๊ด€๋ฆฌ ๋ฉ”๋‰ด

๋ชฉ๋กoptional null (1)

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[Java] ์˜ฌ๋ฐ”๋ฅธ Optional ์‚ฌ์šฉ์œผ๋กœ API ์„ค๊ณ„ํ•˜๊ธฐ

API๋ฅผ ์„ค๊ณ„ํ•  ๋•Œ, ์‚ฌ์šฉ์ž๊ฐ€ ๋ฉ”์„œ๋“œ ์‹œ๊ทธ๋‹ˆ์ฒ˜๋งŒ ๋ณด๊ณ ๋„ ๋ฐ˜ํ™˜๊ฐ’์ด ์„ ํƒํ˜•์ธ์ง€, ์ฆ‰ ๊ฐ’์ด ์กด์žฌํ•˜์ง€ ์•Š์„ ์ˆ˜ ์žˆ์Œ์„ ์‰ฝ๊ฒŒ ์ธ์ง€ํ•  ์ˆ˜ ์žˆ๋‹ค๋ฉด ํ›จ์”ฌ ์•ˆ์ „ํ•˜๊ณ  ๋ช…๋ฃŒํ•œ API๋ฅผ ์ œ๊ณตํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์ด๋‹ค. ์ด ๊ธ€์—์„œ๋Š” Java 8๋ถ€ํ„ฐ ๋„์ž…๋œ Optional ํด๋ž˜์Šค๋ฅผ ํ™œ์šฉํ•ด API ์„ค๊ณ„์˜ ๋ช…ํ™•์„ฑ์„ ๋†’์ด๊ณ , NullPointerException๊ณผ ๊ฐ™์€ ์˜ค๋ฅ˜๋ฅผ ์˜ˆ๋ฐฉํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์•Œ์•„๋ณด๋ ค ํ•œ๋‹ค.1. Optional์˜ ๊ธฐ๋ณธ ๊ฐœ๋…public final class Optionalextends ObjectA container object which may or may not contain a non-null value. - ๊ณต์‹ ๋ฌธ์„œ ์ •์˜Java 8 ๋ถ€ํ„ฐ ๋„์ž…๋œ Optional๋Š” null์ด ๋  ์ˆ˜ ์žˆ๋Š” ๊ฐ’์„ ๊ฐ์‹ธ๋Š” ๋ž˜ํผ(wrapp..

Java 2025. 2. 26. 10:32