集合框架底层数据结构总结先来看一下 Collection 接口下面的集合。ListArraylist: Object[] 数组Vector:Object[] 数组LinkedList: 双向链表(JDK1.6 之前为循环链表,JDK1.7 取消了循环)SetHashSet(无序,唯一): 基于 HashMap 实现的,底层采用 HashMap 来保存元素LinkedHashSet: LinkedHashSet 是 HashSet 的子类,并且...
Collection是一个接口,public interface Collection<E>extends Iterable<E> 对于Collection的实现类而言,有些是有序(List)的,有些是无序(Set)的。(这里的有序与无序指的是,输出数据时是否按照输入时的顺序) Set与List是继承于Collection接口的两个子接口。可以通过它们来实现Collection。 List是允许有重复元素的,Set...
interface:所有的接口 implementation:所有的实现 algorithm:static的算法 接口(interface): java collection中的接口可以分为两块,java.util.Collection 和 java.util.Map,两块的一些常用的类可以由下图概况。图中需要注意的一点是Deque实际上是Queue的subinterface java.util.Collection: java.util.Set java.util.Sorted...
Certain methods of this interface are considered "destructive" and are called "mutator" methods in that they modify the group of objects contained within the collection on which they operate. They can be specified to throw UnsupportedOperationException if this collection implementation does not support...
Collection interface, on the contracts of the iterator, add, remove, equals, and hashCode methods. Declarations for other inherited methods are also included here for convenience. 1. 2. 3. 4. 翻译: List接口在Collection接口指定的约束之外,在iterator、add、remove、equals和hashCode方法上添加了其他的...
IIterator Interface Reference Feedback Definition Namespace: Java.Util Assembly: Mono.Android.dll An iterator over a collection. C# コピー [Android.Runtime.Register("java/util/Iterator", "", "Java.Util.IIteratorInvoker")] [Java.Interop.JavaTypeParameters(new System.String[] { "E" })...
publicinterfaceComparable<T>{intcompareTo(Tt);} compareTo方法的通用约定与equals相似: 将此对象与指定的对象按照排序进行比较。 返回值可能为负整数,零或正整数,因为此对象对应小于,等于或大于指定的对象。 如果指定对象的类型与此对象不能进行比较,则引发ClassCastException异常(类转换异常)。
It was critical that all reasonable representations of collections interoperate well. This included arrays, which cannot be made to implement the Collection interface directly without changing the language. Thus, the framework includes methods to enable collections to be moved into arrays, arrays to be...
Collection Interface Why doesn't Collection extend Cloneable and Serializable? Why don't you provide an "apply" method in Collection to apply a given method ("upcall") to all the elements of the Collection? Why didn't you provide a "Predicate" interface, and related methods (e.g., a me...
types of collections allow duplicate elements, and others do not. Some are ordered and others are unordered. The Java platform doesn't provide any direct implementations of this interface but provides implementations of more specific subinterfaces, such asSetandList. Also seeThe Collection Interface...