๐Ÿง Programming

1) ์ œ๋„ค๋ฆญ์„ ์‚ฌ์šฉํ•˜๋Š” ์ด์œ  (1) ์ œ๋„ค๋ฆญ์ด ์—†๋˜ ์‹œ์ ˆ์˜ Java ์ฝ”๋“œ ์ œ๋„ค๋ฆญ์€ JDK 1.5 ๋ฒ„์ „๋ถ€ํ„ฐ ๋“ฑ์žฅํ•˜๊ฒŒ ๋˜์—ˆ๋Š”๋ฐ ์ œ๋„ค๋ฆญ์ด ์กด์žฌํ•˜์ง€ ์•Š๋˜ ์‹œ์ ˆ์˜ Java ์ฝ”๋“œ๋ฅผ ์‚ดํŽด๋ณด์ž! class FruitBox { public Object fruit; public Object getFruit() { return fruit; } public void setFruit(Object content) { this.fruit = fruit; } } class Apple { } class Banana { } ์œ„์˜ ์ฝ”๋“œ๋ฅผ ๋ณด๋ฉด Apple, Banana ํด๋ž˜์Šค์™€ Apple, Banana์™€ ๊ฐ™์€ ๊ณผ์ผ์„ ๋‹ด๋Š” ํด๋ž˜์Šค์ธ FruitBox๊ฐ€ ์„ ์–ธ๋˜์–ด ์žˆ๋‹ค. FruitBox ํด๋ž˜์Šค์˜ fruit ๋ฉค๋ฒ„ ๋ณ€์ˆ˜๋Š” ๋‹ค์–‘ํ•œ ๊ณผ์ผ ํด๋ž˜์Šค (Appl..
1) ์–ด๋…ธํ…Œ์ด์…˜ (Annotation) (1) ์–ด๋…ธํ…Œ์ด์…˜์ด๋ž€ ์ฝ”๋“œ์—์„œ “@”์œผ๋กœ ์ž‘์„ฑ๋˜๋Š” ์š”์†Œ๋ฅผ ์–ด๋…ธํ…Œ์ด์…˜์ด๋ผ๊ณ  ํ•˜๋ฉฐ, ์–ด๋…ธํ…Œ์ด์…˜์€ ํด๋ž˜์Šค ๋˜๋Š” ์ธํ„ฐํŽ˜์ด์Šค๋ฅผ ์ปดํŒŒ์ผํ•˜๊ฑฐ๋‚˜ ์‹คํ–‰ํ•  ๋•Œ ์–ด๋–ป๊ฒŒ ์ฒ˜๋ฆฌํ•ด์•ผ ํ•  ๊ฒƒ์ธ์ง€๋ฅผ ์•Œ๋ ค์ฃผ๋Š” ์„ค์ • ์ •๋ณด์ด๋‹ค. ์–ด๋…ธํ…Œ์ด์…˜์€ ์ฃผ๋กœ ์„ธ ๊ฐ€์ง€ ์šฉ๋„๋กœ ์‚ฌ์šฉ๋˜์–ด์ง„๋‹ค. โ‘  ์ปดํŒŒ์ผ ์‹œ ์‚ฌ์šฉํ•˜๋Š” ์ •๋ณด ์ „๋‹ฌ โ‘ก ๋นŒ๋“œ ํˆด์ด ์ฝ”๋“œ๋ฅผ ์ž๋™์œผ๋กœ ์ƒ์„ฑํ•  ๋•Œ ์‚ฌ์šฉํ•˜๋Š” ์ •๋ณด ์ „๋‹ฌ โ‘ข ์‹คํ–‰ ์‹œ ํŠน์ • ๊ธฐ๋Šฅ์„ ์ฒ˜๋ฆฌํ•  ๋•Œ ์‚ฌ์šฉํ•˜๋Š” ์ •๋ณด ์ „๋‹ฌ ์ปดํŒŒ์ผ ์‹œ, ์‚ฌ์šฉ๋˜๋Š” ์ •๋ณด ์ „๋‹ฌ์˜ ๋Œ€ํ‘œ์ ์ธ ์˜ˆ๋Š” @Override ์–ด๋…ธํ…Œ์ด์…˜์ด๋‹ค. @Override๋Š” ์ปดํŒŒ์ผ๋Ÿฌ๊ฐ€ ๋ฉ”์†Œ๋“œ ์žฌ์ •์˜ ๊ฒ€์‚ฌ๋ฅผ ํ•˜๋„๋ก ์„ค์ •ํ•˜๋ฉฐ ์ •ํ™•ํžˆ ์žฌ์ •์˜๋˜์ง€ ์•Š์•˜๋‹ค๋ฉด ์ปดํŒŒ์ผ๋Ÿฌ๋Š” ์—๋Ÿฌ๋ฅผ ๋ฐœ์ƒ์‹œํ‚จ๋‹ค. ์–ด๋…ธํ…Œ์ด์…˜์€ ์ž๋ฐ” ํ”„๋กœ๊ทธ๋žจ์„ ๊ฐœ๋ฐœํ•  ๋•Œ ํ•„์ˆ˜์ ์ธ ์š”์†Œ๋กœ ํŠนํžˆ, ์›น ๊ฐœ๋ฐœ์—..
