The folks at Packt asked me to review one of their book on EXTJS 4 If you are interested in buying it (a judgment you may reserve until after you have read the review) “http://www.packtpub.com/ext-js-4-first-look/book” this is link you can go Loiane Groner iS a EXT-JS consultant, she is expert in EXT JS. As far [...]

Exceptions   Oracle includes about 20 predefined exceptions (errors) – we can allow Oracle to raise these implicitly. For errors that don’t fall into the predefined categories – declare in advance and allow oracle to raise an exception. For problems that are not recognised as an error by Oracle – but still cause some difficulty [...]

Passing Data within a Task Flow – It is a common use case to pass parameters from ADF Task Flow with fragments into another ADF Task Flow without fragments.f the bounded task flows referenced by ADF regions share the data control scope and the transaction – we can access parameter directly through Expression Language. If [...]

Spring MVC is part of Springframework. It allow us to create application based on MVC design pattern in way that, we can leverage other features of Spring like authentication, ORM, AOP and others. In Spring MVC core component is the DispatcherServlet{link}, It works as front-controller. All request are processed by DispatcherServlet. It is also responbile [...]

Life cycle of a JSP page consists of two phases, translation phase and execution phase. Every JSP is a Servlet, a JSP page is translated and compiled into servlet and the resulting servlet handles the request, So life cycle of a JSP page largely depends on the Servlet API. JSP engine does the following 7 [...]

“Hash Map is a Hash table based implementation of the Map interface. This implementation provides all of the optional map operations, and permits null values and the null key. (The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls.) This class makes no guarantees as to the order of [...]

Servlets are managed by web container.Life cycle defines how servlet is loaded, instantiated and initialized, handles requests from clients and how it is taken out of service.The servlet life cycle methods are defined in the javax.servlet.Servlet interface of the Servlet API that all Servlets must implement directly or indirectly by extending GenericServlet or HttpServlet abstract [...]

There are two types of cloning for prototype patterns. One is the shallow cloning which you have just read in the first question. In shallow copy only that object is cloned, any objects containing in that object is not cloned. For instance consider the figure ‘Deep cloning in action’ we have a customer class and [...]

There are three basic classifications of patterns Creational, Structural, and Behavioral patterns. Creational Patterns • Abstract Factory:- Creates an instance of several families of classes • Builder: – Separates object construction from its representation • Factory Method:- Creates an instance of several derived classes • Prototype:- A fully initialized instance to be copied or cloned • Singleton:- A class in [...]

Normally we want to fetch this information that which row have duplicate value.So here i am sharing very easy solution for this.by using this query you can get which row have multiple entries. SELECT surname, COUNT(surname) AS numOftimes FROM employee GROUP BY surname HAVING ( COUNT(surname) > 1 ) You could also use this technique [...]