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List1

[Java] List to Array(๋ฐฐ์—ด) ๋˜๋Š” Array(๋ฐฐ์—ด) to List ์ฃผ๋กœ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ๋ฌธ์ œ๋ฅผ ํ’€๋ฉด์„œ ์“ธ๋•Œ๋งˆ๋‹ค ์žŠ์–ด๋จน๊ณ  ์ฐพ์•„๋ณด๊ฒŒ ๋˜์–ด์„œ ๊ฐ„๋‹จํ•˜๊ฒŒ ์ •๋ฆฌํ•ด๋ณด์•˜๋‹ค. 1. List to Array List.toArray() List ์˜ toArray() ๋ฉ”์„œ๋“œ๋ฅผ ํ™œ์šฉํ•˜๋Š” ๋ฐฉ๋ฒ•์œผ๋กœ List list = new ArrayList(); String[] arr = list.toArray(new String[0]); ์œ„์™€ ๊ฐ™์ด ๋ฐฐ์—ด ์„ ์–ธ๊ณผ ๋™์‹œ์— ํ• ๋‹น ํ•˜๊ฑฐ๋‚˜ List list = new ArrayList(); String[] arr = new String[list.size()]; list.toArray(arr); ๋ฐฐ์—ด ์„ ์–ธ ํ›„ List ๊ฐ’์„ ์ฑ„์›Œ ๋„ฃ๋Š” ๋ฐฉ๋ฒ•์ด ์žˆ๋‹ค. Stream API Java8 ๋ฒ„์ „ ์ด์ƒ๋ถ€ํ„ฐ ์ œ๊ณต๋˜๋Š” Stream API ๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๋ฐฉ๋ฒ• String[] arr = list.. 2022. 10. 13.
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