Java

I. Theoretical preparationWhy is the KMP algorithm faster than the traditional string matching algorithm? The KMP algorithm can omit the number of characters to be matched by analyzing the pattern string and calculating the mismatch of each position

Overview Java in the 1.5 version of the introduction of annotation annotation, also known as Java Annotations, annotation is a syntax metadata, can be directly used in the source code, class/Method/variable/parameter/package name can be annotated.

Often on the go, about notify and Notifyall in Java, people often have the following statements: Notify only notifies a waiting object, and Notifyall notifies all waiting objects, and all objects continue to run And it seems that there are

1 . The exception chain is provided in the Java construction method. That is, we can use the construction method to continuously concatenate the anomaly into an abnormal chain ... The reason why you need an exception is because of the

Description: The following code is implemented based on httpclient4.5.2. We want to use Java's httpclient implementation GET request Crawl page is a relatively easy to achieve work: public static String get (string url)

Although there are already two standard parsing methods for DOM and sax in Java But it is not easy to operate, for a beginner like me, part of the code is living nausea To this end, the great third party development team developed jdom and DOM4J

Question Description: A round Table sits 5 philosophers, two of whom have a chopstick, and a table with noodles in the middle. Philosophers think about the problem, when hungry to pick up about two chopsticks to eat, must get two chopsticks to eat.

How to use :Import Kaptcha-2.3.jar package in ProjectAdd in Web.xml : Copy Code code as follows: Kaptcha com.google.code.kaptcha.servlet.KaptchaServlet kaptcha.producer.impl com.google.code.kaptcha.impl.defaultkaptcha

This article to undertake a previous article "Java multithreaded Examples (i)." Four. Java multi-thread blocking state and line program control system Several specific types of Java blocking have been mentioned above. See below for the main

Copy Code code as follows: Import java.awt.*; Import java.awt.event.*; Import Java.util.Calendar; Import Javax.swing.JOptionPane; Class Calendarbean {//define a calendar classString day[]; Array of Daysint year = month = 9; Given an

Copy Code code as follows: /* * Test Rounding */ Package com.icer.test; /** * * @author Hanbin */ public class Myround { public static void Main (string[] args) { Double num = 3.23562; Double number = 0; Number = new Myround ().

Copy Code code as follows: Public httpservletresponse Download (String path, httpservletresponse response) { try { Path refers to the paths of files that you want to download. File File = new file (path); Gets the file name. String

Objective A closure (closure) is a callable object that records information from the scope in which it was created. By this definition, you can see that the inner class is an object-oriented closure because it contains not only information about

There are often tasks in the project that need to be asynchronous (submitted to the thread pool) to execute, and the main thread often needs to know the results of the asynchronous execution. Using runnable is not possible, we need to use callable

Java Multithreading-Sync block Java synchronization blocks (synchronized block) are used to mark methods or blocks of code are synchronized. Java synchronization blocks are used to avoid competition. This article describes the following:

Use jar Packs: Commons-dbcp-1.4.jar, Commons-pool-1.6.jar, Commons-logging-1.1.3.jar, plus JDBC driver for the database, for JAVA6 and above platforms Connection Pooling Management class Copy Code code as follows: Package cn.songxinqiang.

To implement the "sort alphabetically" operation, you can use the sort () function of the arrays class under the Java.util package. The arrays class contains various methods for manipulating arrays, such as sorting and searching. For example, the

In the transmission of files, in order to make large files more convenient and rapid transmission, the general use of compression to file compression and then transmission, The Deflater and Inflater classes in the Java.util.zip package in Java

In fact, the people who write Java seems to have nothing to do with the CPU, at most and we mentioned in the previous how to run the CPU full, how to set the number of threads is a bit of a relationship, but the algorithm is only a reference, many

This example for you to share the Java based on the socket production of the download process, and related code for your reference, the specific content as follows 1. First set up a server to process information and transfer files to the client