chat messenger in java source code

[Java source code learning-multithreading] LockSupport (1), javalocksupport Today, I started to learn the Java multi-threaded source code and recorded what I learned. Due to my limited personal ability, there are inevitable errors

In Java programming or interview often encounter = =, equals () comparison. I looked at the source code, the actual programming summary.1. = == = In Java is the address that compares two objects in the JVM. Better understand. Look at the following code:1 public class Comaddr

The java. util package contains a series of important collection classes. This article will start with analyzing the source code, thoroughly studying the internal structure of a collection class, and traversing the source code implementation of the iteration mode of the set.

Recently, the time to take the Java Arrays Tool class Aslist method to do the source code analysis, the online collation of relevant information, recorded down, hope can also help readers! The Arrays tool class provides a method Aslist, using this method You can convert a variable-length parameter or array into a list. The

The first job in Java programming: source code calculator,Objective: (1) to get started with a language, you need to write at least 20 thousand lines of code. Then, we compile a program for calculating the number of lines of code to motivate ourselves to move forward. (2) un

Illustration of Java IO: 1. File source code, iofile Writer: BYSocket) Weibo: BYSocket Bean flap: BYSocket FaceBook: BYSocket Twitter: BYSocket I remember that the Java source code was first read by the set. I wrote a series of ar

The previous properties article has described the basic usage of the Java configuration file class properties, and when viewing the Help documentation for the JDK, there are also two methods in the Properties class LoadFromXML (InputStream) and S Toretoxml (OutputStream, String, String), the XML in the method name is not difficult to determine that the two methods are read/write data to an XML file, respectively. The JDK documentation section looks li

method), in addition to the multiply with congruential (multiplicative congruential method) and mixed with congruential (Mixed congruential method). OK, now let's open the source code of Java and look at the true colors of linear and congruential!Enter Java.util.Random in Eclipse and press F3 to go to the source

Java Source Code Analysis: VectorAlthough, vector collection in our programming, use less, at least I use less, in general, I tend to use the list to store some of the same type of elements.In fact, the internal implementation of the vector and the internal implementation of the ArrayList are basically consistent, the internal is through the use of arrays to achi

Note: The development background: Import into the MyEclipse source code is GBK encoding, the project is UTF-8 encoding, resulting in viewing the source code garbled problem.Package com.test;Import Java.io.File;Import java.io.IOException;Import java.util.Collection;Import Org.apache.commons.io.FileUtils;Import Org.junit

writer:bysocket (mud and brick pulp carpenter) Micro-Blog: Bysocket Watercress: Bysocket FaceBook: Bysocket Twitter: Bysocket Remember Java source code is set to start looking, wrote a series of related articles, received a good evaluation. Thank you, readers. I will still read the old writing to the old , and vivid image of the writing to experience. This is st

the index by words. Because we usually want to store the location of the file, but rarely use the file name as the keyword to search, so we use this field to index the Java file name. The unstored field is opposite to the unindexed field. This type of field will be analyzed and indexed, but its value will not be saved to the index. Because the entire source code

. Repeat this process until a valid node is deleted. Returns null if the queue has not been deleted successfully after traversing. The following figure is a successful deletion of the structure diagram: from the above figure, we can see that, during the delete operation, the head over the number of nodes reached the threshold, triggering the executive head of the update, so that it points to the C node. After removing the header node from above, the two schematic diagram shows that the queue

Recently the company to engage in shopping malls, let me consult, finally read a lot, or code, table field comments are not complete, or is a bug, or the document is missing, finally decided to develop a set of Mall.The following is the development of some experience, right vote record down, to make a record of their own.I qq:4407509, have a problem can contact mehas been engaged in e-commerce-related and Internet financial development, the processing

Source code analysis of the collections list of Java Collection SeriesI. Introduction to tranquility list A sort list is an ordered sequence that allows efficient insert and remove operations at any location. It is implemented based on a two-way linked list. Ps: Here is a question about whether or not the data structure of the sorted list is a circular two-way li

reach more than 60,000 times, that is, the entire list will be scanned, the blame will be so slow.The original list is then replaced with the set:setSpeed on the go up, in the weight of this piece up to spend a second, why HashSet speed went up, that is because its internal use is Hashtable, this is HashSet contains source:Public Boolean contains (Object o) { return Map.containskey (o); About Unsupportedoperationexception ExceptionsA java.lang.UnsupportedOperationException exception occurr

($ proxy0 extends proxy implements manager.Manager managerproxy = (manager) proxy. newproxyinstance (managerimpl. Getclass (). getclassloader (), managerimpl. getclass (). Getinterfaces (), securityhandler );Managerproxy. Modify ();}}Iii. Execution result:Do something before Method* ****** The modify () method is called.Do something after MethodIv. Mechanism Analysis:Proxy. (classloader loader, class (1) create a proxy class $ proxy Based on the getproxyclass (loader, interfaces) Call methods o

Http://www.cocoachina.com/ios/20141106/10153.htmlIPHONE6/6 plus Screen fit demo (Code bottom processing) (Forum member Satian) httThe project is a IPHONE6/6 plus screen adaptation demo, using a code-writing interface adaptation method to IPhone5 screen resolution as the basis for design.Test environment: Xcode 6.0,ios 6.0 or moreGoogle:java Code Turn objective-c

The Java Server supports source code for resumable upload (express and Thunder are supported) (only HTTP protocol is supported) There are many articles on the Internet about Java's support for HTTP resumable upload, but there are few articles about the support for HTTP resumable upload on the Java Server.This article

Maybe we often pay attention to the characteristics of each Set in practical applications or interviews. For example, the Set cannot store duplicate elements, and cannot maintain the insertion and size order, map sets store key-value pairs and so on. However, if you want to learn Java well or have a higher goal and be proficient in Java, it is far from enough. In fact, we still need to know more about the c