Java\ub294 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub85c\uc11c \ub9ce\uc740 \uac1c\ubc1c\uc790\ub4e4\uc774 \uc0ac\uc6a9\ud558\ub294 \uc5b8\uc5b4 \uc911 \ud558\ub098\uc774\ub2e4. Java\uc5d0\uc11c\ub294 \uc778\ud130\ud398\uc774\uc2a4\ub77c\ub294 \uae30\ub2a5\uc744 \uc81c\uacf5\ud558\uba70, \uc774\ub97c \uc774\uc6a9\ud558\uc5ec \ub2e4\uc591\ud55c \ub514\uc790\uc778 \ud328\ud134\uc744 \uad6c\ud604\ud560 \uc218 \uc788\ub2e4. \uc774\ubc88 \uae00\uc5d0\uc11c\ub294 \uadf8 \uc911\uc5d0\uc11c\ub3c4 \uc635\uc800\ubc84 \ud328\ud134\uc744 \uad6c\ud604\ud558\ub294 \ubc29\ubc95\uc5d0 \ub300\ud574\uc11c \uc54c\uc544\ubcf4\ub824 \ud55c\ub2e4.<\/p>\n
Java\uc5d0\uc11c \uc778\ud130\ud398\uc774\uc2a4\ub294 \ud074\ub798\uc2a4\uc640 \uc720\uc0ac\ud55c \ud615\ud0dc\ub97c \uac16\uace0 \uc788\uc9c0\ub9cc, \ud074\ub798\uc2a4\uc640 \ub2ec\ub9ac \ucd94\uc0c1 \uba54\uc18c\ub4dc\uc640 \uc815\uc801 \uc0c1\uc218\ub9cc\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4. \uc778\ud130\ud398\uc774\uc2a4\ub294 \ub2e4\ub978 \ud074\ub798\uc2a4\uc5d0\uc11c \ud574\ub2f9 \uba54\uc18c\ub4dc\ub97c \uad6c\ud604\ud558\ub3c4\ub85d \uac15\uc81c\ud558\ub294 \uc5ed\ud560\uc744 \ud560 \uc218 \uc788\uc73c\uba70, \uc774\ub294 \ub2e4\ud615\uc131\uacfc \uacb0\ud569\ub3c4\ub97c \ub0ae\ucd94\uc5b4 \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \ub192\uc774\ub294 \ub370 \ub3c4\uc6c0\uc744 \uc900\ub2e4. \uc778\ud130\ud398\uc774\uc2a4\ub294 \ub2e4\ub978 \ud074\ub798\uc2a4\uc640 \ub9c8\ucc2c\uac00\uc9c0\ub85c \ud328\ud0a4\uc9c0 \uc548\uc5d0 \uc800\uc7a5\ub418\uba70, \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\ub294 \ud074\ub798\uc2a4\ub294 implements \ud0a4\uc6cc\ub4dc\ub97c \uc0ac\uc6a9\ud55c\ub2e4.<\/p>\n
\uc635\uc800\ubc84 \ud328\ud134\uc740 \uac1d\uccb4\uc758 \uc0c1\ud0dc \ubcc0\ud654\ub97c \uad00\ucc30\ud558\uace0, \uc774\ub97c \ubbf8\ub9ac \ub4f1\ub85d\ud55c \ub2e4\ub978 \uac1d\uccb4\uc5d0\uac8c \uc54c\ub9ac\ub294 \ub514\uc790\uc778 \ud328\ud134\uc774\ub2e4. \uc774\ub97c \uad6c\ud604\ud558\uae30 \uc704\ud574\uc11c\ub294 Subject(\uc8fc\uccb4)\uc640 Observer(\uad00\ucc30\uc790) \ub450 \uac00\uc9c0 \uc5ed\ud560\uc744 \ud558\ub294 \ud074\ub798\uc2a4\uac00 \ud544\uc694\ud558\ub2e4. Subject \ud074\ub798\uc2a4\ub294 \uc0c1\ud0dc \ubcc0\ud654\ub97c \uc54c\ub9ac\ub294 notifyObservers() \uba54\uc18c\ub4dc\ub97c \uac00\uc9c0\uace0 \uc788\uc73c\uba70, \uc774 \uba54\uc18c\ub4dc\ub294 Observer \ud074\ub798\uc2a4\uc5d0\uc11c \uad6c\ud604\ud55c update() \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud558\uc5ec \uc0c1\ud0dc \ubcc0\ud654\ub97c \uc804\ub2ec\ud55c\ub2e4. Observer \ud074\ub798\uc2a4\ub294 Subject \ud074\ub798\uc2a4\uc758 \uc0c1\ud0dc \ubcc0\ud654\ub97c \uac10\uc2dc\ud558\uba70, \uc0c1\ud0dc \ubcc0\ud654\uac00 \ubc1c\uc0dd\ud558\uba74 update() \uba54\uc18c\ub4dc\ub97c \ud1b5\ud574 \uc0c1\ud0dc\ub97c \ucc98\ub9ac\ud55c\ub2e4.<\/p>\n
Java\uc5d0\uc11c\ub294 \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud65c\uc6a9\ud558\uc5ec \uc635\uc800\ubc84 \ud328\ud134\uc744 \uad6c\ud604\ud560 \uc218 \uc788\ub2e4. Subject \ud074\ub798\uc2a4\ub294 Observer \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\uace0, notifyObservers() \uba54\uc18c\ub4dc\uc5d0\uc11c Observer \uc778\ud130\ud398\uc774\uc2a4\uc758 update() \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud558\uc5ec \uc0c1\ud0dc \ubcc0\ud654\ub97c \uc54c\ub9b0\ub2e4. Observer \ud074\ub798\uc2a4\ub294 Observer \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\uc5ec update() \uba54\uc18c\ub4dc\ub97c \uad6c\ud604\ud558\uba70, \uc0c1\ud0dc \ubcc0\ud654\uac00 \ubc1c\uc0dd\ud558\uba74 \uc774\ub97c \ucc98\ub9ac\ud55c\ub2e4.<\/p>\n
\uc544\ub798\ub294 Java \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc0ac\uc6a9\ud55c \uac04\ub2e8\ud55c \uc608\uc2dc \ucf54\ub4dc\uc774\ub2e4.<\/p>\n
