what is soa architecture in java

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

type modifier (typespecifier). It is designed to modify variables that are visited and changed by different threads. Variables defined by the volatile type are extracted directly from the corresponding memory each time the system uses it, rather than using the cache. After using the volatile modifier member variable, the values of the variables that all threads see at any time are the same. A demo sample using volatile

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

synchronization method than a mutex The acquisition of the lock in the critical section is called entering the critical zone; And the release of the lock is called leaving the critical section. Differences (with semaphores and mutexes) Mutexes and semaphores are visible in any process of the system; In other words, a process creates a mutex or semaphore, and another process attempts to acquire the lock

be type-detected, or the array itself is holding the object, and the generic container is only in the compiler to check type safety, and in the run time is all object, only half-definition, or the generic container does not hold objects, it will lead to the above problems.Summary: In this chapter we mainly compare arrays with generic containers and observe

Click to enter _ more _java FAQ-base Class Library1, Java.math package has what functionThe Java.math package provides a mathematical class in Java. Includes basic floating-point libraries, complex operations, and arbitrary-precision data operations. Main classes such as:?The classes in math are described below: arbitrary length shapingBigInteger, the arbitrary length of the non-variable shaping. Beca

Click to enter _ more _java thousand ask1, meta-annotation is whatSee the comments here: what is the commentUnderstanding custom Annotations See here: How to customize annotationsMeta annotations are responsible for annotating other annotations. Java 5 defines 4 standard meta-annotations (meta-annotation): @Target, @Re

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 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

parent class, when the methods are invoked, they must be using the methods defined in the subclass (dynamic connection, dynamic invocation). Polymorphism is divided into compile-time polymorphism and Run-time polymorphism. In which the polymorphic is static, mainly refers to the method of overloading, it is based on the different parameters of the list of differ

Click to enter _ more _java thousand ask1. What is ATTACHAPI?The Attach API is a set of extension APIs provided by Sun, which is not a standard Java API. As the name implies, Attach, some programs are attached to the JVM. Simply put, a program

Nested class does not depend on an instance object of an external class,static Nested class can access the non- static The member variable . 5. When you access staticnestedclass, You can direct use static Nestedclass , without the need to add the name of the outer class, in staticnestedclass static member variable , you do not need to add the name of the external class. The inner class defined in the static method is also static Nestedclass

Heroes, the Java Thread.CurrentThread () what role ah. 397458726 | Browse 10,631 times 2009-09-16 13:39 2009-09-16 13:52 Best Answer Thread.CurrentThread () can get a reference to the current thread, typically by Thread.CurrentThread () when there is no thread object and need to obtain thread information.This answer is