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Proxy pattern is one of the common design patterns in Java. The so-called proxy mode means that the client does not directly call the actual object, but indirectly calls the actual object by calling the proxy. Why call objects in this indirect form? Generally, because the client does not want to access the actual object directly, or because it ...

Computing-intensive and IO-intensive are two typical examples of Java concurrent programming. This elephant is going to talk about its own content in this regard. This article is relatively basic and only suitable for children's shoes that are just beginning. Please don't spray them. Computing intensive Computing-intensive, as the name implies, ...

I. Static Agent The proxy object implements the same interface as the target object. eg: //Save user UserDao(save)Direct preservation UserDaoProxy Add transaction processing to the save method IUserDao.java Target Object Implementation Interface public interface IUserDao{ void save(); } UserDao.java Target object public cl ...

Lecture 1: GUI (User Graphic Interface) I. overview 1. GUI: Graphical User Interface (GUI), a graphical user interface, is a way for computers to interact with users. 2. Two ways of computer-user interaction: GUI and CLI GUI: Graphical User Interface, Graphical User Interface, graphical user interface, to display the computer oper ...

Lecture 1 Enumeration I. overview Enumeration here is not a unique enumeration iterator for collection vector s, but a new feature of JDK 1.5. The reason for using it alone is that this knowledge point is more important and relatively difficult to understand. Why do we have enumerations? Question: What is the definition of a week ...

statement This article was founded on March 10, 2017. Successful installation is also the day.The links given in this paper may fail in the future.About Tomcat self-startup, Tomcat official website prompts one mode. But this article uses other ways. Environmental Science System: Ubuntu-16.10-server-amd64 User:root Get ready File: JDK( jdk-8u121 ...

sorry, first buy a pass, haha. Everyone is working hard to upgrade, enjoying all kinds of conveniences brought by JDK8, but sometimes the upgrade is not so smooth? For example, today's question. We all know that the biggest change in JDK8's memory model is to abandon Perm and usher in the era of Metaspace. If you are not familiar with Meta ...

Understanding Java object serialization Links to the original text: http://www.blogjava.net/jiangshachina/archive/2012/02/13/369898.html   There are many articles about Java serialization. This article is a summary of my personal past study, understanding and application of Java serialization. This article covers the basic principles of Java se ...

AbstractQueued Synchronizer has one synchronization queue and several waiting queues. The types of nodes in the synchronization queue and waiting queue are both static internal class AbstractQueued Synchronizer. Node. The source code analyzed here is based on JDK 8. ConditionObject includes the following fields // Head node of waiting queue pr ...

1. Why need Handler mechanism In my < How Threads and Processes Work in Android > In this article, it is clearly stated that when the application is started, the system will create an execution thread named "main thread" for the application. This thread is important because it is responsible for dispatching events to correspon ...