{"id":2440,"date":"2016-09-21T14:07:44","date_gmt":"2016-09-21T14:07:44","guid":{"rendered":"http:\/\/www.gisdeveloper.co.kr\/?p=2440"},"modified":"2016-09-21T14:07:44","modified_gmt":"2016-09-21T14:07:44","slug":"java-java8-%eb%9e%8c%eb%8b%a4-%ed%91%9c%ed%98%84%ec%8b%9dlambda-expressions","status":"publish","type":"post","link":"http:\/\/www.gisdeveloper.co.kr\/?p=2440","title":{"rendered":"[Java] Java8, \ub78c\ub2e4 \ud45c\ud604\uc2dd(Lambda expressions)"},"content":{"rendered":"

\ub9ce\uc740 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uc5d0\uc11c \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc740 \ud55c\ubc88 \uc0ac\uc6a9\ud558\uace0 \ubc84\ub9b4 \ud568\uc218\ub97c \uc815\uc758\ud558\uae30 \uc704\ud55c \uc6a9\ub3c4\ub85c \ub9ce\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ubb3c\ub860 \uc774 \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc5d0 \uc758\ud574 \ub9cc\ub4e4\uc5b4\uc9c4 \ud568\uc218\ub97c \ubcc0\uc218\uc5d0 \ub2f4\uc544 \ub450\ubc88 \uc774\uc0c1 \uc0ac\uc6a9\ud560 \uc218\ub3c4 \uc788\uc9c0\ub9cc… \uc5b4\ucc0c\ub418\uc5c8\ub4e0, \ub78c\ub2e4\ub294 \ube60\ub974\uac8c \ud568\uc218\ub97c \ub9cc\ub4e4\uc5b4 \uc0ac\uc6a9\ud558\uace0\ub294, \ubc84\ub9ac\ub294 \uc6a9\ub3c4\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/P><\/p>\n

Java 8\uc5d0\uc11c \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc744 \uc9c0\uc6d0\ud558\uace0 \uc788\ub294\ub370\uc694. \ubb38\uc790\uc5f4 \uc694\uc18c\ub97c \uac00\uc9c0\ub294 \ub9ac\uc2a4\ud2b8\ub97c \uc815\ub82c\ud558\ub294 \uc608\ub97c \ud1b5\ud574 \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc744 \uc0b4\ud3b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc815\ub82c\ud560 \ubb38\uc790\uc5f4 \ub9ac\uc2a4\ud2b8\ub85c \uc0ac\uc6a9\ud560 names \uac1d\uccb4 \ubcc0\uc218\ub294 \uc544\ub798\uc640 \uac19\uc2b5\ub2c8\ub2e4.<\/P><\/p>\n

