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How I pass argument as generic?
public class<E extends aninterface> AClass{

    public AClass(){
    }

    public void amethod(E element){
        //something
    }

}

public class B implements aninterface{

}

aninterface f = new B();
AClass<B> ac = new AClass<B>();
ac.amethod(f);

final aninterface f = new B();
final AClass<? super aninterface> ac = new AClass<aninterface>();
ac.amethod(f);

final B f = new B();
final AClass<? super B> ac = new AClass<B>();
ac.amethod(f);