what is api in java

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

Yesterday and a former colleague chatting, all kinds of spit slot PHP, Spit Groove swoole, he thinks PHP everywhere is a hole, PHP is very limited. Php+swoole is not suitable for high concurrent servers, C+swoole is the best solution. C + + has a variety of data structures, C + + can be thread, C + + can share objects.

Click to enter _ more _java thousand ask1. What is socketThe socket is also called a socket. The two applications on the network realize the exchange of data through a two-way communication connection, one end of the bidirectional link is called a socket, so the socket is pa

/** 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

1. Using the class defined below, what is the output of the following code?Output Result:Please summarize the rules of Java field initialization according to the output of the code . There are two places in Java initialization: initialization blocks and constructors, where initialization

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

Difference between the two: Action class: ◆ Struts1 requires the Action class to inherit an abstract base class. A common problem with Struts1 is the use of abstract class programming rather than interfaces. ◆ Struts 2 Action class can implement an Action interface or other interfaces to make optional and customized services possible. Struts2 provides an ActionSupport base class to implement common interfaces. The Action interface

Click to enter _ more _java thousand ask1. What is a stringThe Java.lang.String class represents a string that is usually bright, so-called string, which is a set of characters composed of character sets. It has the following characteristics:String is an immutable objectEach

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

The following error is reported when starting:Workaround:Go to the following directory: wlntio.dll and paste it into the C:\Java\bin directory (assuming the JDK was previously installed to C:\Java); However, in fact, my directory is only the folder 32, there is no x64, t

JQuery Easyui is still more used in Java background development. Of course, objectively speaking, although the development of front-end technology, many background interface design is embedded in the front-end technology framework. But I personally feel that this article will not hinder our study of jquery Easyui.1. What