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doubt in function overloading

 
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hello friends ..
Why this follwing code is giving "PowerSupply(String) executed" as output .... why not the object version
 
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Hello.

The reason is simple. If you read the Java Language Specification you will find that, and I quote:


The null type has one value, the null reference, represented by the literal null, which is formed from ASCII characters. A null literal is always of the null type.


NullLiteral:
null



That's why it's treated as a String and not as a Object.

Miguel
 
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This is a case of executing the 'most specific method'. JLS - Maximally specific method
 
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