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Java static classes

 
Greenhorn
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Hello
I wanted to understand in what circumstances I would use static classes.
I understand that only inner classes can be marked static, but I dont know when and where and how to use them.

Thanks
Nikhil
 
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Static class , methods and data members needs to be loaded in JVM before an instance  of the class is created
 
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Only use nested classes when the nested class has some intimate relationship with its surrounding type. If you can say, “A Foo is part of a Bar,” then it might be a good idea to have Foo as a nested class in Bar. If you think there is a need to access Foo outside any Bar objects, then consider making it public static.
 
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I am not clear , whether your question about when should we use static inner class over non-static inner class.

If so, for static inner class, object can be created directly using outer class name (ie without instantiating outerclass object).
 
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Java has "static nested classes", but they're not at all the same as C#'s static classes, if that's where you were coming from. A static nested class is just one which doesn't implicitly have a reference to an instance of the outer class. Static nested classes can have instance methods and static methods.
 
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