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Constructor question

 
Greenhorn
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Hi,

This question is straight from the KS&BB book.



I don't quite understand how the compilation fails as explained by the author. In Bottom2 the super() would be called, which would be a no-arg constructor to its parent class Top. But since Bottom2's constructor is already overridden with arguments matching the super class constructor there shouldn't be a problem with compilation at least. Correct me if i am wrong here please..
 
Greenhorn
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Hi friend, remember that if you dont write an explicit call to the super constructor with some arguments the compiler try to insert at he first line of the constructor a super no arg call, then reviewing the parent class there is not a no arg constructor so the compilaton process fail

got it?
 
Ranch Hand
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Add "super(s);' as the first line of Bottom2's constructor and it will compile fine.
 
Ranch Hand
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I think in the K&B book they recommend to always create the default constructor if you are overloading it.
 
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