interface Observer {\n void update(String message);\n}\n\nclass Subject {\n List observers = new ArrayList();\n\n public void attach(Observer observer) {\n observers.add(observer);\n }\n\n public void detach(Observer observer) {\n observers.remove(observer);\n }\n\n public void notifyObservers(String message) {\n for (Observer observer : observers) {\n observer.update(message);\n }\n }\n}\n\nclass ConcreteObserver implements Observer {\n public void update(String message) {\n System.out.println(\"Received message: \" + message);\n }\n}\n\npublic class Main {\n public static void main(String[] args) {\n Subject subject = new Subject();\n Observer observer = new ConcreteObserver();\n subject.attach(observer);\n subject.notifyObservers(\"Hello, World!\");\n }\n}<\/code><\/pre>\n\uc704 \ucf54\ub4dc\uc5d0\uc11c Subject \ud074\ub798\uc2a4\ub294 Observer \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\uace0, notifyObservers() \uba54\uc18c\ub4dc\uc5d0\uc11c Observer \uc778\ud130\ud398\uc774\uc2a4\uc758 update() \uba54\uc18c\ub4dc\ub97c \ud638\ucd9c\ud55c\ub2e4. ConcreteObserver \ud074\ub798\uc2a4\ub294 Observer \uc778\ud130\ud398\uc774\uc2a4\ub97c \uad6c\ud604\ud558\uc5ec update() \uba54\uc18c\ub4dc\ub97c \uad6c\ud604\ud558\uba70, \uc0c1\ud0dc \ubcc0\ud654\uac00 \ubc1c\uc0dd\ud558\uba74 \uc774\ub97c \ucc98\ub9ac\ud55c\ub2e4. Main \ud074\ub798\uc2a4\uc5d0\uc11c\ub294 Subject \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud558\uace0, ConcreteObserver \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud558\uc5ec Subject \ud074\ub798\uc2a4\uc5d0 \ub4f1\ub85d\ud558\uace0, \uc0c1\ud0dc \ubcc0\ud654\ub97c \uc54c\ub9b0\ub2e4.<\/p>\n
Java\uc5d0\uc11c\ub294 \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud65c\uc6a9\ud558\uc5ec \ub2e4\uc591\ud55c \ub514\uc790\uc778 \ud328\ud134\uc744 \uad6c\ud604\ud560 \uc218 \uc788\uc73c\uba70, \uc635\uc800\ubc84 \ud328\ud134 \ub610\ud55c \uc778\ud130\ud398\uc774\uc2a4\ub97c \ud65c\uc6a9\ud558\uc5ec \uad6c\ud604\ud560 \uc218 \uc788\ub2e4. \uc635\uc800\ubc84 \ud328\ud134\uc740 \uc0c1\ud0dc \ubcc0\ud654\ub97c \uac10\uc2dc\ud558\uace0, \uc774\ub97c \ucc98\ub9ac\ud558\ub294 \ub370 \uc720\uc6a9\ud55c \ub514\uc790\uc778 \ud328\ud134\uc73c\ub85c\uc11c, Java\uc5d0\uc11c \uc778\ud130\ud398\uc774\uc2a4\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac04\ub2e8\ud558\uac8c \uad6c\ud604\ud560 \uc218 \uc788\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
“\uc790\ubc14 \uc778\ud130\ud398\uc774\uc2a4\ub85c \uc635\uc800\ubc84 \ud328\ud134 \uad6c\ud604\ud558\uae30” – \uae30\uc220\uc801\uc778 \uae00\ub85c \uc791\uc131\ub41c \uc804\ubb38\uc801\uc778 \ub0b4\uc6a9\uc744 \ub2f4\uc740 40~60\uc790\uc758 \uae00\uc785\ub2c8\ub2e4.<\/p>\n","protected":false},"author":1,"featured_media":12633,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1957],"tags":[2188,3888,2584,906],"class_list":["post-25375","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development","tag-public","tag-static","tag-system","tag-world"],"acf":[],"_links":{"self":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts\/25375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/comments?post=25375"}],"version-history":[{"count":0,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/posts\/25375\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/media\/12633"}],"wp:attachment":[{"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/media?parent=25375"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/categories?post=25375"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/m9js.shop\/blog\/wp-json\/wp\/v2\/tags?post=25375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}