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byte promotion

 
Greenhorn
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Hello,

I'm having difficulty understanding why I can't write code where a byte (8-bits) is promoted to a char (16-bits).

For example the following code causes the compiler to complain of a possible loss of precision:



Please could someone help me understand why this is the case?

Thanks!

Dave
 
Rancher
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See this post: https://coderanch.com/t/268738/java-programmer-SCJP/certification/assignement-final-local-variable#1247826
 
Dave Ranson
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Thanks for your reply, that answers my question exactly!

Cheers
 
Sheriff
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A byte can have a value between -128 and -1 whereas char cannot. If the byte was negative you loose that information in the char.
 
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