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Anonymous inner class--Bi Xiangdong Java Basic Tutorial Learning notes

1. The anonymous inner class is actually the shorthand form of the inner class.2. The premise of defining an anonymous inner class: The inner class must inherit a class, or implement an interface. 3. Anonymous inner class format: New parent class name or interface name () {defines subclass content;}4. In fact, the anonymous inner class is an anonymous subclass object, which synthesizes a step of defining the class and creating the object, and this object is a bit "fat" and can be understood as t

Exception handling--Bi Xiangdong Java Basic Tutorial Learning notes

parentheses and curly braces), and throw is used inside the method. Throws followed by the exception class name, you can follow a number, the middle separated by commas.The throw is followed by an exception object. There is a special subclass in the exceptionruntimeexception(runtime exception), if the class or its subclass exception is thrown inside the method, it can no longer be declared on the method, the compiler can pass, or if the class or its subclass exception is declared on a method, t

Bi Xiangdong _java Basic Video tutorial 20th day _io Stream (1~4)

Whether the corresponding pathname is an absolute path (regardless of whether the File/folder exists)*/ public classFileDemo2 { public Static voidMethod_1 ()throwsioexception {file File=NewFile ("file.txt"); SOP ("file.txt exists:" +file.exists ()); SOP ("file.txt canexcute:" +File.canexecute ()); } public Static voidmethod_2 () {file file=NewFile ("file.txt"); SOP ("file.txt isfile:" +File.isfile ()); SOP ("file.txt isdirectory:" +file.isdirectory ()); } public Static voidMain (string[

Java Basics _ Bi Xiangdong _java Basic Video Tutorial notes (5-10)

class of object, which object calls this function, this represents which objectfinal:1. Modifier classes, variables (member variables, static variables, local variables), functions2. The modified class can not be inherited; 3. Modified functions cannot be overwritten4. The modified variable is a constant and can only be assigned oncePolymorphic class Invocation: Member variable look to the left, function see which class is actually instantiated on the rightNote: When the throw is present alone,

"Bi thing" Microsoft Decision Tree algorithm

that are set to be predictable, the algorithm generates a separate decision tree for each predictable column.ExampleAdventure Works Cycles's marketing department wants to identify some of the characteristics of previous customers, which may indicate whether these customers will be able to purchase their products in the future. The ADVENTUREWORKS2008R2 database store describes demographic information about its previous customers. By using the Microsoft decision tree algorithm to analyze this inf

"Bi Thing" Microsoft cluster analysis algorithm--three-person identity division

associations, and further understanding of the distribution of data. and on each cluster node, right-click, and then select "Drill" on the menu that appears, you can browse the sample data attributes that belong to this class.The degree of correlation between the dependent variable and the independent variable is understood from the classification profile chart."Classification characteristics" is mainly to present the characteristics of each class, see figureIn the "classification comparison",

"Bi thing" data mining algorithms--verification of accuracy

predicted and the correct rate was 100%;The 380-up sample has 0 predictions correctly, 380 errors fall, and the forecast accuracy rate is 0%.Neural Network algorithm--Classification matrix:DescriptionThe flat 114 samples had 0 predictions correctly, 60 were divided into fall, 54 were divided into up, the prediction accuracy was 0%;The 443 samples of the fall have 277 predictions correctly, 166 errors are up, and the forecast accuracy rate is 62.53%;The 380-up sample has 188 predictions correctl

"Bi thing" Microsoft neural network algorithm

based on the model name to ensure that the test group remains the same when the model is re-processed.Maximum_input_attributes: Specifies the maximum number of input variables that the algorithm can handle. Setting this value to 0 disables the input variable.Maximum_output_attributes: Specifies the maximum number of output variables that the algorithm can handle. Setting this value to 0 disables the output variable.Maximum_states: Specifies the maximum number of variable value states supported

Learn SQL Server Bi--etl design step by step

In this section, we mainly talk about my game transaction Data Analysis Project ETL (data extraction, loading, conversion) exactly how to do. First of all, the next source system, because our main trading station server is not in the company, so can not directly from the source system directly extracted data. In fact, we already have a simple data analysis system, but this is the previous people do, not using sqlserver2005 bi platform to do, but dire

Implementing bi-Directional SSL authentication reprint (http://www.cnblogs.com/bjrmt/archive/2006/08/01/464634.html) for Tomcat under Linux

First, the foreword:The article on how to implement bi-directional SSL authentication with Tomcat server is very early, and a more practical article can look at IBM developerWorks China website May 2002 configuration Tomcat 4 uses bidirectional SSL (http:// www-900.ibm.com/developerworks/cn/security/se-tcssl/index.shtml) and configure Tomcat 5 to use bidirectional SSL (Http://thinkbase.net/w/main /wiki? tomcat5ssl_serverandclient).On the principle sid

