javax.swing
Class JFrame
java.lang.object - java.awt.Component java.awt.Container java.awt.Window java.awt.Frame javax.swing.JFrame how is the above process...i know that Jframe extends Frame....but what about Window.....does JFrame also extends Window...if yes that means my JFrame object can use functions of JFrame,FrameWindow,Container....etc....

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What you posted refers to the following:
javax.swing.JFrame extends java.awt.Frame
java.awt.Frame extends java.awt.Window
java.awt.Window extends java.awt.Container
java.awt.Container extends java.awt.Component
java.awt.Component extends java.lang.Object

JFrame can use anything that can be used with Frame, Window, Container, Component and Object, in other words. JFrame's parent class (Frame) inherits properties and methods from its parent class (Window), which inherits properties and methods from its parent class (Container), etc. JFrame itself inherits the properties and methods of its parent class (Frame), which means that JFrame can work with anything that Frame provides or inherits.

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"C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off."
-- Bjarne Stroustrup, creator of what is now known as C++
For more quotes by Bjarne Stroustrup, check out http://www.research.att.com/~bs/bs_faq.html#really-say-that.

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There is another easy way to understand Inheritance and Polymorphism (it helps me) is just by thinking that:

javax.swing.JFrame extends java.awt.Frame IS A
java.awt.Frame extends java.awt.Window IS A
java.awt.Window extends java.awt.Container IS A
java.awt.Container extends java.awt.Component IS A
java.awt.Component extends java.lang.Object

So, there is an "IS A" relationship between those classes
I was about to create the tutorial about this in particular, but just wait until I'm done with my summer school, I'm still on the midterm weeks

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does static and final means same...
if they have difference what is it?
does this two statements are same...
public static done=1;
public final done=1;

What does this mean?
public static final done=1;

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when you say final, it means that the variable is "unchanged" a.k.a "final". Sometimes, when we want to work with a team of programmers, or even with ourselves, we want to make sure that a certain variable cannot be changed, whether it's accidentally or purposed of crashing the system. I'm not sure if my explanation is clear enough to you, but hopefully it's helpful

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Something that might help you with the definition of static - static : Java Glossary

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"C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do it blows your whole leg off."
-- Bjarne Stroustrup, creator of what is now known as C++
For more quotes by Bjarne Stroustrup, check out http://www.research.att.com/~bs/bs_faq.html#really-say-that.

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difference between DefaultListModel and LinkedList in Java

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differece between protected variable,public variable and private variable....

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nogono,
I recommend you to learn the basic first before getting into the Data Structure. If you don't even know the difference between:

You won't ever get to understand the higher data structures. The difference between those three are just the access modifier:

protected - anybody from the same package can accesss
private - only this class can access
public - anybody can access

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difference between DefaultListModel and LinkedList in Javai got the basics ...i want answer of above question.....

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