Spring Example , Spring benefits , Overheads of not using Spring

Hi All,
I am newbie to spring , could anyone give me example with spring & example without spring , so that i can get clear idea
about spring , spring benefits as well as getting the overheads of not using spring , I have read some docs but still am not able to understand spring well.

Try this website. Easy to understand

http://www.vaannila.com/index.html

Thanks david007 for reply,

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http://www.vaannila.com/index.html

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very nice examples ,

but what is the benefit of using spring , what are the overheads if we are not using spring (illustrate with examples if possible) ?

Hi All ,
Any reply