scope of local variable in enhanced for-loop

Question

I have a rather simple question about variable scope.

I am familiar with the Enhanced For-Loops but I do not get why I should declare a new variable to keep each el

Answer 1

Just to have the reference here: The JLS Section 14.14.2, The enhanced for statement defines the enhanced for-loop to have the following structure (relevant for this question):

 EnhancedForStatement:
   for ( {VariableModifier} UnannType VariableDeclaratorId : Expression ) Statement 

where UnannType can be summarized to be "a type" (primitive, reference...). So giving the type of the loop variable is simply obligatory according to the language specification - causing the (admittedly: somewhat confusing) observations described in the question.