Java

1.List conversion into an array. (The list here is the entity is ArrayList) Invokes the ArrayList ToArray method. ToArray Public t[] ToArray (t[] a) returns an array that contains all of the elements in the list in the correct order; The

The operation principle and life cycle of Java applet The 1.Applet is embedded in the HTML page and executed by the applet's container (appletviewer or Web browser). The 2.Applet operation is controlled by the browser and is not controlled by the

When do I need time-out control? Timeout control typically uses a longer blocking operation, possibly a connection to a remote database or a network download, and after the program times out, it often takes some action, such as quitting the thread,

This article comes from the straight_talking_java@yahoogroups.com discussion group, which is already more than a year ago. Alan Williamson is an editor of the Java Developers Journal, which comes from one of his sources at IBM. I've seen a lot of

Concurrenthashmap is part of Doug Lea's Util.concurrent package, which offers a higher degree of concurrency than Hashtable or synchronizedmap. Also, for most successful get () operations, it tries to avoid a complete lock, and the result is a very

Introduction With the gradual maturation and perfection of Java technology, as a standard platform for enterprise-level application, the EE platform has made great progress. With the help of the many techniques included in the Java EE specification:

Summary Java EE programming is becoming more and more complex. Java EE has developed into a complex network of APIs, complicated programming and configuration. In response to this complexity, new frameworks and methodologies are emerging. These

Introduction to threading Optimization in-java 6 Sun, IBM, Bea, and others have spent a great deal of effort on the implementation of their Java 6 virtual machines to optimize lock management and synchronization. Such features as biased locks

In many Java applications, you need to invoke the Java compiler in your program to compile and run. However, in earlier versions (Java SE5 and previous versions) only the Java compiler could be invoked through the Com.sun.tools.javac package in

/** * 3 Ways to implement Java object sorting * @author Zhangwenzhang * */ public class Testobjectsort { /** * @param args */ public static void Main (string[] args) {//TODO auto-generated method stub /** Method 1 * Using

The Apache CXF Web Services Stack is another alternative from the Apache Software Foundation, and the Axis2 stack is also from the same organization. Although they come from the same organization, Axis 2 and CXF take a completely different approach

The operations of both programs are simple. These two programs are called VIRPRO01A and virpro01b, respectively, and correspond to program A and program B in the hypothetical scenario discussed above. Program VIRPRO01A The VIRPRO01A program is

Shopping cart is an indispensable part of E-commerce site, but at present, most shopping carts can only be displayed as a customer selected goods, the client can not extract the contents of the cart to meet the needs of their own transaction

The split () function splits a string string, returns an array of string (string[]) based on parameters such as ",", "-", "", and so on, and can specify elements by index. If not found, the entire string string is returned as the No. 0 element of

First, the introduction Many people may be thinking of the problem: Java has garbage collection mechanism, then there are memory leaks? The answer is yes, the so-called garbage collection GC automatically manages memory recycling without requiring

Look at how the Web service stack ws-secureconversation performance compared to the other Introduction: Ws-secureconversation enables you to guarantee the security of ongoing WEB service message exchanges while spending less processing overhead

The life cycle of an object is not as complex as everyone thinks. In fact, it answers two simple questions. When do I need to create an object? When did the object die out? These two problems are solved, so the life cycle problem of the object is

Now to discuss the server application (program) problem, I call it Namecollecor (name collector). What happens if multiple users try to submit their e-mail address at the same time? If Namecollector uses TCP/IP sockets, you must use the

The mention of Java internal class (Inner Class) may be unfamiliar to many people, in fact, similar concepts in C + +, that is, nested class (Nested Class), about the difference between the two and the connection, in the following will be compared.

On the server side, if implemented in the Java language, it is JavaServer Pages (JSPs) and servlets that deal directly with browsers. Behind them are the data Beans, DB Beans, and commands that are implemented through Java. 1. Java Server Pages