chat application in java

are essentially hashmap objects that exist in the application code. Whenever you add a new object to the cache, it is saved in your app's memory. This strategy is not a problem when saving a small amount of data, but it is problematic to cache more than GB of data. memcached server designers use a distributed architecture that is easy to scale, so you can use memcached to do massive data caching.The memcached schema consists of two parts. The first i

unwilling to serialize some sensitive attributes and information, you can also call objectoutputstream. the writeobject () method explicitly specifies the attributes to be serialized. We will refer to custom serialization Methods later. ★BeanThe above serialization is only a basic application. After you serialize an object to an external file, use NotePad to open the file, you can only guess from a few readable characters that this is an information

Java EE, as the development of mission-critical enterprise-class application of a set of standardized integration platform, more specifications, a wide range of content, so as to develop Java application has brought a lot of "trouble." For example, in order to implement RDBMS storage for content, we might have JDBC, En

Turn from: http://www.cnblogs.com/sam8881-Blogs/p/5630976.html Learning (Java Web) programming technology key points and direction to complete the project Jhipster (J-Chao) its highlights: Super strength, sweeping Europe and the United States, the latest Universal Java Web Development Program generator (Java Web Generator). The development experience accumulated

application container, but does not containEJBContainer.The Tomcat server is a free open source Web application Server. Tomcat isAPache Software Foundation (Apachesoftware Foundation), a core project in the Jakarta Project,APache, Sun, and other companies and individuals developed together. With Sun's involvement and support, the latest servlet and JSP specifications are always reflected in Tomcat, and Tom

Java EE, as the development of mission-critical enterprise-class application of a set of standardized integration platform, more specifications, a wide range of content, so as to develop Java application has brought a lot of "trouble." For example, to implement RDBMS storage for content, we might have JDBC, Entity Bean

Java is favored by many programmers because of its object-oriented, cross-platform, good portability, and high security. More and more people use Java as the preferred language for application software development. When running Java applications, especially in a cross-platform working environment, you must determine th

2.1 Creating a Java source fileA Java application consists of one or more files with the extension ". Java", which are referred to as Java source files, which are referred to as compilation units from the point of compilation.This chapter contains two

First, create a Java source fileA Java application consists of one or more files with the extension ". Java", which are referred to as Java source files, which are referred to as compilation units from the point of compilation.This chapter contains two

essentially a HashMap object that exists in the application code. Whenever a new object is added to the cache, it is saved in your app's memory. When you save a small amount of data. There is no problem with this strategy, but it is problematic to cache more than GB of data. Memcachedserver's designers use a distributed architecture that is easy to extend, so. can use memcached to do massive data cache.The memcached architecture consists of two parts

　　 SummaryThe Java Rule engine is a component embedded in a Java program that tests and matches the Java data Objects currently submitted to the engine and the business rules that are loaded into the engine, activates the business rules that conform to the current data state, and, depending on the execution logic declared in the business rules, Triggers the corr

The system runs a high CPU alarm, generally can be found through the top or task manager which processes are using the CPU, but this granularity does not let us know more, we need to find out which part of the program is CPU-intensive and what is occupied by the CPU, so as to facilitate our future tuning, Here is a practical idea: Find the process that consumes high CPU p Find the thread that consumes high CPU in process P t Find out what the thread T is doing This article

multi-language support of the application system).SpringSpring is a lightweight Java EE application framework.The core of spring is a lightweight container (container) that implements the IOC (inversion of Control) mode container, and the goal of spring is to implement a full-fledged integration framework that implements a combination of multiple sub-frameworks

The current popular Java Enterprise Application System framework is diverse, in order to enable developers to choose the system architecture to improve the development efficiency of Java Enterprise Application, first of all, based on EJB and the more popular framework based on POJOs, respectively, and then to these fra

j2ee| Skills | speed | project In the Java EE Technology system, it is often instilled in the concept of too many containers, what EJB containers, servlet containers, and so on, and the development process in the development, configuration, deployment between iterations and repeated; so often embarrassing situations occur: It takes a few minutes to change a bug, It takes two or more hours to deploy and test, and development engineers have to interrupt

JMX Automatic Monitoring Java application solution well-known file is not secure Preface Recently in doing a monitoring agent component development work, the main is to collect a variety of system metrics information, and then reported to the monitoring system, in order to monitor and alarm. The goal is to achieve automation: Automatic discovery Services, dynamic detection services, monitoring automatic o

In the design of today's multi-tier Web applications, we can use both Java applets and servlet. Applets provide a convenient mechanism for creating powerful dynamic interfaces that provide an efficient means of processing requests from Web servers or other application servers. The Sun's application model describes the best specification for developing enterprise

As we all know, Java Web Start (JWS) supports distributing applications in a web-based manner. So why do you want to distribute the Java Web Start (JWS) application over the CD-ROM? There are many reasons for this. For larger applications, a full installation can be a pet-heavy download task, even with high-speed bandwidth. Second, not all desktop systems are onl

tasks can be clearly identified in the architectural blueprint, enabling project team members to position their tasks well. A good architectural blueprint can also standardize tasks, which can be well divided into categories, with the same or similar workload and nature of tasks in the same class. This is a very good basis for estimating the workload.Operation and MaintenancePreviously said that each task in the frame composition has a better positioning. Anyone can use it to quickly familiariz

tasks can be clearly identified in the architectural blueprint, enabling project team members to position their tasks well. A good architectural blueprint can also standardize tasks, which can be well divided into categories, with the same or similar workload and nature of tasks in the same class. This is a very good basis for estimating the workload.Operation and MaintenancePreviously said that each task in the frame composition has a better positioning. Anyone can use it to quickly familiariz