Improve the performance of DB2 queries in a business intelligence environment-a query tuning method specifically for data warehousing and BI (1)

running on the Windows platform. However, the concepts and information are useful for any platform. Since most business intelligence (BI) environments use the DB2 database partitioning Feature (DPF,DB2 partitioning feature), our example uses DPF to divide data into multiple physical and logical partitions. Database layout and Settings This section describes the physical and logical layout of the databases that are used to perform tests on our syste

BI test Tool cross-database data comparison, support Oracle,sqlserver

the function provided by Oracle.Similar to the function checksum, but the computation speed is much slower than this, especially when the table data volume is large.The Hashbyte function is similar in SQL Server. Note If you do not use the To_char function, the calculated value will overflow, and if placed in. NET to undertake, will report the OCI data overflow error, so To_char is also necessary.you are welcome to share some experience in BI testing

Austrian Power-bi v11--Phoenix Nirvana, heavy hit

After a year, the Austrian Wei Power-bi heavy re-push the new version, in the previous V10 Web visualization front-end analysis tools, based on a more user experience this piece. V11 stands at the user's point of view to design and develop a new version of the user's vision, and is optimized for the optimization of the front-end framework, the experience of the mobile device, and the dynamic View and free version optimization four. Let's take a brief

Introduction to the existing Java open-source Bi front-end framework

Existing Java open-source Bi front-end framework I recently demonstrated the open-source Bi front-end framework in the Java field and shared some things I remember.Because I only watched it for a few days and didn't have time to sort it out, it looks messy and not very thorough. Currently, common bi front-end frameworks (Business Intelligence projects) in the

Let bi tell you: Where's Santa Claus?

Just saw an article about Christmas bi analysis, think very interesting, special to translate the next and everyone to share (unfortunately, the article published a little time).With the coming days of Christmas, the POWER BI team answers one of the most important questions: where is Santa Claus?Social network data is the most appropriate answer to this question, and we searched Twitter for the following ke

Bi-open the door to Business Intelligence

Bi-open the door to Business IntelligenceTo meet the requirements of enterprise managers, a Bi system must take the following steps:1) to integrate data in various formats, clear the error records in the original data-data preprocessing requirements.2) data pre-processing should be centralized in a unified manner-metadata (metaDaTa, data warehouse (DA)TaWarehouse) requirements;3) Finally, professional stati

Automated monitoring of Bi system storage space

一个完备的BI系统有多种Log及监控机制,其中一种监控是监控BI系统存储的增长趋势,BI中所谓的存储可以分为数据仓库的存储跟OLAP数据库的存储。 数据仓库 至少到目前为止,所有的数据仓库还是基于关系型数据库所构建的,只不过数据库的设计遵循了维度数据模型而已。所以我们可以使用SQLServer提供的一系列功能来收集数据仓库中表粒度的存储大小信息,要做到这一点我相信有很多方式,其中一种是使用系统视图: sys.tables返回当前数据库所有的表 sys.partitions返回当前数据库中所有的分区,该视图具有rows属性标明该分区中有多少行数据。我们知道一个表至少含有一个分区,所以我们可以通过前两个视图找到表及其分区,因而也就知道一个表有多少行(当然如果只是为了找到表的行数完全没必要这么麻烦)。 sys.allo

Bi 7.0 common transaction code

Here is a handy list of transaction codes (t-codes) that can be used as a cheat sheet in SAP Bi/BW development. Very frequently used t-codes are inBoldLetters. Al11Db20IDOCListcubeOra_lockRmps_rectypecRole_cmpRrc1Rrc2Rrc3RrmxRs12Rsa1Rsa10Rsa11Rsa12Rsa13Rsa14Rsa15Rsa16Rsa17Rsa18Rsa1oldRsa2Rsa2oldRsa3Rsa5Rsa6Rsa7Rsa8Rsa9RsadminRsattrRsboRsboh1Rsboh2Rsboh3Rsd1Rsd2Rsd3Rsd4RsdcubeRsisetRskcRslgmpRsmoRSPCRspc1RspcmRspcpRsplanRsq02RsrtRsrtraceRsrvSe

Bi notes-suggestions on how to properly process the SSAS Database

Today, another friend has encountered slow processing speed of the SSAS database, mainly because the data aggregation volume is indeed large and it takes more than thirty minutes to process each time, is there any way to reduce the processing time? I have been engaged in Bi for seven years, so similar questions can definitely be listed in the top 10 FAQ in the career circle. These problems are often a little complicated. Here we will list some of our

Microsoft bi's SSIS series-a bug in scrip task scripts that MVPs cannot understand

only say it is a suspected bug. But from this perspective, it may also be by design. Here is my personal opinion: on this question, I also mentioned it to Microsoft. I can visit SSIS 2012 readonlyvariables in script task doesn' t work to follow the final confirmation from Microsoft's technical team. For this problem, including the above two very Nb MVPAnd the other two cool people in the post SSIS script task 'readonlyvariables 'I have dug up. MVPArthur urz and Reza Raad share the same view of

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