!predicate.apply(item)) { return false; } } return true; }
CollectionHelper { public static <T> boolean all(Collection<T> items, Predicate<T> predicate) { if (isEmpty(items)) { return false; } for (T item : items) { if (!predicate.apply(item)) { return false; } } return true; } }
CollectionHelper { public static <T> boolean all(Collection<T> items, Predicate<T> predicate) { if (isEmpty(items)) { return false; } for (T item : items) { if (!predicate.apply(item)) { return false; } } return true; } private  CollectionHelper(); }
CollectionHelper { public static <T> boolean all(Collection<T> items, Predicate<T> predicate) { if (isEmpty(items)) { return false; } for (T item : items) { if (!predicate.apply(item)) { return false; } } return true; } 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 <T> boolean all(Collection<T> items, Predicate<T> predicate) { if (isEmpty(items)) { return false; } for (T item : items) { if (!predicate.apply(item)) { return false; } } return true; } 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; }