Java

1. Multiple threads Repeat a result as follows: It's sold out and the warehouse is full.public class Productandconsumer {public static void main (string[] args) {Clerk Clerk = new Clerk (); Product Product = new product (clerk); Consumer Consumer =

Original link: http://www.cnblogs.com/ityouknow/p/5614961.htmlOverviewGarbage collection Garbage Collection is often referred to as the "GC", which was born in the 1960 MIT Lisp language, and has matured for more than half a century.In the JVM, the

Serialization is a mechanism for dealing with the flow of objects, so-called object flow is the flow of the object's contents. CanRead-write operations are performed on the convective objects, and the streamed objects can be transferred between the

58th: Use the exception for recoverable cases, use run-time exceptions for programming errorsThe Java programming language provides three types of throwable (checked exception) runtime exceptions (Run-time exception) and errors (error).the exception

  JOptionPaneHelps to easily pop up a standard dialog box that asks the user for a value or notifies themAlthough many of the methodsJOptionPaneThe class may appear complex, but almost all of the use of this class is for the following static 

First, the GUI1, the concept of the GUIThe GUI (graphical user Interface) is a graphical UI that makes the application look more friendly.2. AWT, swing, and SWTAWT (Abstract Windows Toolkit) is the most primitive GUI toolkit in the Java language,

DAY04----access Modifiers in the Java languageFirst, access modifiers overview:An access modifier is a modification to a variable or a method or a class that implements some of the necessary permissions after the modification, mainly to explain how

1.XP installation JMeter After the start, the following error, found a lot of ways to try, no use;2. Finally found a way to solve the [thanks to the nameless God], added in the environment variable path:%systemroot%/system32;%systemroot%;3. It can

This article describes the callable and the future, they are very interesting, one produces results, one to get results.Callable interface is similar to runnable, can be seen from the name, but Runnable will not return results, and can not be thrown

Today, we want to play a big!!!We have revised the single dog system used in the previous array into a database version and used some simple ideas in object-oriented. If you do not know the crossing of this system, please jump to the directory page,

The two-tier semantics of the volatile keyword once a shared variable (a member variable of a class, a static member variable of a class) is modified by volatile, then there is a two-layer semantics: 1) The visibility of a variable is guaranteed by

Has 2.6.1 ever used Linux? What do you use it for?Linux is a relatively stable operating system for a long time, so we usually take him as a server (Web,db,app, etc.).Linux itself has a C compiler environment, some of our software is not package

The String.Split () method in Java is quite powerful, but the split () method uses regular expressions, which are relatively slow,In fact, most scenarios do not need to use regular expressions, and below share a method that does not use regular

How to learn Java, this is a lot of newbies often ask me the question, now I briefly describe the next Java beginner to the job to learn some things:The first thing to understand is that the Java system is designed in three ways: J2se,j2ee,j2me

Question one: What is RUP? (Reference location: Baidu Encyclopedia and the major web sites)A: The RUP full name is the rational Unified process, which is the unified software development processes, the unified software development process is an

Java Programmer face Test set (1-50)First, the Java Foundation part1. What are the aspects of object-oriented features?A: Object-oriented features are mainly in the following areas:1) Abstraction: Abstraction is the process of constructing classes

What about the problem that Swing forms sometimes need to zoom in or out the border to display ?, Swing zoom in and out Sometimes the components added after the swing form are compiled cannot be displayed after the run operation.     I

Servlet Filter (Filter) (8), servletfilter 1. servlet filter background In the project, we will encounter such a requirement to filter the ip addresses of users accessing the server. Only the ip addresses in the list can access the service. To meet

Maven environment configuration and maven Environment I have studied how to build a maven project. The following describes how to build a maven project. 1. Download maven Click to enter http://maven.apache.org/download.cgi? . 2. Deploy

Java object serialization and java serialization Java provides two methods for Object Persistence: serialization and external serialization. (1) Serialization Serialization is a process that describes an object in a string of bytes. It is used to