back to future collection

Java has several thread-related classes or interfaces, such as Runnable, Callable, Future, and FutureTask. They are also important concepts in Java, let's take a simple example below to learn the differences between them.Runnable Among them, Runnable should be the most familiar interface. It has only one run () function, which is used to write time-consuming operations in it,This function has no return value.. Then, you can use a Thread to execute the

Steps to use for the collection:(1) Creating a Collection Object(2) Creating an Element object(3) Adding elements to the collection(4) Traversing the collection:• Get an Iterator object from a collection object• Determine if there are elements through the Hasnext () method o

Common Collection Interface series: http://www.cnblogs.com/fengxiaojiu/p/7997704.htmlCommon Collection Class series: Http://www.cnblogs.com/fengxiaojiu/p/7997541.htmlCommon collection classes:Array (Array) the deficiencies ( namely: the difference between a collection and an array)1. The array is fixed size and cannot

Python 2.x, there are two cases of division, and if an integer is divided, the result is still an integer, and the remainder is thrown away, which is called "Floor division":>>> 10 / 33To do the exact division, you must turn one of the numbers into a floating-point number:>>> 10.0 / 33.3333333333333335In Python 3.x, all divisions are exact divisions, and the floor is represented by the addition of // : $ python3python 3.3.2 ( Default, Jan 22 2014, 09:54:4.2.1 Compatible Apple LLVM 5.0 (Clang-50

world's most powerful supercomputers are all Linux systems, the advantages of Linux system can be seen. In addition, the Linux system multi-user multitasking feature makes Linux very flexible, unlike Windows, the Linux runtime will load your maximum memory, so when you use the feeling is really faster than Windows, the Linux support dynamic Link way, The software does not need to load two times, so the feeling will run relatively smooth, in addition, Linux support multi-file format, now more co

[] args) throws Exception { Executorservice Executorservice=executors.newfixedthreadpool (3); Future3 Execute multiple call methods simultaneously, return multiple return values, who first executes who first returnsPackage Com.lipeng;import Java.util.random;import Java.util.concurrent.callable;import Java.util.concurrent.completionservice;import Java.util.concurrent.executorcompletionservice;import Java.util.concurrent.executorservice;import Java.util.concurrent.executors;public class FutureAnd

:\Users\yuqiao\Desktop\testSpider.txt ', ' a ', encoding= ' Utf-8 ') as F:f.write ("{}|{}| {}| {}| {}| {}| {}| {}| {}| {}| {}| {}| {}| {}| {}\n ". Format (Mid,name,brief,year,date,director, Writers[0],writers[1],writ ERS[2], stars[0],stars[1],stars[2],stars[3],stars[4], Picture) print (Mid) print (name) #___________________________________________________ ___ Main Function __________________________________________________________import Timewith op

widely used, we often describe an ad is very cottage, repeatedly stressed that we want to high design. Well, what do you understand about the cottage and the high is the concept: Use the advertisement Chart contrast lets everybody intuitively feel. In my opinion, there is no absolute cottage and high, only in contrast, the cottage refers to the relatively poor creativity and poor production. Let our advertising design in the industry the distinction, more ideas and thinking, aband

Build 　　Third, give the component obvious interactive feedback Cold clicks and appear often cannot attract the user's attention, therefore, when we need to strengthen certain elements to guide the user, we can give these elements with appropriate appearance effect, such as fade fade, displacement, amplification, halo, distribution and other effects, will play a good guiding effect. Dynamic design can be subtle in the instant experience, throug

Rounding, Integer roundingN-Decimal: Weighted Expansion summation method4. Data operationThe highest level in binary is the sign bitSmallest unit in computer: bit shorthand bMinimum unit of processing data in a computer: shorthand byte b5. Data type (Java is a strongly typed programming language)Basic data typesInteger typebyte short int Long is the number of bytes: 1 2 4 8Floating point TypeThe number of bytes for a float double is: 4 8Character typeThe number of bytes that char occupies is: 2

