Recently was on the ground successively asked several times HashMap realization, the answer is not good, intends to review the JDK in the collection framework, and try to analyze its source code, so on the one hand, these classes are very practical, master its implementation can better optimize our program On the other hand, learning from the JDK is how to achieve such a set of elegant and efficient class library, improve the programming ability.Befor
/projects/javaguard/Proguard is a free Java class File compression, optimization, and mixed handler. It deletes useless classes, fields, methods, and attributes. Optimize bytecode to the maximum extent, and rename classes, fields, and methods with short and meaningless names. Eclipse has integrated proguard.... Official Website: http://proguard.sourceforge.net/Oiosaml. Java oiosaml.
The purpose of the frame framework is to define a skeleton scheme that deals with the same underlying details, and when developers use the framework, they can implement their own functions according to their own needs--just fill in their own things/flesh.The simplest frame, similar to JUnit, has a main (string[] args) that launches the framework. If it is an appl
Click to enter _ more _java thousand ask1. What is the JDK base extension class library?See the Java core Framework here: What is the Java core framework?The JDK base Class library is divided into two parts, the base library, the extended base library, and provides a considerable amount of functionality, as follows:
text format, can be sent to any mailbox (to achieve the bulk delivery of advertising mail)5. Mass or send SMS separately, support two kinds of third-party SMS quotient Interface6. Spring AOP Things processing7. Code generator (freemarker), Code zip compression packaging8. MD5 Encryption SHA encryption (login password with this encryption)9. Database connection Chi Ali Druid. Druid has significant advantages in monitoring, scalability, stability, and performance to support concurrent10. Join the
() method, and if the non-blocking thread simply changes the interrupt state, the thread will continue to run down, but if it is in a unblocking thread, such as the execution of sleep (), wait (), join () The thread that waits for the method throws the interruptedexception exception because the interrupt state is set, and the program handles this exception capture.The three main points mentioned above, the first is the implementation of polling at which level, there is no special requirement, i
Using Java's complete implementation of the jdbc framework class JdbcUtils for MySql (including addition, deletion, modification, query, and JavaBean reflection principles, with the source code), I recently watched Lao Luo's video, followed by a framework class JdbcUtils that uses Java to operate MySql databases. java
Struts, Hibernate, and spring are common keys in our Java development, and they provide the most appropriate solution for different scenarios. But do you know how these well-known frameworks were originally created?We know that traditional Java Web applications are implemented using Jsp+servlet+javabean, which implements the most basic MVC layering, which divides the program structure into several layers, t
The purpose of the frame framework is to define a skeleton scheme that deals with the same underlying details, and when developers use the framework, they can implement their own functions according to their own needs--just fill in their own things/flesh.The simplest frame, similar to JUnit, has a main (string[] args) that launches the framework. If it is an appl
interface, the specific implementation of the unknown, then you rely on other people jar package, the entire project will only use the LOG4J log framework, which is a typical façade pattern application, As with the JVM, we write the log code for SLF4J, SLF4J to handle the differences between the specific log implementation frameworks, as we write Java code for the JVM, and the JVM handles the differences b
"bridge"
As far as the Java language system is concerned, the gof design mode is an implicit "bridge" between Java basic knowledge and J2EE framework knowledge ".
There are more and more developers who are familiar with Java, but there are not a few programmers who have been wandering at the language level. There are
of control, reverse control) and AOP architecture multi-layer Java EE system, but it does not force you to have to use spring in every layer, because it is modular very well, Allows you to choose one of its modules according to your needs, it implements a very elegant MVC, provides a unified interface for different data access technologies, and the IOC makes it easy to implement bean assembly, provides concise AOP and implements Transcation managment
does not have a primary key, then MBG will not generate the update by primary key method).
The Java client class uses the above object appropriately, and optionally generates Java client classes. MBG will generate the following client classes for MyBatis 3.x:A mapper interface class that can be used with MyBatis 3.xMBG will generate the following client classes for Ibatis 2.x:A DAO class that conforms to
In the development of large Java software projects, many Java architects will encounter the database read and write bottlenecks, if you are in the system architecture and do not take into account the cache policy, or do not choose a better caching strategy, then it will be a nightmare to refactor. This article is mainly to share 5 common Java Distributed Cache
Java Collection FrameworkBefore Java 2, Java provided the ad hoc class. For example: Dictionary, Vector, Stack, and properties These classes are used to store and manipulate groups of objects.Although these classes are useful, they lack a central, unified theme. For this reason, the way you use the vector class differs greatly from the way you use the Properties
Overview
Jt is a design pattern framework for fast implementation of Java applications. Jt has applications in many large mission-critical systems. The framework achieves the following objectives:
The framework architecture is based on a messaging design pattern: A framework
In Java development, often used in the framework of SSH, and in this framework, we first touched by the magic of spring, although there are more than N, said Spring is a collection of n many common code, is to help us to achieve, we have long ago to achieve or have achieved a good idea of the collection , but as a qualified engineer, how can not understand the bo
mainstream protocols;
The ability of customization is strong, and the communication framework can be expanded flexibly through Channelhandler.
High performance, compared with other industry mainstream NIO framework, the Netty is optimal.
The community is active, the version iteration cycle is short, the bugs found can be repaired in time, and more new features will be added;
Experienced a l
module provides some service-oriented support. For example: Multipart request for file upload, which also provides the integration of spring and other web frameworks, such as struts, webwork.7) Spring MVCWeb MVCFrameworkJsp/velocityPdf/exportSpring provides a full-featured MVC framework for building Web applications. Although spring can be easily integrated with other MVC frameworks, such as struts, the Spring MVC
.
The metadata helps the CLR to locate and load classes, lay out instances into memory, resolve method invocations, generate Native code, enforce security, and set up the run time context boundaries.
The CLR, much like Java Virtual Machine (JVM) provides automatic garbage collection-Facilities code, this G Arbage Collection feature is called
managed Data. But Unlike Java VM, the CLR also has mechanism to sy
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