{"id":12502,"date":"2022-07-25T16:42:00","date_gmt":"2022-07-25T07:42:00","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=12502"},"modified":"2022-07-25T17:00:01","modified_gmt":"2022-07-25T08:00:01","slug":"java%ec%9d%98-reflection%ec%9d%84-%ec%9d%b4%ec%9a%a9%ed%95%9c-api","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=12502","title":{"rendered":"Java\uc758 Reflection\uc744 \uc774\uc6a9\ud55c API"},"content":{"rendered":"

\uc774\ubbf8 \uc644\uc131\ub418\uc5b4 \ucef4\ud30c\uc77c\uae4c\uc9c0 \ub418\uc5b4 \ubc30\ud3ec\ub41c \ud504\ub85c\uadf8\ub7a8\uc5d0 \ub300\ud55c \uae30\ub2a5 \ud655\uc7a5\uc744 \uc704\ud574\uc11c Reflection API\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc740 \uc774 \ubaa9\uc801\uc744 \uc704\ud574 \uc77c\ub2e8 \ud544\uc694\ud55c \ucf54\ub4dc\ub97c \uc815\ub9ac\ud55c \uae00 \uc785\ub2c8\ub2e4.<\/p>\n

Java\uc5d0\uc11c \uc5b4\ub5a4 \ud0c0\uc785\uc5d0 \ub300\ud55c \uc774\ub984\uc744 \ubb38\uc790\uc5f4\ub85c\ub9cc \uc54c\uace0 \uc788\uc744 \ub54c, \uadf8 \ud0c0\uc785\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud55c \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n

\r\ntry {\r\n\tClass<?> clazz = Class.forName(\"tstConstructor.service.FirstService\");\r\n\t\/\/Class<?> clazz = tstConstructor.service.FirstService.class;\r\n\t\r\n\tConstructor<?> constructor = clazz.getConstructor(String.class);\r\n\tServiceable instance = (Serviceable)constructor.newInstance(\"Jack\");\r\n\tinstance.run();\r\n} catch (Exception e) {\r\n\te.printStackTrace();\r\n}\t\r\n<\/pre>\n
\uc704\uc758 \ucf54\ub4dc\uc5d0\uc11c FirstService \ud074\ub798\uc2a4\uc758 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
\r\npackage tstConstructor.service;\r\n\r\npublic class FirstService implements Serviceable {\r\n\tprivate String _name;\r\n\t\r\n\tpublic FirstService(String name) {\r\n\t\tthis._name = name;\r\n\t}\r\n\t\r\n\t@Override\r\n\tpublic void run() {\r\n\t\tSystem.out.println(\"Hello, my name is \" + this._name);\r\n\t}\r\n}\r\n<\/pre>\n
\ub610\ud55c Serviceable \uc778\ud130\ud398\uc774\uc2a4\uc758 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
\r\npackage tstConstructor.service;\r\n\r\npublic interface Serviceable {\r\n\tvoid run();\r\n}\r\n<\/pre>\n
\ub610\ud55c Java\uc5d0\uc11c \uc5b4\ub5a4 \ud0c0\uc785\uc5d0 \ub300\ud55c \uc774\ub984\uc744 \ubb38\uc790\uc5f4\ub85c\ub9cc \uc54c\uace0 \uc788\uc744 \ub54c, \uadf8 \ud0c0\uc785\uc758 \uc815\uc801 \ud544\ub4dc\uac12\uc744 \uc5bb\uae30 \uc704\ud55c \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
\r\ntry {\r\n\tClass<?> clazz = Class.forName(\"tstConstructor.service.Gizmo\");\r\n\t\/\/Field field = Gizmo.class.getField(\"NAME\");\r\n\tField field = clazz.getField(\"NAME\");\r\n\tClass<?> fieldType = field.getType();\r\n\tif(fieldType == String.class){\r\n\t\tSystem.out.println(field.get(null).toString());\r\n\t} else if(fieldType == double.class){\r\n\t    System.out.println(field.getDouble(null)); \r\n\t}\r\n} catch (Exception e) {\r\n\te.printStackTrace();\r\n}\r\n<\/pre>\n
Gizmo \ud074\ub798\uc2a4\uc758 \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n
\r\npackage tstConstructor.service;\r\n\r\npublic class Gizmo {\r\n\tpublic static String NAME = \"GIZMO\";\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\uc774\ubbf8 \uc644\uc131\ub418\uc5b4 \ucef4\ud30c\uc77c\uae4c\uc9c0 \ub418\uc5b4 \ubc30\ud3ec\ub41c \ud504\ub85c\uadf8\ub7a8\uc5d0 \ub300\ud55c \uae30\ub2a5 \ud655\uc7a5\uc744 \uc704\ud574\uc11c Reflection API\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uae00\uc740 \uc774 \ubaa9\uc801\uc744 \uc704\ud574 \uc77c\ub2e8 \ud544\uc694\ud55c \ucf54\ub4dc\ub97c \uc815\ub9ac\ud55c \uae00 \uc785\ub2c8\ub2e4. Java\uc5d0\uc11c \uc5b4\ub5a4 \ud0c0\uc785\uc5d0 \ub300\ud55c \uc774\ub984\uc744 \ubb38\uc790\uc5f4\ub85c\ub9cc \uc54c\uace0 \uc788\uc744 \ub54c, \uadf8 \ud0c0\uc785\uc758 \uc778\uc2a4\ud134\uc2a4\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud55c \ucf54\ub4dc\ub294 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4. try { Class<?> clazz = Class.forName(“tstConstructor.service.FirstService”); \/\/Class<?> clazz = tstConstructor.service.FirstService.class; Constructor<?> constructor … <\/p>\n
\ub354 \ubcf4\uae30 “Java\uc758 Reflection\uc744 \uc774\uc6a9\ud55c API”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[],"class_list":["post-12502","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/12502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=12502"}],"version-history":[{"count":7,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/12502\/revisions"}],"predecessor-version":[{"id":12509,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/12502\/revisions\/12509"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=12502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=12502"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=12502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}