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try-with-resources文の書き方

Posted at

#動機
try-with-resourcesがイマイチ使いこなせていない。
Java7で導入され、Java9で一部仕様変更があった。
この際、しっかりと使いこなせるように整理したい。

#参考にした資料
The Java® Language Specification
Java SE 11 Edition

#検索キーワード
java spec

#構文規則

TryWithResourcesStatement:
try ResourceSpecification Block [Catches] [Finally]

ResourceSpecification:
( ResourceList [;] )

ResourceList:
Resource {; Resource}

Resource:
{VariableModifier} LocalVariableType Identifier = Expression
VariableAccess

VariableAccess:
ExpressionName
FieldAccess
VariableModifier:
Annotation
final

LocalVariableType:
UnannType
var
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