iterator interface

Execution: for (iterator it = o.getsons (). iterator (); It.hasnext ();) { R = (Knowledgenode) it.next (); It.remove ();  If replaced by O.getsons (). Remove (R); Will throw out the abnormal concurrentmodificationexception. There is an exception,

The Java.util package contains a series of important collection classes. This article will start with the analysis of the source, in-depth study of the internal structure of a collection class, as well as traversing the collection of iterative mode

The Java.util package contains a series of important collection classes. This article will start with the analysis of the source, in-depth study of the internal structure of a collection class, as well as traversing the collection of iterative mode

Java Source Analysis: In-depth discussion of iterator mode The Java.util package contains a series of important collection classes. This article will start with the analysis of the source, in-depth study of the internal

Iterator (iterator) mode, which provides an abstraction on a common process: an iteration over a set of objects (or scalars) that are located in an unknown part of the object graph. There are several different ways to execute an iteration: Iterate

foreach traversal arrays are common, and foreach can also traverse objects Do the following tests: Class I {public $a = ' a '; protected $b = ' B '; Private $c = ' C '; Private $data = Array (' Fantasy ', ' windows ', ' Linux '); Internal

The system has organized a bit of questions about Java, including Basic, Javaweb, frame, database, multi-threaded, concurrent articles, algorithms and so on, updated in succession. Other aspects such as the front end and so on the face of the

Comparison of enumeration and iterator Enumeration interface Iterator interface Meaning of the parameter Enum type Iterator element type Package Java.util Parent class

first, the Java Basic article-concept1. Describe the Linux you know:Linux originated in 1991, 1995 popular free operating system, currently, Linux is the mainstream server operating system, widely used in the Internet, cloud computing, smart phones (

This article is transferred from hope900 blog, if there is infringement, please inform the deletionBlog links are as follows: https://blog.csdn.net/hope900first, the Java Basic article-concept1. Describe the Linux you know:Linux originated in 1991, 1

First, the problem descriptionWords not much to say, first on the code: Public Static voidMain (string[] args)throwsinterruptedexception {List list =NewArraylist();List.add ("0th one"); List.add ("The first one"); List.add ("The second One");

ContainerA collection of-collection storage objects; Map table for storing key-value pairs-iterator (iterator mode)-collection accessor, which iterates through the objects in the collection-All container classes that implement the collection

21. The difference between ArrayList and vectorsThese two classes all implement the list interface (the list interface inherits the collection interface), they are all ordered collections, that is, the location of the elements stored in these two

one, set and array arrays , which can store basic data types, are a container for storing objects, but the lengths of the arrays are fixed and are not suitable for use when the number of objects is unknown. The length of the collection (which

So, in order to prevent such information from appearing, when I use foreach, I will force type conversion of the parameters, the situation is as follows: foreach ((array) $arr as $key => $value); This has been a peaceful thing, just a few days ago,

After so many years of study, I found a problem, as if teachers are very fond of roll call, even the roll call has become some of the teacher's hobby, a day does not call, on the food does not smell, sleep is not good, I feel very strange, your

Linear table, linked list, collection, hash table is a commonly used data structure, in the Java development, JDK has provided us with a series of corresponding classes to achieve the basic data structure. These classes are in the Java.util package.

is a variable-length array implementation of the list interface. Implements all the list interface operations and allows the storage of null values. In addition to not synchronizing, ArrayList is basically equivalent to vector. Almost all methods

-------Android Training, Java training, look forward to communicating with you! ----------I. Set-up SystemObject-oriented language is the embodiment of things in the form of objects, so in order to facilitate the operation of multiple objects, the

Sometimes it is really troublesome to write more variables, and a lot of tedious and similar repetitive work, es6 provides us with a variety of more convenient forms of declaring variables-deconstruct and assignment of variables. The following