java learning path

C:when c:otherwise Implement IF--else if--else effect---implement switch effect7, C:foreach implementation of the ForEach loop effect-----Traversal array, List, MAP, control the specified number of loops sum, in a special number of operations8, C:fortokens complete string cutting9, C:param can not be used alone, usually with the URL-related tags used in conjunction with the C:url to complete the Chinese code10, C:import Import the target page, save the content of the target page, and then use i

operations are synchronous blocking calls, and asynchronous file read and write operations are not supported. 　　JDK1.7 launches NIO 2.0. The following three improvements are mainly provided. Provides APIs that can obtain file attributes in bulk, which are platform agnostic and not coupled to the file system of the feature, and also provide the SPI for the standard file system for each service provider to extend the implementation; Provides AIO functionality to support file-bas

the authentication mechanism, so that the API should be usedYou do not need to specify a specific SASL mechanism. This API facilitates client and server applications so that applications can be based on the required security featuresSelect the mechanism you want to use, such as whether you are susceptible to passive dictionary attacks and whether you accept anonymous authentication. The Java SASL API also allows developers to create custom SASL mecha

Java learning notes (entry) _ basic java syntax, learning notes _ javaPreface After learning the first java program, you will come to the system to learn java. Starting with the basic s

similar to the ORM concept in the Java World, where ORM transforms structured data into Java objects, and retrofit transforms the data returned by the rest API into Java objects for ease of operation. It also encapsulates the invocation of network code. Retrofit–java (Android) Rest Interface Encapsulation Cla

java.lang.UnsatisfiedLinkError: no jacob in java.library.pathat java.lang.ClassLoader.loadLibrary(Unknown Source)at java.lang.Runtime.loadLibrary0(Unknown Source)at java.lang.System.loadLibrary(Unknown Source)at com.jacob.com.ComThread. Download jacob.rar and decompress Jacob. dll and Jacob. jar.Then: 1) Put Jacob. DLL files in c: \ Program Files \ Java \ jdk1.5.0 _ 08 \ bin, c: \ Program Files \ Java \ jdk

output to be processed, such as appending to a particular log file. 3 when the crontab suddenly fails, you can try/etc/init.d/crond restart solve the problem. Or check the log to see if a job has execution/error tail-f/var/log/cron. 4 Don't run crontab-r. It removes the user's crontab file from the crontab directory (/var/spool/cron). All crontab of the user have been deleted. 5 in Crontab, the% has a special meaning, indicating the meaning of the line break. If you want to use the words must b

Reprinted: Iii. Path to Java architect Wow ~ You have learnedJava architectNow you should be very skillful at using Java programming, and have a good programming idea and habit, however, you may still lack the ability to grasp the overall architecture of the application software. Now you are the first step towards the architect. Are you ready? OK. Let's go! P

Android development and learning path-Annotation simplifies the experience of the view control at the beginning Generally, when writing an android Activity, we always add the setContentView method to the onCreate method to load layout, and use findViewById to bind the control. Every time we write so many code, we always feel annoyed. Recently, I have read Annotation in android to simplify this process. If I

Osgi practical learning path: 7. ServiceListener of Service-2, osgiservice-2Three statuses of ServiceListener: ServiceEvent.REGISTEREDServiceEvent.MODIFIEDServiceEvent.UNREGISTERING Service search demo Based on ServiceListener Provider Student-manage/Activator. java Package com. demo. service; import

Now more and more Java developers are talking about OSGi in a way that makes sense. When I went to school a few years ago, I did a lot of Eclipse plug-in development, and then I personally felt that the Eclipse plug-in system is flexible and powerful, and the system and OSGi are also feather. Recently intend to re-examine the system of OSGi, while learning to write an OSGi exploration series as a summary, a

Detailed description of path compression code for java programming implementation and query sets, and detailed description of java First, let's take a look at the two path-compressed images: Union-find Sets is a very delicate and practical data structure, which is mainly used to deal with the merging of non-intersect

Wrote a Web project that was properly tested locally, but there was an error deploying to the server. The reason is that the configuration file is not read.Later from the printed file path is found in the Java Class.getResource ("/"). GetPath () When you get the path, the spaces in the path are converted to%20.On the I