what is rule engine in java

I often hear about IOC and spring. What is IOC? IOC can be understood as an implementation method of 'interface-Oriented Programming ide'. IOC implements mandatory 'interface-Oriented Programming '. Spring forcesProgramImplement the class according to the architect's idea. For example, the architect designs three business objects: users, data pools, and data elements. Architects want these three

Click to enter _ more _java thousand ask1. What are the annotations?Annotations in Java (Annotation), also called metadata. is a feature introduced in later versions of Java 5.Annotations and classes, interfaces, enumerations are at the same level, can be used to label packages, classes, fields, methods, local variable

Click to enter _ more _java thousand ask1. What is the difference between FULLGC, MINORGC and MAGORGC?FULLGC, MINORGC, MAGORGC, and YOUNGGC are the Java garbage Processing mechanism (GC) nouns, which are very simple to differentiate: Laosheng is a garbage cleanup, known as FULLGC or MAGORGC. A new generation o

Click to enter _ more _java thousand ask 1, what is the new generation of replication algorithm Understanding heap Memory Look here: What is the Java heap memoryLearn about Java garbage collection look here:

there are deficiencies please understand: Write down your valuable message, I will promptly correct--------------------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------------------- ----------------Great man Nicee-mail: [Email protected]qq:602091999Cell-phone number:15800666248http://www.cnblogs.com/lsw9/Welcome harassmentIf there are deficiencies please u

The JavaScript programming language is developed by Netscape,inc., which is not part of the Java platform. JavaScript does not create small applications or standalone applications. In the most common form, JavaScript resides in HTML documents, providing a variety of web page interactions that are not possible with simple HTML. 　　The main difference between

getmessages () {return messages;}} This design is good? Suppose we repeat the same message to the record () method (the message comes from a different user, so you can treat each message as a new String ("...")), and the message content is large, then this design will greatly waste memory space, because the message list is recorded in the newly created, Sepa

What's the difference between PHP and Java as a Web site? Share to: ------Solution-------------------- Copy and paste it right now. This is seen in several ways: First, the operating mechanism: Java code is compiled into bytecode, will be in the virtual machine by JIT two compile into the local code, it

/** 2, please explain the meaning of the characters ' \ ' in Java, what is the role?*Answer* In Java the backslash ' \ ' represents the meaning of the escape character, which is a marker** When the compiler reads this tag, it knows that the next character

As a Java engineering lion, you've certainly experienced a lot of interviews, but every time you're almost always asked what is the MVC design pattern, how do you understand MVC's similar series of questions about MVC?"Frequency of occurrence""Key Test Centers" The meaning of MVC The structure of MVC "Exam Analysis"In

　As a Java engineering lion, you've certainly experienced a lot of interviews, but every time you're almost always asked what is the MVC design pattern, how do you understand MVC's similar series of questions about MVC?"Frequency of occurrence""Key Test Centers" The meaning of MVC The structure of MVC "Exam Analysis"In

has finished running. Another thread has the ability to get an object lock to run.Assuming that it is not the same object, it does not produce mutually exclusiveWhen synchronized is acting on a class, it is mutually exclusive to call the same synchronized-modified method for multiple threads of different objects in the same JVM. Because a JVM only produces a cla

Java programming 2-What is program design? Author: Chen yuefeng from: http://blog.csdn.net/mailbomb programming, commonly known as programming, is a professional concept. Beginners and even some developers cannot simply explain this concept. Therefore, it makes beginners feel that programming

, Java allows the object address to be written back before initialization, this is the so-called out-of-order. So what about C ++? The typical C ++ double-checked locking may be like this. Static Singleton * getInstDC (){If (inst _ = 0){Boost: mutex: scoped_lock l (guard _);If (inst _ = 0)Inst _ = new Singleton ();}Return inst _;} Just as the

Yes. PHP has less multithreading than CC ++ and Java. PHP only has a multi-process solution. Therefore, the global variables and objects in PHP are not shared, and the data structure cannot be used to perform cross-process operations. yesterday, I chatted with a former colleague and spoke with various PHP programs, swoole thinks PHP is everywhere, and PHP is very

Brief The previous chapter briefly describes what a collection is and what kinds of collections there are.In this chapter we mainly introduce one of the implementation of collection, List.What is List In the previous chapter, we have learned that list is divided into 3 cate

, the ticket will appear negativeThere is also a synchronization methodThe format is as follows:Synchronized method return type method name (parameter list) {}5, the life cycle of the thread/1) Create status2) Ready state3) Operating Status4) Blocking status5) Termination Status6, Add JS UnderstandingLook at a piece of code firstvar x = Document.getelementsbyname (data); var i; for (i = 0; i var value=x[i]

Java is first compiled into bytecode, and then the bytecode is finally generated by jvm for execution. Php is first compiled into an intermediate code and then handed to the zend virtual machine for execution. So what are the differences between the two in terms of compilati

First, let's Look at Java features? Simple----Java designers have removed many of the complex features in C + +, such as pointer manipulation and operator overloading? Object-oriented----Everything in Java is an object. Therefore, focus on the data, the methods of manipulating objects in the application, and the proces

the class of Activiti query history information. After a process has been executed, this object provides us with query history information. 7.7 Basic OperationsDesign Flowchart (various components, such as wiring, user tasks, gateways)Process definition and additions and deletions changeProcess variables and additions and changesStart process DefinitionTask additions and deletions changeComplete the taskHistorical information QueryLearning 7 Basic operations