関連ワード:  java variable must be final or effectively final    java local variable must be final or effectively final    java variable used in lambda should be final or effectively final    java local variable defined in an enclosing scope must be final or effectively final    java stream local variable defined in an enclosing scope must be final or effectively final    java local variable result defined in an enclosing scope must be final or effectively final    java lambda local variable defined in an enclosing scope must be final or effectively final    java foreach local variable defined in an enclosing scope must be final or effectively final    java error local variable defined in an enclosing scope must be final or effectively final    local variable defined in an enclosing scope must be final or effectively final java 8  
結果 : java variable must be final or effectively final