collection toarray

Title: Problems When arraylist uses toarray () to construct an array Keywords: toarray construct an array Author: jrq Abstract: solves the problem of constructing an Array Using arraylist. toarray. Make a memo. Link: http://blog.csdn.net/jrq/

1 PackageP2;2 3 Importjava.util.ArrayList;4 Importjava.util.Arrays;5 Importjava.util.List;6 7 Public classToArray {8 9 Public Static voidMain (string[] args) {Ten One /* A * Set -to-go array - * The ToArray method in the

In the process of looking at the code, see this usage Fnlist.toarray (new string[0]) Very confused, do not know what this is doing, on the Internet search the following. http://rogerfederer.iteye.com/blog/788795 public t[] ToArray (t[] a) {if

The method can create an array with all the objects in the Set collection. Syntax 1 generates an array of the same length, based on the size of the set collection, which contains all the contents of the set collection.ToArray () The example

Collection frame: ★★★★★, a container for storing data.Characteristics:1: Objects encapsulate data, and objects need to be stored. Collection is used to store objects.2: The number of objects determines the array can be used, but is not sure what to

This article from: http://blog.csdn.net/xuejianwu/article/details/6931926X. Conversion operatorsConversion operators are used to implement the ability to convert the type of an input object into a sequence. The conversion method whose name starts

Collection interface of collection framework, Collection framework The Root Interface in the Collection hierarchy. Collection represents a group of objects, also known as collection elements. Some collections allow repeated elements, while

1. ArrayList's sublistThe result can not be strongly turned into ArrayList, otherwise throw classcastexception exception, because Sublist returned is ArrayList's inner class sublist, not ArrayList, but a view of ArrayList. Example Public class

Original works, can be reproduced, but please mark the source address: http://www.cnblogs.com/V1haoge/p/7229478.html1. OverviewJava's collection Class library is very rich, encompassing most of the common data structure forms, allowing us to have a

　　The collection framework (Collection framework) is one of the most powerful subsystems in Java and is located in the Java.util package. The collection framework is a complex interface and class hierarchy that provides the latest technology for