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Java: Static Class?
Can a class be instantiated as static in java?
static class c1(){
}
Can this be done? I'm confused with this and memory mapping with non static stuff's. Please help
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A static inner class can be instantiated without the need for an instance of the outer class. In general, an Inner class is a part of nested class, called Non-static nested classes in Java. The types of inner classes are member inner class, anonymous inner class, and local inner class.
A static class cannot be instantiated. All members of a static class are static and are accessed via the class name directly, without creating an instance of the class. The following code is an example of a static class, CSharpCorner.
Static variables in a class: As the variables declared as static are initialized only once as they are allocated space in separate static storage so, the static variables in a class are shared by the objects. There can not be multiple copies of same static variables for different objects.
It is not possible to create instances of a static class. Static classes and class members are used to create data and functions that can be accessed without creating an instance of the class.
The significance of static with a class definition is not whether the class can be instantiated or not, but rather whether the class must be instantiated from within a non-static method of the outer class or not.
Non-static inner class instances are tied to the instance that created them -- there's a pointer in the inner class instance back to the creating instance (which is useful in a number of ways). Static inner class instances are not tied to the creating instance.
(I worked in the innards of the JVM for about 10 years and I still find this confusing.)
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Can the class be instantiated with the static keyword in java ? eg : static class c1(){ }
Your terminology is incorrect. "Instantiating a class" means creating an instance of the class; i.e. creating an object. This is done using the new operation. Your example is really about declaring a class.
Having said that, yes you can declare a class as static, but this can only done for a nested class; i.e. a class declared inside another class.
am confused with this and the memory mapping with non static stuff's please help
I haven't a clue what you are talking about here. If you need more help on this point, you will need to explain yourself more clearly.
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static doesn't have anything to do with memory mapping. It means there is no instance it is associated with.
For a static class it means instances of the class are not associated with an outer class instance.
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