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[Java] ๊ฐ€์ƒ ์Šค๋ ˆ๋“œ (Virtual Thread) ํ›‘์–ด๋ณด๊ธฐ

Java์˜ Thread๋ฅผ ๋ณด๋ฉด ๋Š˜์ƒ ๊ณ ๋ฏผ์ด์—ˆ๋˜ ๋ถ€๋ถ„์ด ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค. Java์˜ Thread API๋Š” ์šด์˜์ฒด์ œ์˜ ์Šค๋ ˆ๋“œ์™€ 1:1๋กœ ๋งคํ•‘๋˜์–ด ์žˆ์–ด ์“ธ ๋•Œ๋งˆ๋‹ค ์ปจํ…์ŠคํŠธ ์Šค์œ„์นญ์œผ๋กœ ์ธํ•œ ๋น„์šฉ ๋ฌธ์ œ๊ฐ€ ๊ฑธ๋ฆผ๋Œ์ด๊ณ , ์„œ๋ฒ„๋ฅผ ๊ฐœ๋ฐœํ•˜๋Š” ์ž…์žฅ์—์„œ ๋Œ€์šฉ๋Ÿ‰ ํŠธ๋ž˜ํ”ฝ์˜ ๋ฐœ์ƒ์„ ๊ณ ๋ คํ•ด์•ผ ํ•œ๋‹ค๋ฉด ์Šค...

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[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”....

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[RxJava] 5. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 3ํŽธ (์ˆ˜ํ•™ ์—ฐ์‚ฐ์ž ๋ฐ ๊ธฐํƒ€ ์—ฐ์‚ฐ์ž)

2021/02/21 - [Programming/Java] - [RxJava] 4. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 2ํŽธ (๊ฒฐํ•ฉ, ์กฐ๊ฑด ์—ฐ์‚ฐ์ž) [RxJava] 4. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 2ํŽธ (๊ฒฐํ•ฉ, ์กฐ๊ฑด ์—ฐ์‚ฐ์ž) 2021/02/07 - [Programm...

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[RxJava] 4. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 2ํŽธ (๊ฒฐํ•ฉ, ์กฐ๊ฑด ์—ฐ์‚ฐ์ž)

2021/02/07 - [Programming/Java] - [RxJava] 3. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 1ํŽธ (์ƒ์„ฑ, ๋ณ€ํ™˜ ์—ฐ์‚ฐ์ž) [RxJava] 3. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 1ํŽธ (์ƒ์„ฑ, ๋ณ€ํ™˜ ์—ฐ์‚ฐ์ž) 2021/01/23 - [Programm...

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[RxJava] 3. Reactive ์—ฐ์‚ฐ์ž ํŒŒํ—ค์ณ๋ณด๊ธฐ 1ํŽธ (์ƒ์„ฑ, ๋ณ€ํ™˜ ์—ฐ์‚ฐ์ž)

2021/01/23 - [Programming/Java] - [RxJava] 2. Reactive ๊ธฐ๋ณธ ์—ฐ์‚ฐ์ž(Operator) - map, filter, reduce [RxJava] 2. Reactive ๊ธฐ๋ณธ ์—ฐ์‚ฐ์ž(Operator) - map, filter, red...

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[RxJava] 2. Reactive ๊ธฐ๋ณธ ์—ฐ์‚ฐ์ž(Operator) - map, filter, reduce

Reactive Programming์—์„œ ๊ฝƒ์ด๋ผ๊ณ  ํ•  ์ˆ˜ ์žˆ๋Š” Reactive Operator์— ๋Œ€ํ•ด ์•Œ์•„๋ณด๋„๋ก ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค. ๋งŒ์•ฝ ์—ฌ๋Ÿฌ๋ถ„๋“ค์ด Java 8์„ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ๋‹ค๋ฉด, ์ด๋Ÿฌํ•œ Reactive ์—ฐ์‚ฐ์ž๊ฐ€ ๋งค์šฐ ์ต์ˆ™ํ•˜์‹ค ์ˆ˜๋„ ์žˆ์Šต๋‹ˆ๋‹ค. RxJava์—์„œ๋Š” Reactive...