This is all about innovation, and the goal is to keep an eye on the latest technology. If you are a programmer and want to explore future technologies, this article is your must-read choice. We have a list of 10 programming languages, 10 programming languages that will change the way the IT world works. And these languages are starting to change the status quo in the IT world, let's take a look at the following: Dart language This language is made b

from $CONFNAME where file_name='$filename'; the EOF ' +year=$ (Echo$partition |Cut-B1-4) Apre_location= $PRE _location/$year theLogging INFO"get pre file location $PRE _location for $filename" + -Targ_location= ' Mysql-h$hostname-u$username-p$password $DBNAME 2>/dev/NULL|Tail-N +2 $SELECT target_location from $CONFNAME where file_name='$filename'; $ EOF ' -targ_location= $TARG _location/$partition -Logging INFO"get target file location $TARG _location for $filename" the -Targ_table_name= ' M

The command we use when using Linux is nothing more than command + options + parametersExample Shutdown-h now shutdown/is the command to shut down-h/is the option now/is the parameterMain learning File/directory operations: View, create, copy, delete, move, renameView: cd/view ls/list files for the current directory. /return to the previous layer Ls/path list files under/path ls/path-l detailed path filesExample: View Usr/local/shareExample: Back to view usr/localCreate: mkdir/CreateExample: We

the speech of a foreigner, he said he was more than 50 years old still every day to write code, understand the latest dynamics, so he can do their company's chief scientist, so it can always guide the project team forward and ensure the quality of the project. He admits that for a technician or technical team leader who does not write code and does not know the latest technological developments, the team is sufficiently contrived to work on small projects, and if the pressure and the project ar

is inferior to strongly typed language, unit test can guarantee correctness, but difficult to reconstruct.Based on the above-mentioned reasons, I don't know how the road after Node 1.0 will go? How far can we go? At present 1.0 has been some dystocia ...Recommendation: Do not use node for the core business for the time being, although PayPal claims to have done so. Make full use of node's strengths, do and interact with the front end of the work, and in a small time. If the back-end system is i

). EventName The event name. Note that, unlike AddEventListener (),The event name here has "on", such as mouse click event onclick,Mouse double-click event OnDoubleClick, mouse move into event onmouseover,Mouse move out event onmouseout, etc. Handle The event handle function, which is the function used to handle the event. Note: The event handle function refers to "function name" and cannot be enclosed with parentheses.AddEventListener () is the

Block chain in the future can be used in that field is worth the exchange of a problem, in this simple introduction to a few use scenes for more imagination 　　Digital Currency: The digital currency, represented by the Bitcoin, relies essentially on the network algorithm to generate the digital currency and go central. 　data storage: highly redundant block chains, high security, and privacy protection are especially good for storing and protectin

Recently, with Nvidia Tegra 4 game Equipment shield again ushered in OTA update, despite only 20 trillion of update package, but the home page you think this is only 20 trillion update files, has opened the mobile game and even the entire gaming industry a new era. The biggest change of OTA update is to join the grid cloud game function, is still in beta testing phase. Press the Nvidia button in the middle of the shield to find the grid icon in Tegra Zone There will be a few seconds of loading

]) 3. At present, the constant expansion of memory and the advent of grid computing provide us with the basis for designing a new database schema. 4. The new database can be considered in the following ways: The data is stored in memory rather than disk, and the speed is greatly increased; The first generation of database share memory, the second generation of share disk, the next generation should be share nothing, using the concept of grid computing, the database can be deployed on multipl

Limited energy and limited time, so I have to circle a range: 1.GIS related technology; 2. Programming Technology (VB and. NET); 3. Database technology (MSSQL); 4. Project implementation and project management, as well as related documents preparation, the future may turn to do pre-sales; 5. No matter how busy the work, we must pay attention to the development of new technologies, the reason is very simple, only to walk other people did not walk