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2022. 3. 8. 16:20

[Java] String, StringBuffer, StringBuilder ์ด์ •๋ฆฌ

์˜ค๋Š˜์€ Java์˜ String์— ๋Œ€ํ•ด์„œ ์ด์•ผ๊ธฐํ•ด๋ณด๊ฒ ์Šต๋‹ˆ๋‹ค. Java์—๋Š” ๋ฌธ์ž์—ด์„ ํ‘œํ˜„ํ•˜๊ธฐ ์œ„ํ•œ 3๊ฐ€์ง€ ํด๋ž˜์Šค๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค. String StringBuffer StringBuilder 3๊ฐœ ๋ชจ๋‘ String์„ ํ‘œํ˜„ํ•˜๊ธฐ ์œ„ํ•œ ํด๋ž˜์Šค์ด์ง€๋งŒ ์—ฌ๋Ÿฌ๋ถ„๋“ค์ด ์งš์–ด์•ผํ•  ๊ฒƒ์ด ์žˆ๋Š”๋ฐ์š”. ์ด 3๊ฐ€์ง€๋Š” ๋ชจ๋‘ ๋ฌธ์ž์—ด์„ ํ‘œ๊ธฐํ•˜๊ธฐ ์œ„ํ•œ ๊ฒƒ์ด์ง€๋งŒ ๊ฐ์ž ๊ตฌํ˜„๋˜๋Š” ๋ฐฉ๋ฒ•์ด ์ „ํ˜€ ๋‹ค๋ฅธ ํด๋ž˜์Šค๋“ค์ž…๋‹ˆ๋‹ค. See Java Reference ์ž๋ฐ” ๋ ˆํผ๋Ÿฐ์Šค ๋ฌธ์„œ์— ๋‚˜์™€ ์žˆ๋Š” ์„ธ ๊ฐ€์ง€์˜ ํด๋ž˜์Šค๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์ด ์„ค๋ช…๋˜์–ด ์žˆ์Šต๋‹ˆ๋‹ค String Strings are constant; their values cannot be changed after they are created. String์€ ์ƒ์ˆ˜์ด๋ฉฐ, ๊ฐ’์„ ๋งŒ๋“  ๋’ค์—๋Š” ๋ณ€๊ฒฝํ•  ์ˆ˜ ์—†๋‹ค (Immutable..

[Java] - Java Stream API

Java ์–ธ์–ด๊ฐ€ ๋ฒŒ์จ 11 ๋ฒ„์ „์ด ๋‚˜์˜ค๊ณ  ์žˆ๋„ค์š”. Java๋Š” ์—ญ์‚ฌ๊ฐ€ ๊นŠ๊ณ , ์˜ค๋ž˜๋œ ์–ธ์–ด์ด์ž ๋น„๋‚œ๋„ ๋งŽ์ด ๋ฐ›์€ ์–ธ์–ด์ž…๋‹ˆ๋‹ค. ๊ทธ๋ ‡์ง€๋งŒ ์•„์ง๋„ ๋งŽ์€ ๊ณณ์—์„œ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๊ณ , ๋Œ€์ฒดํ•˜๋Š” ๊ณณ๋„ ์žˆ์Šต๋‹ˆ๋‹ค. ์˜ค๋Š˜์€ Java 8์—์„œ ๋“ฑ์žฅํ•œ Stream์— ๋Œ€ํ•ด ์ด์•ผ๊ธฐํ•ด๋ณด๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค. Stream API Stream ? ํ˜น์‹œ ๊ทธ๊ฑฐ, Buffer ๋ณด๋‹ค ์†๋„๊ฐ€ ๊ฒ๋‚˜ ๋น ๋ฅธ ๊ทธ Stream ? ๋„ค, ๊ทธ๊ฑด ์•„๋‹™๋‹ˆ๋‹ค. Java์—์„œ Stream์€ ํ•จ์ˆ˜ํ˜• ํ”„๋กœ๊ทธ๋ž˜๋ฐ์„ ๊ตฌํ˜„ํ•˜๊ธฐ ์œ„ํ•œ ๊ธฐ์ˆ  ์ค‘ ํ•˜๋‚˜๋กœ, Java 8์—์„œ ์ƒˆ๋กœ์ด ๋“ฑ์žฅํ•˜์˜€์Šต๋‹ˆ๋‹ค. Java 8 ์ด์ „์—๋Š” ๋ฐฐ์—ด์ด๋‚˜ Collections์˜ ์ž๋ฃŒ ๊ตฌ์กฐ ์ธ์Šคํ„ด์Šค๋ฅผ ๋‹ค๋ฃจ๊ธฐ ์œ„ํ•ด for ๋ฌธ์ด๋‚˜ foreach ๋ฌธ์„ ์‚ฌ์šฉํ•˜์—ฌ ์š”์†Œ๋ฅผ ํ•˜๋‚˜์”ฉ ๊บผ๋‚ด์—ˆ์ง€์š”. ๊ฐ„๋‹จํ•œ ์•Œ๊ณ ๋ฆฌ์ฆ˜์„ ์งœ๋Š” ๊ฒƒ์ด๋ผ๋ฉด, ํฐ ์ƒ๊ด€์ด ์—†..