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[RxJava] 1. RxJava์˜ ๊ธฐ๋ณธ - Observable

์ง€๋‚œ ํฌ์ŠคํŠธ์—์„œ Observable์— ๋Œ€ํ•ด ๊ฐ„๋‹จํžˆ ๋‹ค๋ค„๋ดค๊ณ , ์ด์— ๋”ฐ๋ฅธ ๋ฆฌ์•กํŠธ ํ•จ์ˆ˜์— ๋Œ€ํ•ด ์•Œ์•„๋ณด๋ฉฐ ๊ฐ ์ฐจ์ด๋ฅผ ์•Œ์•„๋ดค์Šต๋‹ˆ๋‹ค. ์ด๋ฒˆ ํฌ์ŠคํŠธ์—์„œ๋Š” Observable์„ ์ข€ ๋” ์‹ฌ์˜คํ•˜๊ฒŒ ๋‹ค๋ค„๋ณด๊ณ , ์ด์— ์‘ํ•˜๋Š” Single, Maybe ๋“ฑ ๋‹ค์–‘ํ•œ ํด๋ž˜์Šค ๋“ฑ์„ ๊ณต๋ถ€ํ•˜๋ฉด์„œ RxJ...

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[RxJava] RxJava๋กœ ์‹œ์ž‘ํ•˜๋Š” Java Reactive ํ”„๋กœ๊ทธ๋ž˜๋ฐ

Java์—์„œ ์—ฌ๋Ÿฌ ๊ฐ€์ง€์˜ ์ผ์„ ๋™์‹œ์— ์ˆ˜ํ–‰ํ•˜๊ธฐ ์œ„ํ•œ ๋ฐฉ๋ฒ•์—๋Š” ์Šค๋ ˆ๋“œ๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๋ฐฉ๋ฒ•๊ณผ ๋น„๋™๊ธฐ ์ฒ˜๋ฆฌ๋ฅผ ์ด์šฉํ•˜๋Š” ๋ฐฉ๋ฒ•์ด ์žˆ์Šต๋‹ˆ๋‹ค. Java์—์„œ๋„ C++์™€ ๋งˆ์ฐฌ๊ฐ€์ง€๋กœ select ํ•จ์ˆ˜๋ฅผ ์ œ๊ณตํ•˜๊ณ , Thread ๊ฐ์ฒด๋ฅผ ์ œ๊ณตํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ด๋ฅผ ์ด์šฉํ•ด์„œ ๋™์‹œ ์ฒ˜๋ฆฌ๋ฅผ ํ•˜๋Š” ๊ฒƒ์€ ๊ทธ๋ฆฌ...

[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. St...

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[GP] Junit5๋ฅผ ์‚ฌ์šฉํ•œ Java ํ…Œ์ŠคํŠธ ์ฝ”๋“œ ์ž‘์„ฑ

์ด ๊ธ€์€ N.K Dev Lab์—์„œ ์ž‘์„ฑ๋œ ๊ธ€์ž…๋‹ˆ๋‹ค. ์•ˆ๋…•ํ•˜์„ธ์š”. ์˜ค๋Š˜์€ ์œ ๋‹› ํ…Œ์ŠคํŠธ์— ๋Œ€ํ•œ ์ด์•ผ๊ธฐ๋ฅผ ํ•ด๋ณด๊ณ ์ž ํ•ฉ๋‹ˆ๋‹ค. ํ”„๋กœ๊ทธ๋ž˜๋ฐ ํ•˜๋‹ค๋ณด๋ฉด ์ž์‹ ์ด ์ž‘์„ฑํ•œ ์ฝ”๋“œ๊ฐ€ ์›ํ•˜๋Š” ํ˜•ํƒœ๋กœ ์ž‘์„ฑ๋˜์—ˆ๋Š”์ง€ ์•ˆ๋˜์—ˆ๋Š”์ง€๋ฅผ ํ…Œ์ŠคํŠธํ•ด๋ณด๊ณ  ์‹ถ์„ ๋•Œ๊ฐ€ ์žˆ์Šต๋‹ˆ๋‹ค. ์ €๋Š” ์ฒ˜์Œ ํ”„๋กœ๊ทธ๋ž˜๋ฐ์„ GUI ํ”„๋กœ๊ทธ...

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Java Puzzlers - Scraping the Bottom of the Barrel (Google I/O 2011)

ํฌํ„ธ์„ ๋Œ์•„๋‹ค๋‹ˆ๋˜ ์ค‘์— ์žฌ๋ฐŒ๋Š” Java ์š”์†Œ๋ฅผ ๋ฐœ๊ฒฌํ–ˆ์Šต๋‹ˆ๋‹ค. ๋ฐ”๋กœ Google I/O 2011์— ์žˆ์—ˆ๋˜ Java Puzzler๋ผ๋Š” ๊ฒƒ์ธ๋ฐ์š”. ์ด ์˜์ƒ์—์„œ๋Š” ๋ฐœํ‘œ์ž JOSH BLOCH, JEREMY MANSON ๋‘ ์‚ฌ๋žŒ์ด 6๊ฐ€์ง€์˜ Java ํ”„๋กœ๊ทธ๋ž˜๋ฐ ์–ธ์–ด์˜ ํผ์ฆ์„ ๋ฐœํ‘œํ•ฉ...