IHasSize (ph-commons 11.1.0 API)

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, MappedCache, 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
  
  All Methods Instance Methods Abstract Methods Default Methods
  Modifier and Type Method 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()