Liu Wuhua's Technology and Learning Notes

Worked in a project to gathering/analysis core banking requirements for the China market. Had been working for banking technology for like ...

Recently worked for 2 banks for integrating the front office(the corporate channel) with their back office system(core banking systems T24)...

  When access a https service in the web browser, the service provider should provide some certificate on its site which proves it’s the au...

  logger.debug() method in Log4j already checks isDebutEnabled, maybe it’s not necessary to check isDebugEnabled() before every debug() met...

SWIFT provides a network to allow financial and non-financial institution(e.g. corporates) to transfer financial transactions through a ‘fin...

Technorati 标签: banking ISO 9362, also known as SWIFT-BIC, BIC code, SWIFT ID or SWIFT code, is a standard format of Business Identifier Cod...

I have a Java projects workspace, with several pure Java projects and several Web J2EE projects. When import the existing projects into the ...

 In order to learn more about concurrent programming language, I decide to learn erlang programming in the Linux platform. Here are the inst...

In case the customer pays a single or multiple installment amounts before it is due, then the system applies the amount as per the appropria...

This post explains how to use the Explain plan for Oracle's SQL execution to debug sqls. First create two tables: create table char_tabl...

  The sequence which determines the order in which arrears are to be paid in a loan account. At the product level, the bank can set the ru...

  long fibonacci(int n){   assert(n>=0);   if(n == 0) return 1;   if(n == 1) return 1;   return fibonacci(n-1) + fibonacci(n-2); } long ...

RD in FCR is implemented as a variant of CASA. For CASA. there are four things to do when configure a CASA account and make a transaction. ...

  Technorati Tags: data structure Data structure actually contains two words. The first one is data, which is the abstract representation ...

Technorati Tags: Algorithm , Equibilbrium array , data structure Equilibrium index of a sequence is an index such that the sum of elements ...

Technorati Tags: Algorithm , Anagram of integer public class Symmetric {     // Solution A     int[] digits = new int[] {};     boolean ...

 It's a traditional question in Oracle:   How to select the 11th record to the 20 th record in a database table. A. The simplest form:  ...

  Steps to configure the automatically startup and shutdown on Linux    Once the instance is created, edit the "/etc/oratab" file ...

Tablespace---The primary logical database structures of any oracle database. datafiles correspond to each tablespace. Oracle stores data lo...

Oracle allocates logical database space for all data in a database. The units of database space allocation are data blocks, extents, and seg...

An integrity constraint is a declarative way to define a business rule for a column of a table.  If an integrity constraint is created for a...

Oracle uses several structures to provide complete recovery from an instance or disk failure: the redo log, undo records, a control file, a...

Concurrency is the simultaneous access of the same data by many users. Without adequate concurrency controls, data could be updated or chang...

Most basic level of operations that Oracle performs. User and associated server process are on separate computers.     1. An instance has s...

Network connections Oracle Net Services is Oracle’s mechanism for interfacing with the communication protocols used by the networks that fa...

Technorati Tags: Oracle instance An oracle database server consists of an Oracle database and an Oracle instance. Every time a database is ...

Technorati Tags: Oracle schema A schema is a collection of database objects. A schema is owned by a database user and has the same name as ...

The database has logical structure and physical structures. Physical and logical structures are separate, the physical storage of data can b...

I Technorati Tags: Linux , Single user mode t’s common to boot a Unix/Linux system into single user mode to debug boot problems. 1.  Sele...

locate and which:   using locate to find files in the file system. using which to locate command/shells under the $PATH. dmesg   print the b...