2019. 12. 26. 13:26

[Spring Cloud] - 2. Github and Configuration Server

์•ˆ๋…•ํ•˜์„ธ์š”. ์ง€๋‚œ ์‹œ๊ฐ„์—๋Š” Spring Cloud์˜ Configuration Server๋ฅผ ๋กœ์ปฌ ํ™˜๊ฒฝ์˜ ์„ค์ • ํŒŒ์ผ์„ ํ†ตํ•˜์„œ ๊ตฌ์„ฑํ•˜๋Š” ๋ฐฉ๋ฒ•์— ๋Œ€ํ•ด ์•Œ์•„๋ดค์Šต๋‹ˆ๋‹ค. ๋กœ์ปฌ ๋‚ด์— ์žˆ๋Š” ์„ค์ • ํŒŒ์ผ์„ ์ง์ ‘ ์ž‘์„ฑํ•˜์—ฌ ์ด๋ฅผ Pull ๋ฐฉ์‹์œผ๋กœ ์ด์šฉํ•  ์ˆ˜ ์žˆ๋„๋ก ๋ณ„๋„์˜ ๊ตฌ์„ฑ ์„œ๋ฒ„๋ฅผ ์ž‘์„ฑํ•˜๋Š” ๊ฒƒ์€ ๋งค์šฐ ํšจ์œจ์ ์œผ๋กœ ์„œ๋ฒ„์˜ ๊ตฌ์„ฑ ์„ค์ •์„ ๋ณ€๊ฒฝํ•˜๊ณ  ์ƒˆ๋กœ์ด ์ž‘์„ฑํ•˜๋Š” ๋ฐ ์šฉ์ดํ•ฉ๋‹ˆ๋‹ค. ๊ทธ๋Ÿฐ๋ฐ, ์—ฌ๊ธฐ์— Git์„ ์ถ”๊ฐ€ํ•œ๋‹ค๋ฉด ์–ด๋–จ๊นŒ์š”? ๊ธฐ์กด์˜ ์„ค์ •์—์„œ ์ƒˆ๋กœ์šด ์„ค์ •์œผ๋กœ ๋ณ€๊ฒฝํ•œ ๋’ค, ์–ด๋– ํ•œ ๋ฌธ์ œ์ ์ด ์ƒ๊ฒผ๋‹ค๊ฑฐ๋‚˜ ์ด์Šˆ๊ฐ€ ๋ฐœ์ƒ๋œ๋‹ค๋ฉด ๋กค๋ฐฑ์„ ํ•˜์—ฌ์•ผ ํ•ฉ๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ ํŒŒ์ผ ์‹œ์Šคํ…œ์—์„œ ๋กค๋ฐฑ์„ ํ•  ์ˆ˜ ์žˆ๋Š” ๊ฒƒ์€ Volume Shadow Copy ์ •๋„๋‚˜ ํ˜น์€ RAID ๋ ˆ๋ฒจ์—์„œ ์ œ๊ณตํ•˜๋Š” Snapshot, BRTFS์—์„œ ์ œ๊ณตํ•˜๋Š” Snapshot์ผ ๊ฒƒ์ž…๋‹ˆ๋‹ค. ํ•˜์ง€๋งŒ ..

Neon K.I.D

E-mail: contact@neonkid.xyz

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