Java

Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given [100, 4, 200, 1, 3, 2] ,The longest consecutive elements sequence is [1, 2, 3, 4] . Return its length: 4 .Your algorithm should run

/*** * binary search Algorithm * * * *@paramSrcarray ordered Array * *@paramTarget Find element * *@returnSrcarray array subscript, not found return-1*/ Public intBinarySearch (int[] Srcarray,inttarget) { intleft = 0; intright =

First, head, Get,post request Way main differenceHead only requires the server to return the header field of the HTTP response message The first is that "get-committed data can be up to 1024 bytes" because get commits data through a URL, so

In all the weeks, when the Java neutron class overrides the parent class method, if the parent throws an exception, the subclass must also throw the parent class's exception or subclass of the exception.The following code is used to demonstrate this

In fact, at first I was rejecting Java. But I found out that the company developed Java, and then some of the ' big Data ' tools were written by Java. So Duang, I started the Java tour again ... This article describes the development environment

Import Java.io.File;Import java.io.IOException;Import Javax.xml.parsers.DocumentBuilder;Import Javax.xml.parsers.DocumentBuilderFactory;Import javax.xml.parsers.ParserConfigurationException;Import Javax.xml.transform.Transformer;Import

Spring does not have a few broken frames for people to download and use, but the official website has everything, there is no download link. Java programmers were raped by those garbage frames, still enjoying, what ssh, wow! Java seems to be working

/* Internal class Access features: 1, the inner class can access members in the outer class directly. 2, an external class must establish an inner class object to access the inner class. A design for the class. When analyzing a thing, it is found

Decoration mode: modifier Mode Decoration mode, also known as Wrapper Mode The decoration mode extends the object functions in a transparent way to the client. It is an alternative to the inheritance relationship. The decoration mode dynamically

Struts2 + Ajax checks whether the user name is unique. After two days, I finally figured out how to use Ajax in the Struts2 framework to detect the existence of user names. Although the speed is really slow compared to those of the experts, it is

Java keywords: this, super usage summary, uperAuthor: lavaDate: 2007-03-01MSN: leizhimin@126.comStatement: original works are reprinted without authorization!I haven't summarized my knowledge for a long time and found that many of them are

Use Ajax to verify the user name and ajax to verify the user name Ajax is a very important technology. The following is a brief example to explain how to use Ajax. The procedure is as follows:Use Ajax to verify the user nameUse the onBlur event of

JAVA static code block and java static code Feature: it is executed with the class loading, and will only be executed once, and it takes precedence over the main function.Used to initialize a class. /* Static code block format: static {execution

Payment Chinese garbled java There are too many php files on the Internet, and java cannot be found at all. After testing for a few days, this works. Pay attention to the red text below.   /*** Order a product * @ Param mm * @ Return */ @

JavaNIO principle (including code) and comparison with synchronous blocking IO and pseudo asynchronous IO I. synchronous blocking IO BIO is a blocking IO. For multi-client connections in network communication, the Server Always processes each client

BF and KMP Algorithms for string mode matching This article briefly describes the string pattern matching. This article mainly describes BF algorithm and KMP algorithm. We strive to make it clear and concise. BF algorithm The core idea is: for the

Java uses the lock sequence to avoid deadlocks Content: avoid deadlocks by obtaining the lock sequence. For example, if two users transfer funds in a bank account and synchronized Nesting is used, the deadlock may easily occur. Now we use the

Design Mode-simple factory Mode Simple factory mode in Design Mode Reading and learning the design mode. The source of the book is "big talk design mode". How to Design the program? In the book "big talk", the simple factory model is illustrated by

Java uses read-write locks to encapsulate Map Content: Uses ReentrantReadWriteLock to wrap the Map so that it can be securely shared among multiple read threads, and it can still avoid "read-write" or "Write-write" conflicts. Remember that in the

Java multithreading SummaryPreface Life's a climb, but the view is great. 1. Three ways to create a thread 1.1 inherit from Thread 1.2 Runnable1.3 Callable 2. thread status2.1 Five statuses: creation, ready, running, blocking, and death 2.2