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Anonymous inner class

 
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1)i know that an anonymous inner class can extend one subclass
or implement one interface but it cannot do both my questions is
here it is implementing only one interface but even then
the compiler error is generated at line1
 
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The syntax of this line is just wrong:

You can't add "implements B" at that place. You cannot make an anonymous class implement an interface in that way.

You can create an anonymous class that implements an interface like this:
 
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