static final object

Hi !!!

I am little bit confused with static final object....i have done a sample pgm,i jst intialized
one final static obj,

after that i called ths static obj,i added two elements.and in my main method(),again i called up
same static object and again i added one element and then i printed its jst printing .

final keyword should not allow to override add elements correct?.can u explain me properly?..

ths is sample code what i created........

Code :

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import java.util.*;
class sortedSet 
{
	static final List list = new ArrayList();
	void finalMethod(){
		list.add("Test");
		list.add("Test");
	}
	public static void main(String[] args) 
	{
		sortedSet set = new sortedSet();
		set.finalMethod();
		sortedSet.list.add("Sample");
		System.out.println("sortedSet.list value !"+sortedSet.list);
	}
}

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Final will prevent you from creating a new instance.

For example, this isn't possible because of final.

Code :

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final List a = new ArrayList<Integer>();
			a = new ArrayList<String>();

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Chris

Exactly! The final keyword will still let you change the properties or attributes of the mutable object so you can still call .add on a static list. You cannot however assign a new list to the final variable because once you've set it you cant re-set it.

// Json

Quote:

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Originally Posted by kalees

final keyword should not allow to override add elements correct?.can u explain me properly?

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'Override' refers to declaring, when you write a subclass, methods that have the same signature (name, parameters) as methods in the superclass, so when called on a subclass instance, the subclass methods will be called instead of the superclass methods - they 'override' the superclass methods.

Calling a method on an object several times is not overriding, it's just calling a method.