1) ๋ฆฌํ”Œ๋ ‰์…˜ ์ž๋ฐ”๋Š” ํด๋ž˜์Šค์™€ ์ธํ„ฐํŽ˜์ด์Šค์˜ ๋ฉ”ํƒ€ ์ •๋ณด๋ฅผ Class ๊ฐ์ฒด๋กœ ๊ด€๋ฆฌํ•œ๋‹ค. ์—ฌ๊ธฐ์„œ ๋ฉ”ํƒ€ ์ •๋ณด๋ž€ ํŒจํ‚ค์ง€ ์ •๋ณด, ํƒ€์ž… ์ •๋ณด, ๋ฉค๋ฒ„ (์ƒ์„ฑ์ž, ํ•„๋“œ, ๋ฉ”์†Œ๋“œ) ์ •๋ณด ๋“ฑ์„ ๋งํ•œ๋‹ค. ์ด๋Ÿฌํ•œ ๋ฉ”ํƒ€ ์ •๋ณด๋ฅผ ํ”„๋กœ๊ทธ๋žจ์—์„œ ์ฝ๊ณ  ์ˆ˜์ •ํ•˜๋Š” ํ–‰์œ„๋ฅผ ๋ฆฌํ”Œ๋ ‰์…˜์ด๋ผ๊ณ  ํ•œ๋‹ค. (1) Class ๊ฐ์ฒด [Class ๊ฐ์ฒด๋ฅผ ์–ป๊ธฐ ์œ„ํ•œ 3๊ฐ€์ง€ ๋ฐฉ๋ฒ•] Class c1 = ํด๋ž˜์Šค์ด๋ฆ„.class Class c2 = Class.forName(“ํŒจํ‚ค์ง€ ... ํด๋ž˜์Šค์ด๋ฆ„”); Class c3 = ๊ฐ์ฒด์ฐธ์กฐ๋ณ€์ˆ˜.getClass(); [์˜ˆ์‹œ] String str = "hello": Class c1 = String.class; Class c2 = Class.forName("java.lang.String"); Class c3 = str.getClas..
JDK ์„ค์น˜ํ•˜๊ธฐ Adoptium ์‚ฌ์ดํŠธ ์ ‘์† ํ›„ JDK ํŒŒ์ผ ๋‹ค์šด๋ฐ›๊ธฐhttps://adoptium.net/  Home | AdoptiumThe Adoptium® Working Group The Adoptium Working Group promotes and supports high-quality runtimes and associated technology for use across the Java ecosystem. Our vision is to meet the needs of Eclipse and the broader Java community by providing runtimesadoptium.net ํ•ด๋‹น ์‚ฌ์ดํŠธ์— ์ ‘์† ํ›„ ์œ„ ๊ทธ๋ฆผ๋Œ€๋กœ ์šด์˜์ฒด์ œ, ์•„ํ‚คํ…์ฒ˜ (32, 64๋น„ํŠธ), ์›ํ•˜๋Š” ๋ฒ„์ „์„ ์„ ํƒํ•œ..
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'๐Ÿง Programming' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๊ธ€ ๋ชฉ๋ก (3 Page)