Java

The recent project needs to operate MySQL, the knowledge of the database as early as the undergraduate graduation that will be forgotten, the development of the past few years have not touched the operation of the database.Take this opportunity to

1.http Tool ClassPackage com.funshion.common.utils;Import Java.net.URI;Import Java.net.URL;Import Org.apache.http.HttpResponse;Import org.apache.http.client.HttpClient;Import Org.apache.http.client.methods.HttpGet;Import

Java data types are divided into primitive data types and reference data types.The primitive data types in Java are divided into four classes and eight kinds. Primitive also do not know how to translate more appropriate, call him the basic data type

There are 2 ways to implement multithreading in Java:1. Inherit thread Public classThreaddemoextendsThread {String name; Private intCount = 100; //using the parameter constructor of the thread classThreaddemo (String name) { This. Name =name; }

Preface Adapter mode is the adaptation between the required functionality and the functionality to be provided, so that the two can be seamlessly interfaced. For example, real-life computer charging situation, if a friend abroad to travel,

Implemented using Oracle's official JavaMail, Javamail:https://java.net/projects/javamail/pages/homeAdding the downloaded jar package to the project path is OK, I'm using the latest version of 1.5.2 Javax.mail.jar.Reference to the Mail protocol:

1 Java's two major features are cross-platform and garbage collection mechanisms2 Path:windows The path to search when the system executes a command3 classpath: When you write down Improt java.util.*, when the compiler faces the import keyword, you

Generic typeI. Common data structures: stacks, queues, lists, arrays, trees, graphs, heaps ...Stack: Advanced Back--press stack, stackQueue: FIFOArray: Stores multiple elements of the same element with the number "array insert/delete data"Query fast,

Type 1. Various types of string2.string turn Bytes3. Array to List4. Conversion 5.Import Java.lang.reflect.constructor;import Java.lang.reflect.invocationtargetexception;import java.util.Arrays; Import Java.util.hashmap;import java.util.list;import

FlowLayout Streaming layout Manager/ * * FlowLayout streaming layout manager */ Public classTest03 { Public Static void Main(string[] args) {Frame frame=NewFrame ("My Frame"); Button btn1=NewButton ("Button 1"); Button btn2=NewButton ("Button 2");

The topics are as follows:Processing of stringsIn the actual development work, the processing of strings is the most common programming task.This topic is required to process the user input string. The specific rules are as follows:1. Capitalize the

Application of Java.util.regex pattern1 Public Static voidMain (string[] args) {2 //simple regular match. Matches a regular expression from a given string3 //match to return true matches not to return false4String regex_0 = "(\\;|\\?

In the process of testing synchronization, see the following code:public class Mslunch { private long c1 = 0; Private long C2 = 0; Private Object lock1 = new Object (); Private Object Lock2 = new Object (); public void Inc1 () {

Content navigation:L Java memory modelL Hardware Storage Architecture• Bridge between Java memory model and hardware storage System:U the visibility of shared objectsU Competitive ConditionsThe Java memory model specifies how the JVM works in

During the company internship, slowly realized as a developer, the company's code convention is how important.The following article is listed by the company.1. Rather than "String", "StringBuffer" is recommended to being used to concatenate

Differences between JDK 1.5 1.6 override and jdkoverride An error is reported for some projects during the update today. After searching online, according to the online description, a batch of configuration changes will not work:

Design Mode-singleton ModeWhat is Design pattern? It is a set of summaries that are repeatedly used, known by most people, classified and catalogued, and experience in code Design. The design pattern is used to make code reusable, make it easier for

Implement Multiple spring data sources in saas ModeWhen we develop saas or mobile applications involving multiple companies, each company is required to use a database. How can we configure the spring data source so that each company can use

Custom string type Custom String object, inherited from the dynamic array template class (dynamic array template class implements memory management, can reduce memory allocation and memory copy, optimize the append array, etc., refer to the

Hibernate space error!There are already two records in the database for testing data. The following is my test on the hibernate query ....   package cn.lwk.dao;import java.util.List;import org.hibernate.classic.Session;import