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並前往https://blog.advenoh.pe.kr/java/%EC%9E%90%EB%B0%948-hashmap-%EB%B3%B4%EB%8B%A4-%EA%B0%84%EA%B2%B0%ED%95%98%EA%B3%A0-%ED%9A%A8%EA%B3%BC%EC%A0%81%EC%9C%BC%EB%A1%9C-%EC%9E%91%EC%84%B1%ED%95%98%EA%B8%B0/

자바8 HashMap 보다 간결하고 효과적으로 작성하기

... map = new HashMap<>(); map.put("John", 5); assertThat(map ... javajava8maphashmapcompute자바자바8맵putifabsentcomputeifpresentcomputeputifabsent.

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