The root interface in thecollection hierarchy. A collection represents a group of objects, known as itselements. Some collections allow duplicate elements and others do not. Some are ordered and others unordered. The JDK does not provide anydirectimplementations of this interface: it provides impleme...
*/public interface Collection<E> extends Iterable<E> { intsize(); booleanisEmpty(); booleancontains(Object o); Iterator<E>iterator();// 以数组的形式返回Collection中所有对象,如果Collection实现类是有序的,返回的该数组也应该同样的有序;// 返回的数组必须保证当前Collection对象对该数组没有任何引用,也...
AI代码解释 *The rootinterfaceinthecollection hierarchy.Acollection*represents a groupofobjects,knownasitselements.Some*collections allow duplicate elements and othersdonot.Some are ordered*and others unordered.TheJDKdoes not provide anydirect*implementationsofthisinterface:it provides implementationsofmore*speci...
mutability distinctions in its interface hierarchy, no longer believes it is a viable approach, based on user experience with his collections package. In his words (from personal correspondence) "Much as it pains me to say it, strong static typing does not work for collection interfaces in Java...
Java Iterator interface is used to iterate over the elements of a Collection (List, Set or Map). The Iterator helps in retrieving the elements from the specified collection one by one and optionally performs operations over each element. Java Iterator was first introduced in Java 1.2 as a repl...
public interfaceCollection<E>extendsIterable<E> The root interface in thecollection hierarchy. A collection represents a group of objects, known as itselements. Some collections allow duplicate elements and others do not. Some are ordered and others unordered. The JDK does not provide anydirectimplem...
interface:接口 implements:实现 exception:异常 Runtime:运行时 ArithmeticException:算术异常 ArrayIndexOutOfBoundsException:数组下标越界异常 NullPointerException:空引用异常 ClassNotFoundException:类没有发现异常 NumberFormatException:数字格式异常(字符串不能转化为数字) ...
public interface Collection<E> extends Iterable<E>The root interface in the collection hierarchy. A collection represents a group of objects, known as its elements. Some collections allow duplicate elements and others do not. Some are ordered and others unordered. The JDK does not provide any ...
Java Collection Interface TheCollectioninterface is the root interface of the collections framework hierarchy. Java does not provide direct implementations of theCollectioninterface but provides implementations of its subinterfaces likeList,Set, andQueue. To learn more, visit:Java Collection Interface ...
The root interface in the collection hierarchy. C# 复制 [Android.Runtime.Register("java/util/Collection", "", "Java.Util.ICollectionInvoker")] [Java.Interop.JavaTypeParameters(new System.String[] { "E" })] public interface ICollection : IDisposable, Java.Interop.IJavaPeerable, Java.Lang....