{"id":6964,"date":"2022-11-10T12:27:45","date_gmt":"2022-11-10T03:27:45","guid":{"rendered":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=6964"},"modified":"2022-11-10T12:30:42","modified_gmt":"2022-11-10T03:30:42","slug":"java-hashmap-%ec%b6%9c%eb%a0%a5%ed%95%98%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/www.skyer9.pe.kr\/wordpress\/?p=6964","title":{"rendered":"Java – HashMap \ucd9c\ub825\ud558\uae30"},"content":{"rendered":"

Java – HashMap \ucd9c\ub825\ud558\uae30<\/h1>\n

Map \uc5d0 \ub4e4\uc5b4\uc788\ub294 \ub370\uc774\ud0c0\ub97c \ubf51\uc544\ub0b4\ub294 \ubc29\ubc95\uc744 \uc815\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n

\ub370\uc774\ud0c0 \uc900\ube44<\/h2>\n
Map<String, String> map = new HashMap<>();\nmap.put("key01", "value01");\nmap.put("key02", "value02");\nmap.put("key03", "value03");\nmap.put("key04", "value04");\nmap.put("key05", "value05");<\/code><\/pre>\n
entrySet()<\/h2>\n
key\/value \ub97c \ud55c\ubc88\uc5d0 \ucd94\ucd9c\ud569\ub2c8\ub2e4.<\/p>\n
\uc815\ub82c\uc774 \uc548\ub41c \uc0c1\ud0dc\ub85c \ub79c\ub364\ud558\uac8c \ub370\uc774\ud0c0\uac00 \ub098\uc635\ub2c8\ub2e4.
\n\uc815\ub82c\ub41c \ub370\uc774\ud0c0\uac00 \ud544\uc694\ud558\uba74 \uc544\ub798\uc5d0\uc11c \uc124\uba85\ud558\ub294 stream().sorted()<\/code> \ub97c \uc774\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4.<\/p>\n
for (Map.Entry<String, String> entry : map.entrySet()) {\n    System.out.println("[key]:" + entry.getKey() + ", [value]:" + entry.getValue());\n}<\/code><\/pre>\n
keySet()<\/h2>\n
key \ub9cc \ucd94\ucd9c\ud569\ub2c8\ub2e4.
\nvalue \uac00 \ud544\uc694\ud558\uba74 \ucd94\uac00\uc791\uc5c5\uc774 \ud544\uc694\ud569\ub2c8\ub2e4.<\/p>\n
\uc815\ub82c\uc774 \uc548\ub41c \uc0c1\ud0dc\ub85c \ub79c\ub364\ud558\uac8c \ub370\uc774\ud0c0\uac00 \ub098\uc635\ub2c8\ub2e4.<\/p>\n
for (String key : map.keySet()) {\n    String value = map.get(key);\n    System.out.println("[key]:" + key + ", [value]:" + value);\n}<\/code><\/pre>\n
Lambda<\/h2>\n
map.forEach((key, value) -> {\n    System.out.println("[key]:" + key + ", [value]:" + value);\n});<\/code><\/pre>\n
stream()<\/h2>\n
map.entrySet().stream().forEach(entry-> {\n    System.out.println("[key]:" + entry.getKey() + ", [value]:"+entry.getValue());\n});<\/code><\/pre>\n
stream().sorted()<\/h2>\n
\uc544\ub798\uc758 \ubc29\ubc95\uc73c\ub85c \uc815\ub82c\ub41c \ucd9c\ub825\uac12\uc744 \uc5bb\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
map.entrySet().stream().sorted(Map.Entry.comparingByKey()).forEach(entry-> {\n    System.out.println("[key]:" + entry.getKey() + ", [value]:"+entry.getValue());\n});\n\nmap.entrySet().stream().sorted(Map.Entry.comparingByKey(Comparator.reverseOrder())).forEach(entry-> {\n    System.out.println("[key]:" + entry.getKey() + ", [value]:"+entry.getValue());\n});<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Java – HashMap \ucd9c\ub825\ud558\uae30 Map \uc5d0 \ub4e4\uc5b4\uc788\ub294 \ub370\uc774\ud0c0\ub97c \ubf51\uc544\ub0b4\ub294 \ubc29\ubc95\uc744 \uc815\ub9ac\ud569\ub2c8\ub2e4. \ub370\uc774\ud0c0 \uc900\ube44 Map<String, String> map = new HashMap<>(); map.put("key01", "value01"); map.put("key02", "value02"); map.put("key03", "value03"); map.put("key04", "value04"); map.put("key05", "value05"); entrySet() key\/value \ub97c \ud55c\ubc88\uc5d0 \ucd94\ucd9c\ud569\ub2c8\ub2e4. \uc815\ub82c\uc774 \uc548\ub41c \uc0c1\ud0dc\ub85c \ub79c\ub364\ud558\uac8c \ub370\uc774\ud0c0\uac00 \ub098\uc635\ub2c8\ub2e4. \uc815\ub82c\ub41c \ub370\uc774\ud0c0\uac00 \ud544\uc694\ud558\uba74 \uc544\ub798\uc5d0\uc11c \uc124\uba85\ud558\ub294 stream().sorted() \ub97c \uc774\uc6a9\ud574\uc57c \ud569\ub2c8\ub2e4. for (Map.Entry<String, String> entry : map.entrySet())\u2026 Read More »<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-6964","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6964","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6964"}],"version-history":[{"count":2,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6964\/revisions"}],"predecessor-version":[{"id":6966,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6964\/revisions\/6966"}],"wp:attachment":[{"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.skyer9.pe.kr\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}