Java

1.Java built-in support for strings;The so-called built-in support, that is, do not have to implement string types like C through a char pointer, and Java string encoding conforms to the Unicode encoding standard, which means that the C-language

Today, I learned a little bit about javamail,javamail sending mail is really a troublesome problem. In order to later use, I wrote a piece of code, to play a jar package to facilitate later use. Oh The following three pieces of code are all my code,

Bubble Sort Bubble sort (Bubble sort), see this algorithm, I think of a word "decimal floating, large number of sinks," through the comparison of layers to make the decimal surface, and the large number of "stone sink bottom." So as to achieve the

Simple Observer Pattern implementation Copy Code code as follows: Import java.util.ArrayList; Import java.util.Collections; Import Java.util.Iterator; Import java.util.List; /*** The callback is used in the Observer mode:* A. The

1, Agent Mode An agent is a person or an agency acting on behalf of another person or another institution. In some cases, a customer does not want to or cannot directly refer to an object, and the proxy object can act as a mediator before the

Copy Code code as follows: /** * Get the parameter type of the reflection method based on the method name (note When using the overloaded method with the same name) * @param obj class instance * @param methodname Method name * @return *

First, the preface Java is an object-oriented high-level programming language that spans the hardware platform, Java programs run on a Java Virtual machine (JVM), which manages memory by the JVM, which is the biggest difference from C + +; Although

Today I would like to tidy up some of the problems I encountered in the previous period of export. Because of the requirements of the project, to do a part of the export function. At the beginning of the company's export, but it is very strange

This article describes the AES encryption algorithm implemented by Java. Share to everyone for your reference, specific as follows: Import Javax.crypto.Cipher; Import Javax.crypto.spec.IvParameterSpec; Import

Jcaptcha is very powerful, not only can generate a picture-type verification code, but also can generate sound (Sina uses a dual-authentication code). This article briefly introduces the Jcaptcha library and the use of examples, the following to see.

Package DAO; Import java.sql.*; public class Basedao {Oracleprivate static final String dirver= "Oracle.jdbc.driver.OracleDriver";private static final String url= "Jdbc:oracle:thin: @localhost: 1521:xe";private static final String name=

Thinking Analysis: Since it is a generic implementation of the stack structure, then you can not use the JDK with the stack package, you need to define a stack structure, such as LinkedList. The code is as follows: Stack.java: Copy Code

One, set mapping 1. Collection of small mediaset mapping is also a basic mapping, but not often used in the development process, so do not need a deep understanding, only need to understand the basic methods of use, etc. in the development process

The Java 2D API provides a two-dimensional image, text, and graphics functionality for Java programs by extending the Abstract window Toolbox (AWT). This complex rendering package supports linear images, text and graphics, providing a flexible,

This example for you to share the Java micro-letter app payment code for your reference, the specific contents are as follows Import java.io.IOException; Import java.io.UnsupportedEncodingException; Import Java.util.Random; Import

We know that (1) if the whole hundred years, can be divisible by 400, is a leap year, (2) if not the whole hundred years, can be divisible by 4, is also a leap. Every 400 years, there are 97 leap year. In view of this, the procedure can be designed

Copy Code code as follows: #macro (Pager $url $pager) #set ($FRONT _len = 4) #set ($BEHIND _len = 5) #set ($PAGER _len = 10) #set ($PAGER _center = $!{ Pager.pagenum}-$! {Behind_len}) « #if ($!{ Pager.pagenum} #foreach ($p in [1..$!{

The first type: For loop The format of the loop structure for statement: for (initialization expression; conditional expression; loop action expression) {Circulation body;} eg Class dome_for2{public static void Main (string[] args) {

Parsing HTTP user-agent information, using Uasparser-0.6.1.jar and Jregex-1.2_01.jar two packages Import Cz.mallat.uasparser.OnlineUpdater; Import Cz.mallat.uasparser.UASparser; Import Cz.mallat.uasparser.UserAgentInfo; Import

The previous article wrote a simple Java Web server implementation, can only handle some static resource requests, this article implementation of the Servlet container based on the previous server made a small transformation, increased the