Local internal class access local variable __ local inner class

Why the local internal class object accesses the local variable must be added with the final keyword.

in the final analysis, the life cycle is different.

local internal classes require GC calls to reclaim, and local variables are discarded on the stack frame stack.

so it is possible that there are local internal class objects that can access a local variable that does not exist at all, which is not allowed.

as a result, only the final keyword can be added to modify the local variables called by the local internal class object.

There is no need to add the FIANL keyword in the 1.8 version of the JDK, but it is just an illusion and will be implicitly added when compiling.

Moreover, the local variables cannot be modified in the local internal class object in 1.8, which means the implicit final semantics.