com.helger.commons.lang

Interface IHasSize

All Known Subinterfaces:

ICache<KEYTYPE,VALUETYPE>, ICallbackList<CALLBACKTYPE>, ICommonsCollection<ELEMENTTYPE>, ICommonsList<ELEMENTTYPE>, ICommonsNavigableSet<ELEMENTTYPE>, ICommonsOrderedSet<ELEMENTTYPE>, ICommonsSet<ELEMENTTYPE>, ICommonsSortedSet<ELEMENTTYPE>, IErrorList, IHasByteArray, IMutableCache<KEYTYPE,VALUETYPE>

All Known Implementing Classes:

ByteArrayInputStreamProvider, ByteArrayWrapper, Cache, CallbackList, CommonsArrayList, CommonsCopyOnWriteArrayList, CommonsCopyOnWriteArraySet, CommonsHashSet, CommonsLinkedHashSet, CommonsLinkedList, CommonsTreeSet, CommonsVector, DateTimeFormatterCache, ErrorList, HttpHeaderMap, InMemoryLogger, LRUSet, NonBlockingByteArrayOutputStream, NonBlockingStack, NonBlockingStringWriter, PDTFormatter.LocalizedDateFormatCache, ReadableResourceByteArray, ReadableResourceString, RegExCache, URLParameterList

public interface IHasSize

Base interface for all objects having a certain size.

Author:

Philip Helger

Method Summary

Modifier and Type	Method and Description
boolean	isEmpty()
default boolean	isNotEmpty()
int	size()

Method Detail

size

@Nonnegative
int size()

Returns:

The number of contained elements. Always ≥ 0.

isEmpty

boolean isEmpty()

Returns:

true if no items are present, false if at least a single item is present.

See Also:

size(), isNotEmpty()

isNotEmpty

default boolean isNotEmpty()

Returns:

true if at least one item is present, false if no item is present.

See Also:

size(), isEmpty()