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Doubt regarding a method call.

 
chaitanya karthikk
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Hi all, I have a doubt regarding a method call. The following code is calling method which is having a String argument. Whereas I thought that which execution ambiguity will arise. Can anyone please explain this?

Thank you all in advance, good day.
 
John Jai
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While passing null, it gets associated with the argument with the child in the lowest hierarchy level... In this case String extends from Object...

A similar sample code... Note that when you uncomment the method with Child4 argument, that does not extend the Child3 class, the method call using null gives error.

 
chaitanya karthikk
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Thank you @John
 
Campbell Ritchie
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If you are getting into difficulty about which overloaded method is called when you pass null, you have probably got too many overloaded methods.
 
Campbell Ritchie
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Dennis Deems,
Your post was moved to a new topic.
 
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