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Number Wrapper classes - autoboxing

 
Ranch Hand
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Does the constructor of Integer class get called, when I execute above line of code?
 
Bartender
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No. The method Integer.valueOf(int i) is called.
 
Anup Om
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My actual confusion is why doesn't below code compile?


where as this compiles?


 
Sheriff
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Auto-boxing only works on literals and variables of the same type. In your second example, you use an explicit method call and the short is widened to an int.
 
Anup Om
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Rob Prime wrote:Auto-boxing only works on literals and variables of the same type.



Thank You, I will keep this in mind.
 
Wouter Oet
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This is a must read about autoboxing.
 
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