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- [10장 null 대신 Optional](https://incheol-jung.gitbook.io/docs/study/java-8-in-action/2020-03-10-java8inaction-chap10.md)
- [11장 CompletableFuture: 조합할 수 있는 비동기 프로그래밍](https://incheol-jung.gitbook.io/docs/study/java-8-in-action/2020-03-10-java8inaction-chap11.md)
- [12장 새로운 날짜와 시간 API](https://incheol-jung.gitbook.io/docs/study/java-8-in-action/2020-03-10-java8inaction-chap12.md)
- [13장 함수형 관점으로 생각하기](https://incheol-jung.gitbook.io/docs/study/java-8-in-action/2020-03-10-java8inaction-chap13.md)
- [14장 함수형 프로그래밍 기법](https://incheol-jung.gitbook.io/docs/study/java-8-in-action/2020-03-10-java8inaction-chap14.md)

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