Java

Many scenarios: Ali middleware Cobar, AOP annotations, Com.mysql.jdbc.ReplicationDriver read-Write separation driveSynchronization of MySQL databases.MySQL is an open-source relational database system. Master-Slave synchronous Replication

JDK ResearchWhat does volatile mean?How to look at the JDK source code? How to debug the source code! ---------carefully interpret key classes, key codes, common API explanations! I don't know where I'm in doubt.--------don't know too much how to do

Test code:System.out.println (0L = = 0);//trueSystem.out.println (((Long) 0L). Equals (0));//falseInteger i1 = 100;Integer i2 = 100;Integer i3 = 1000;//if the int values between-128 and 127,VM use the same object, the new object is created.Integer i4

Recently interesting, read some Java source code, found that the source of some of the clever implementation of the code is implemented through bit operations, such as decimal integers into 16 binary form of string output:1 Public StaticString

A little summary of recent projects related to CAD data1. About list usage in Java.It can save a number of different elements, but how do you determine what kind of element it is when you take an element? When you take an element, you can determine

In headfirst Java, example: attacking web games The code provided in the book to check if the target was hit: for (DotCom dotcomtotest:dotcomslist) {result = Dotcomtotest.checkyourself (userguess), if (Result.equals ("hit")) { break;} else if

This article is a summary of the study of the article on the network, thank you for your selfless sharing.When you use the Synchronized keyword to protect a block of code, you must pass a reference to an object as a parameter. Typically, you will

1 Installing the Java environment:Http://www.oracle.com/technetwork/java/javase/downloads/index.htmlDownload the latest version of the JDK and install it, Cloudsim needs to run in jdk1.6 or later.Take jdk1.6.0_24 as an example, the default

The JDK version I used was the 1.6.0_37 version, the operating system is Windows XP, and today I want to use some management tools under the%java_home%/bin/directory, and the results are in trouble. You cannot list a Java virtual machine running

Java NiO non-clogging applications are commonly used in I/O reading and writing, we know that the performance bottleneck of the system operation is usually in I/O read and write, including Port and file operation, in the past, after opening an I/O

String d = "Sweat D";String e = "shout";String f = "D";System.out.println ("String length is" + d.length () + "." + d.getbytes ("GBK"). length+ "bytes in GBK or" + d.getbytes ("UTF-8"). length+ "bytes in UTF-8");System.out.println ("Char array

/** * Shanghai Automotive Group Finance Co., Ltd. * Copyright (c) 1994-2014 all rightsreserved. */package Com.saicfc.pmpf.internal.manage.utils;import Java.io.file;import Java.io.ioexception;import Java.util.iterator;import

Recent projects have a problem, is to get the last page connection address, I use the Internet Explorer, in the use of LOCATION.HREF connection to the new address, in the new address page with Document.referrer method to obtain the original address,

The exception (Exception) mechanism in Java is very important, the program will inevitably error, the anomaly mechanism can catch errors in the program, to improve the stability and robustness of the program.Exceptions in Java are divided into

Start from difficulty 1:1, Remove specified Elem from unsorted array:2 pointers, one was to iterate all the elements in the array, the. Increase if current value was not equal to specified element.2, Remove duplicates from sorted Array:still 2

Then on a continuation of the contract and the study, this article describes the callable and 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

Today, when writing socket data to communicate with each other, encountered a bug and its egg pain. There is no problem with the server and client when transferring data in one direction, but the problem arises when all two have input and output

Android Accounts Api User Guide, androidaccounts This article is translated from the Udinic Article Write your own Android Authenticator. You may need to flip the wall to read it. This is the best article that the translator can find to introduce

Reverse merge of linked list related Interview Questions The linked list is the most basic data structure. Interviewers often use the linked list to evaluate the basic abilities of the interviewee. In addition, the linked list-related operations are

What exactly happened behind gcc-static hello. c? You may often use gcc-static ***. c. What commands and libraries are used for this static link? First, let's analyze what libc. a is. We already know that xxx. so is a dynamic link library, xxx. o is