\nList names = \n    Arrays.asList(\"\uac80\uc18c\", \"\uacb8\uc190\", \"\uba85\uc0c1\", \"\uc695\uc2ec\", \"\ud0d0\ud558\ub294 \ub9c8\uc74c\", \"\uacbd\uc194\", \"\uad50\ub9cc\", \"\uc5b4\uc9c8\uc9c0\ubabb\ud568\");\n<\/pre>\n
\ub78c\ub2e4 \ud45c\ud604\uc2dd\uc774 \uc544\ub2cc \uc6b0\ub9ac\uac00 \uc774\ubbf8 \uc54c\uace0 \uc788\ub294 \ubc29\uc2dd\uc758 \ucf54\ub4dc\ub294 \uc544\ub798\uc640 \uac19\uc2b5\ub2c8\ub2e4.<\/P><\/p>\n
\nCollections.sort(names, new Comparator() {\n    @Override\n    public int compare(String a, String b) {\n        return -b.compareTo(a);\n    }\n});\n<\/pre>\n
\uc704\uc758 Collections\uc758 sort \ud568\uc218\uc758 \ub450\ubc88\uc9f8 \uc778\uc790\uc5d0 1\ud68c\uc6a9 \ubaa9\uc801\uc73c\ub85c \uc775\uba85 \uac1d\uccb4\ub97c \uc0dd\uc131\ud574 \ub358\uc838\uc8fc\uace0 \uc788\uc2b5\ub2c8\ub2e4. \uc774 \uc775\uba85 \uac1d\uccb4\ub97c \uc0dd\uc131\ud558\uae30 \uc704\ud55c \uc778\ud130\ud398\uc774\uc2a4\uac00 \ub2e8 \ud558\ub098\uc758 \ub9e4\uc11c\ub4dc\uc5d0 \ub300\ud55c \uc815\uc758\ub97c \ud544\uc694\ub85c \ud569\ub2c8\ub2e4. \uc774\ub97c \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc73c\ub85c \ubc14\uafb8\uba74 \uc544\ub798\uc640 \uac19\uc2b5\ub2c8\ub2e4.<\/P><\/p>\n
\nCollections.sort(names, (String a, String b) -> {\n    return -b.compareTo(a);\n});\n<\/pre>\n
\ub78c\ub2e4\uc2dd\uc744 \ucef4\ud30c\uc77c\ub85c\uac00 \ud574\uc11d\ud560 \ub54c \uc5b4\ub5a4 \ud0c0\uc785\uc758 \uc5b4\ub5a4 \ub9e4\uc11c\ub4dc\ub97c \uc815\uc758\ud558\ub294\uc9c0\ub97c \uc790\ub3d9\uc73c\ub85c \ucd94\ub860\ud574 \uc90d\ub2c8\ub2e4. (\uc5fc\ubcd1\ud560, \ub098\ubcf4\ub2e4 \ub354 \ub611\ub611\ud574!) \uc704\uc758 \ub78c\ub2e4\uc2dd\uc744 \ubcf4\uba74 \ud568\uc218\uc758 \ucf54\ub4dc\uac00 \ud55c\uc904\uc774\ubbc0\ub85c \uc544\ub798\ucc98\ub7fc \ub354 \uc904\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/P><\/p>\n
\nCollections.sort(names, (String a, String b) ->  -b.compareTo(a));\n<\/pre>\n
\ucf54\ub4dc\uac00 \ud55c\uc904\uc774\ubbc0\ub85c {}\uc744 \uc81c\uac70\ud560 \uc218 \uc788\uace0, return \ud0a4\uc6cc\ub4dc\ub97c \uc81c\uac70\ud574\ub3c4 \ubc18\ud658\ud55c\ub2e4\ub77c\ub294 \uac1c\ub150\uc744 \uc774\ubbf8 \ucd94\ub860\uc744 \ud1b5\ud574 \ud30c\uc545\ud558\uace0 \uc788\uc2b5\ub2c8\ub2e4. (\uc774\uc81c \ub2c8\uac00 \ucf54\ub529\ud574\ub77c, \ub09c \ubb50\ud558\ub0d0?) \ucda9\ubd84\ud788 \uc904\uc600\ub2e4 \uc2f6\uc744 \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc744 \ub354 \uc904\uc77c \uc218 \uc788\ub294\ub370\uc694. \uc5b4\ucc28\ud53c \uc5b4\ub5a4 \ud568\uc218\ub97c \ub78c\ub2e4\uc2dd\uc73c\ub85c \uc815\uc758\ud558\ub294\uc9c0\ub97c \uc54c\uace0 \uc788\ub2e4\uba74 \ud574\ub2f9 \ud568\uc218\uc758 \ud0c0\uc785\uc744 \uba85\uc2dc\uc801\uc73c\ub85c \uc5b8\uae09\ud558\uc9c0 \uc54a\uc544\ub3c4 \ucd94\ub860\uc774 \uac00\ub2a5\ud560 \uac83\uc73c\ubbc0\ub85c \uc544\ub798\ucc98\ub7fc \ub354 \ucd5c\uc801\ud654\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/P><\/p>\n
\nCollections.sort(names, (a, b) -> -b.compareTo(a));\n<\/pre>\n
(\uc774\uc820 \ub098\ub3c4 \ubaa8\ub974\uaca0\uc744 \uc554\ud638 \ucf54\ub4dc.. \u315c_\u315c) \uc704\uc758 \ub0b4\uc6a9\uc740 \ub78c\ub2e4\uc2dd\uc758 \uc77c\ubd80\uc785\ub2c8\ub2e4. \ub78c\ub2e4\uc5d0 \uc880\ub354 \uae4a\uc774 \ub4e4\uc5b4\uac00\uba74.. \uae5c\uc9dd \ub180\ub77c\uac70\uc784.. -O-;<\/P><\/p>\n","protected":false},"excerpt":{"rendered":"
\ub9ce\uc740 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uc5d0\uc11c \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc740 \ud55c\ubc88 \uc0ac\uc6a9\ud558\uace0 \ubc84\ub9b4 \ud568\uc218\ub97c \uc815\uc758\ud558\uae30 \uc704\ud55c \uc6a9\ub3c4\ub85c \ub9ce\uc774 \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \ubb3c\ub860 \uc774 \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc5d0 \uc758\ud574 \ub9cc\ub4e4\uc5b4\uc9c4 \ud568\uc218\ub97c \ubcc0\uc218\uc5d0 \ub2f4\uc544 \ub450\ubc88 \uc774\uc0c1 \uc0ac\uc6a9\ud560 \uc218\ub3c4 \uc788\uc9c0\ub9cc… \uc5b4\ucc0c\ub418\uc5c8\ub4e0, \ub78c\ub2e4\ub294 \ube60\ub974\uac8c \ud568\uc218\ub97c \ub9cc\ub4e4\uc5b4 \uc0ac\uc6a9\ud558\uace0\ub294, \ubc84\ub9ac\ub294 \uc6a9\ub3c4\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4. Java 8\uc5d0\uc11c \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc744 \uc9c0\uc6d0\ud558\uace0 \uc788\ub294\ub370\uc694. \ubb38\uc790\uc5f4 \uc694\uc18c\ub97c \uac00\uc9c0\ub294 \ub9ac\uc2a4\ud2b8\ub97c \uc815\ub82c\ud558\ub294 \uc608\ub97c \ud1b5\ud574 \ub78c\ub2e4 \ud45c\ud604\uc2dd\uc744 \uc0b4\ud3b4 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4. \uc815\ub82c\ud560 … <\/p>\n
\ub354 \ubcf4\uae30 “[Java] Java8, \ub78c\ub2e4 \ud45c\ud604\uc2dd(Lambda expressions)”<\/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-2440","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\/2440","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=2440"}],"version-history":[{"count":0,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=\/wp\/v2\/posts\/2440\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2440"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2440"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.gisdeveloper.co.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2440"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}