Java

First, prefaceAnnotations (Annotation) as the carrier of the metadata, for the program code itself to provide additional information, the use of MyBatis and other ORM framework Friends of the @Insert should be familiar with the annotations, this is

Generics are security mechanisms that emerge after JDK1.5, simplifying mechanisms and improving securityBenefits of Generics1. Transfer problem classcastexception at runtime to compile time2. Avoid the hassle of forced conversions<> is used when the

After writing debugging for a long time, the border is not good processing, detailed see JDK class library, the following is only the basic implementation:Import java.util.iterator;/** * Class Name: Mylinkedlist Description: LinkedList Basic

Ext.: http://www.cnblogs.com/bluestorm/archive/2012/05/10/2493592.htmlGo first.Oracle DownloadsLinux under the JDK compression package, I downloaded the jdk-7u4-linux-i586.tar.gz file, the next good after the direct decompressionSTEP1:# Copy the

A lot of JSON constructs and parsing tools are published on www.json.org, in which Org.json and json-lib are relatively simple, but there are some differences in the use of the two. The following first describes an example of how to construct and

Original: Java Permutation algorithm code implementationSource code: Http://www.zuidaima.com/share/1550463479024640.htmJava permutation combination algorithm, the need to study children's shoes can be downloaded, the results of the operation are as

The Java class library contains a number of useful "base module" classes. In general, we should prefer to reuse these existing classes instead of creating new ones. : Reuse can reduce development effort, develop risk (because existing classes are

See the company's written test questions to write the Fibonacci sequence, I wrote a bit of a sneakWhat is a Fibonacci sequence: The Fibonacci sequence refers to a sequence of 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233,377,610,987,1597,2584,418

In recent days carefully learned Java IO stream, originally intended to watch video through the video to learn, but later found that the video does not understand and feel not very easy to use, so through the Baidu and API documents to learn Java IO

We know that in multithreaded programming, a large part of our content is to solve the problem of resource synchronization between threads and collaboration between threads. Synchronization between threads, popular we understand as go round, in the

Override hashcode member variable changed, object in set cannot find1. Use the Hashcode function of the object to determine the memory location initially, and if there is no storage object at that location, store the object in this2, if the hash

Java Picture Verification code includes the rotation of the text picture:This example shows a two-digit plus and minus operation, which requires more ways to get it through its own modifications:Or there are two other ways to choose from the

Usually when we click on a button, the operation of an object, we need to login to do, this time we need an interceptor to intercept a method,For example, you are in a library management center you want to borrow books, this time you will be asked

Source: http://blog.csdn.net/shootyou/article/details/3945221Java also has such a concept, it can make it easy to "make" a copy of the object, below to see how the clone mechanism in Java works?1. Clone©Suppose there is now an employee object,

A: PrefaceI saw a veiled remark on the internet when I secured some of the features of spring. "With interfaces, Spring AOP will default through the dynamic proxy of the JDK to implement proxy classes, and spring AOP will use Cglib to implement

Java design mode: Singleton mode; java Design Mode In the 23 GoF design modes, the singleton mode is relatively simple. However, sometimes the simpler the things, the more likely the problems will occur. The following is a detailed discussion of the

Java uses poi to export data to excelBackground: In the previous article, we used jtds to connect to the database to obtain the corresponding data. This article describes how to use poi to store data everywhere in excel. This program is an

Java -- determine whether the date is before today The date mentioned here refers to the date format of the string, for example, 2014-10-15. We need to determine whether the date is before today. There are many judgment methods on the Internet,

How to deploy the j2ee Project Server ?, J2ee project deployment 1. Right-click the Project and choose "1"> "Project"> "Add 1:   Figure 1 2. Click Add> Server (Tomcat 7.x)> Finish 2: Figure 2 3. OK! The J2EE project needs to run through

JAVA advanced-Network Programming> Connect to the server through a socketSocket refers to Socket> Read the homepage of any website--------- /** * @author Lean @date:2014-10-9 */public class SocketSample {public static void main(String[] args)