What exactly makes Singleton Evil?

I read through many discussions related to Singleton Patterns, and different developers dislike it for different reasons. Not all the reasons make a pattern evil, because many of those reasons doesn’t really make your software really bad. I will be writing here each of the reason, and try to explain whether the reason is justified to call Singleton Evil:

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Why DI? A list of important design pattern articles

I would enlist here the list of articles which explains why DI is important in designing software today satisfying a few goals like

  • Code management
  • System learning curve / Ambiguity Management
  • API Dependency management
  • Testability
  • Monitoring
  • Application Life Cycle

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Spring Collection Injection: How does it actually work

I am learning Java Spring Framework out of personal interest. I am trying to understand how it works. Today I was learning dependency injection in Spring. I started with injecting java collections through xml beans. As you already know, if you want to set a property of primitive type, you need to put exactly the same property name in bean xml definition. I started with that for injecting a List collection named addressList.

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