It’s far better for performance to have a ready-to-use instance of the object that we can share across the system. In this case, the lazy instantiation strategy works very well.

Ok, so I do a lot of Java application development, but want to get into java web programming as well( for my new personal website I'm working on ).What I am confused about is what Java technology ...

That means that Java will generally be better at preparing developers to work with other languages, such as the very-similar C#. Also read: An introduction to C# for Android for beginners.