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  Java.lang.NoClassDefFoundError:

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  No enclosing instance of type Main is accessible. Must qualify the allocation with an enclosing instance of type Main (e.g. x.new A() where x is an instance of Main).

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  To have a program respond to a mouse click, you should a. write a class called ActionListener with a main() method b. write any actionListener method c. write a class that extends ActionListener d. write a class that implements ActionListener

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  Public void add(int index e element)

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