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Java EE CDI Producer methods tutorial

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This is a tutorial of CDI Producer methods. In CDI, a Producer method generates an object that can then be injected. Producer methods can be used when we want to inject an object that is not itself a bean, when the concrete type of the object to be injected may vary at runtime, or when the object requires some custom ...

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Even in the jdk there is bad code

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Java 7, TreeSet and NullPointerException. Recently I tried to compile with java 7 a project developed with java 6. Lot of fun happened during tests execution, tests that in java 6 were  running smoothly, with java 7, they were strangely failing! So, I had to understand why and this is what I discovered… The context first: In that project I have a ...

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Android Child Group Activity

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Hello Friends, Today I am going to share very Important post for Child Group Activity, means activity open inside Tab Group. For this I use Animated Activity. This logic I picked from stackoverflow.com. Hope it will help some one. Print Screen: Create a new project, name TabGroupChildDemo. Create an TabHostActivity and extend it to TabActivity. Create 3 other activity name-HomeActivity, ...

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Using JacpFX clients with JSR 356 WebSockets

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JSR 356 WebSockets are one of the new and exciting features in the upcoming JEE 7 release and includes Server- as well as Client API’s in its reference implementation. This makes it well suited to integrate it with JavaFX on client side. JacpFX is a RCP framework on top of JavaFX which uses a message based approach to interact with ...

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Spring MVC: form handling vol. 1

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Spring MVC is a part of Spring Framework and its main purpose is to make web-development more simple, convenient and easy. interaction with forms is a part of every more or less modern web application. Spring MVC allows you to perform all kinds of activity with forms in a very strict and simple way. In the article you will read ...

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Polymorphism and Inheritance are Independent of Each Other

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Flexible programs focus on polymorphism and not inheritance.  Some languages focus on static type checking (C++, Java, C#) which links the concepts and reduces polymorphic opportunities. Languages that separate the concepts can allow you to focus on polymorphism and create more robust code. JavaScript, Python, Ruby, and VB.NET do not have typed variables and defer type checking to runtime. Is ...

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Simple Spring MVC Web Application using Gradle

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This post will be similar to our previous post, Simple Gradle Web Application, except we will now use Spring MVC, rather than raw servlets. It is really easy to get a basic Spring MVC application running with Gradle. You can download the source code for this tutorial on Github. Prerequisites Install Gradle Our basic project structure will be:   spring-mvc ...

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To estimate or not to estimate, that is the question

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Disparaging those who provide software estimates seems to be a growing sport. At conferences, in blogs and the twitter-verse it seems open season for anyone who dares to suggest a software team should estimate. And heaven help anyone who says that an estimate might be accurate! Denigrating estimation seems to be the new testosterone charged must-have badge for any Agile ...

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How to create a memory leak

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This is going to be a rather evil post – something you will be googling when you really wish to make someone’s life a misery. In the world of Java development memory leaks are just the type of bugs you would introduce in this case. Days or even weeks of sleepless nights in the office are guaranteed for your victim. ...

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