core java source code

SelectableChannel. All socket channels are selectable, including channels obtained from pipeline (Pipe) objects. Only SelectableChannel can be registered on the Selector object. A channel can be registered on multiple selectors, but each selector can only be registered once. SelectionKey ):The selection key encapsulates the registration relationship between a specific channel and a specific selector. The selection key object is returned by SelectableChannel. register () and a mark indicating t

Java concurrent packet source code learning-AQS framework (2) CLH lock queue and spin lock, aqsclh As mentioned in the previous article, AQS is based onCLH lock queueSo what is CLH lock queue? complexity is complicated, simple, and simple. The so-called greatest truths are simple: CLH lock queue is actually a FIFO queue, and each node (thread) in the queue only n

doclet droiddoc class, the method start has thrown an exception in Java. lang. reflect. invocationtargetexceptioncom. sun. tools. javac. code. symbol $ completionfailure: sun not found. util. resources. openlistresourcebundle class file 1 error make: * ** [out/target/common/docs/DX-timestamp] Error 45 does not need to compile the SDK documentation during compilation, this problem occurs because the

Java. util. concurrent package source code reading 11 ThreadPoolExecutor, threadpoolexecutor First, let's look at the execute method of ThreadPoolExecutor. This method can reflect what happened after a Task is added to the thread pool: Public void execute (Runnable command) {if (command = null) throw new NullPointerException ();/* if the number of running worker

Abstract: Abstract: Original creation Place: http://www.cnblogs.com/Alandre/sediment brick slurry Carpenter hope reprint, keep abstract, thank you! Wake up every day to tell yourself that your goal is "technology + English and life"! -Mud and brick pulp carpenter A. Char says string Two. The understanding of string and the source code analysis A. Char says stringThis is also the second time to chew back to

Download: Jar.zip2. Step Two: Create a connection through the method getconnection () in the DriverManager class, connect to the database using the six-factor wxb to catch the exception with Try...catch. The code is as follows:Package cn.nxl123.www;import Java.sql.DriverManager;import java.sql.SQLException;Public class Connect {Public static void Main (string[] args) {String classname= "Com.mysql.jdbc.Driver";try {Class.forName (className);//Load dri

ReentrantLock source code analysis for Java concurrent Series Before Java5.0, only synchronized and volatile can be used to coordinate access to shared objects. We know that the synchronized keyword implements the built-in lock, while the volatile keyword ensures the multi-thread memory visibility. In most cases, these mechanisms work well, but cannot implement s

-decimal conversion of the IP address of the computer network, it is often found255=2^7+2^7-1;2^7=2^6+2^5 ....... 2^1+2^0+12^k=2^ (k-1) +2^ (k-2) +............+2^1+2^0+1// This can be demonstrated by an iterative approach to 2^k= (*2^) k-1 (=2^) k-1 (+2^ )// with k-1 to replace K namely K=k-12^ (k-1) =2^ (k-2) +2^ (k-2) and so on there will be 2^k=2^ (k-1) +2^ (k-2) +............+2^1+2^1 that is, the original proof.What is the connection between this and the complement?If there is a positive a=f

Original: Java Struts+hibernate Enterprise Human Resources management system source code downloadSource code: Http://www.zuidaima.com/share/1778471692995584.htmA simple Talent management systemHuman resource management is a very important field in management, which can manage the employees effectively through human res

Java Program source code is very easy for others to peek, as long as there is an inverse compiler, anyone can analyze the code of others. This article discusses how to protect source code by encrypting technology without modifying

incorporates cumulative rules.It is known from the following code that the difference between Longaccumulator and Longadde is Casbase, the latter passing b+x, while the former is called R=function.applyaslong (b=base.x).The Longadder class add source code is as follows: Public voidAddLongx) {cell[] as;Longb, V;intm; Cell A; if(( as= cells)! =NULL|| !casba

Java. util. concurrent package source code reading 14 thread pool series ScheduledThreadPoolExecutor Part 1 threadpoolexecutor ScheduledThreadPoolExecutor is a subclass of ThreadPoolExecutor and implements the ScheduledExecutorService interface. public class ScheduledThreadPoolExecutor extends ThreadPoolExecutor implements ScheduledExecutorService

Problem: When debugging Java source code, you can only see the source code, but cannot see the immediate value of the variable in the source codeCause: In order to save space, the JRE removes debug information from the class file

Java Program source code is very easy for others to peek. As long as there is an inverse compiler, anyone can analyze other people's code. This article discusses how to protect source code by encrypting technology without modifyin

see a 11. * Consistent snapshot:if modcounts change during a traversal 12. * of segments computing size or checking containsvalue, then 13. * We might have a inconsistent view of state so (usually) 14. * Must retry. A.*/16.transient intModcount; 17. 18./*** The table is rehashed when its size exceeds this threshold. * (The value of this field was always */23.transient intthreshold; 24. 25./*** the Per-segment table. .*/28.transient volatileHashentry[] table;

Use encryption technology to protect Java source code JavaThe source code of the program is easily peeked at by others. Anyone can analyze others' code as long as there is an anti-compiler. This article discusses how to avoid modi

Learn Java concurrency programming have to understand java.util.concurrent this package, this package has many of the concurrency tools we often use, such as: Reentrantlock, Countdownlatch, Cyclicbarrier, Semaphore and so on. The underlying implementations of these classes depend on the Abstractqueuedsynchronizer class, which shows the importance of this class. So in the Java Concurrency Series I first abst

JDK source code reading-Java Memory Model0. Why the Java memory model is required?In order for programmers to ignore the memory access differences between various hardware and operating systems, there is no need to worry about the differences between memory models in different architectures,

Source code DownloadLog4j is the de facto Java standard logging tool. Whether to use log4j to a certain extent can be said to be a measure of a developer is a qualified Java programmer standards. If you are a Java programmer, if you are not using log4j, you really need to re

上周末搬家后，家里的宽带一直没弄好，跟电信客服反映了N遍了终于约了个师傅明天早上来迁移宽带，可以结束一个多星期没网的痛苦日子了。这段时间也是各种忙，都一个星期没更新博客了，再不写之前那种状态和激情都要慢慢褪去了，总觉得心里慌的一逼，这怎么行呢？！趁明天周末，在公司电脑上记录下这周的一些学习内容。近期在看一本很经典的java书籍：《深入理解java虚拟机 第二版》，几年前也翻过，但那时候功力不够，不太能看懂就没看了。现在回过头来看，发现确实写的很好，很多知识点都能理解了，而且讲的也很有深度，收获颇多。后期计划按照这本书的内容写出一系列博客，来深入学习和复习下java虚拟机相关的知识。Fu Yun Source