{"id":1452,"date":"2019-08-14T15:23:39","date_gmt":"2019-08-14T06:23:39","guid":{"rendered":"https:\/\/www.charlezz.com\/?p=1452"},"modified":"2019-08-14T15:26:15","modified_gmt":"2019-08-14T06:26:15","slug":"%ea%b0%9d%ec%b2%b4-%ec%a7%80%ed%96%a5-%ed%94%84%eb%a1%9c%ea%b7%b8%eb%9e%98%eb%b0%8d%ea%b3%bc-solid-%ec%9b%90%ec%b9%99","status":"publish","type":"post","link":"https:\/\/charlezz.com\/?p=1452","title":{"rendered":"\uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uacfc SOLID \uc6d0\uce59"},"content":{"rendered":"<p><a href=\"https:\/\/www.charlezz.com\/?attachment_id=1453\" rel=\"attachment wp-att-1453\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/08\/SOLID.png\" alt=\"\" width=\"269\" height=\"121\" class=\"aligncenter size-full wp-image-1453\" \/><\/a><\/p>\n<p>SOLID\ub780 2000\ub144\ub300 \ucd08\ubc18 \ub85c\ubc84\ud2b8 \ub9c8\ud2f4\uc774 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \ubc0f \uc124\uacc4\uc5d0 \ub300\ud55c 5\uac00\uc9c0 \uc6d0\uce59\uc744 \uc18c\uac1c \ud55c \uac83\uc778\ub370, \uc720\uc9c0\ubcf4\uc218\uc640 \ud655\uc7a5\uc774 \uc26c\uc6b4 \uc18c\ud504\ud2b8\uc6e8\uc5b4\ub97c \ub9cc\ub4e4\uace0\uc790 \ud560 \ub54c \uc774 \uc6d0\uce59\uc744 \uc801\uc6a9\ud560 \uc218 \uc788\ub2e4. \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc744 \ub192\uc774\uace0 \ud655\uc7a5\uc774 \uc26c\uc6b4 \uad6c\uc870\ub97c \ub9cc\ub4e4\uae30 \uc704\ud55c \uc9c0\uce68\uc774\ub2e4.<\/p>\n<p>SOLID\uc6d0\uce59\uc740 5\uac00\uc9c0 \uc6d0\uce59\ub4e4\uc5d0\uc11c \uac01 \uc6d0\uce59\uc758 \ub450\ubb38\uc790\ub97c \ub530\uc640 \ub9cc\ub4e0 \uba85\uce6d\uc774\ub2e4. \uac01 \uc6d0\uce59\uc774 \ubb34\uc5c7\uc778\uc9c0 \uc0b4\ud3b4\ubcf4\uc790.<\/p>\n<h2>\ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59 (Single Responsibility Principle)<\/h2>\n<p>\uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0\uc11c \ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59(single responsibility principle)\uc774\ub780 \ubaa8\ub4e0 \ud074\ub798\uc2a4\ub294 \ud558\ub098\uc758 \ucc45\uc784\ub9cc \uac00\uc9c0\uba70, \ud074\ub798\uc2a4\ub294 \uadf8 \ucc45\uc784\uc744 \uc644\uc804\ud788 \ucea1\uc290\ud654\ud574\uc57c \ud568\uc744 \uc77c\uceeb\ub294\ub2e4. \ud074\ub798\uc2a4\uac00 \uc81c\uacf5\ud558\ub294 \ubaa8\ub4e0 \uae30\ub2a5\uc740 \uc774 \ucc45\uc784\uacfc \uc8fc\uc758 \uae4a\uac8c \ubd80\ud569\ud574\uc57c \ud55c\ub2e4.<\/p>\n<p>\ub85c\ubc84\ud2b8 \ub9c8\ud2f4\uc740 \uc5b4\ub5a4 \ud074\ub798\uc2a4\ub098 \ubaa8\ub4c8\uc740 \ubcc0\uacbd\ud558\ub824\ub294 \ub2e8 \ud558\ub098 \uc774\uc720\ub9cc\uc744 \uac00\uc838\uc57c \ud55c\ub2e4\uace0 \uacb0\ub860 \uc9c0\uc5c7\ub2e4. \uc608\ub97c \ub4e4\uc5b4\uc11c \ud2b9\uc815 \ub370\uc774\ud130\ub97c \ubd84\uc11d\ud558\uace0 \uc11c\ubc84\uc5d0 \uc804\uc1a1\ud558\ub294 \ubaa8\ub4c8\uc744 \uc0dd\uac01\ud574 \ubcf4\uc790. \uc774 \ubaa8\ub4c8\uc740 \ub450 \uac00\uc9c0 \uc774\uc720\ub85c \ubcc0\uacbd\ub420 \uc218 \uc788\ub2e4. \uccab \ubc88\uc9f8\ub85c \ub370\uc774\ud130\ub97c \ubd84\uc11d \ud558\ub294 \uc54c\uace0\ub9ac\uc998 \ub54c\ubb38\uc5d0 \ubcc0\uacbd\ub420 \uc218 \uc788\ub2e4. \ub450 \ubc88\uc9f8\ub85c \uc11c\ubc84\uc5d0 \uc804\uc1a1\ud558\ub294 \ud615\uc2dd \ub54c\ubb38\uc5d0 \ubcc0\uacbd\ub420 \uc218 \uc788\ub2e4. \ub2e8\uc77c \ucc45\uc784 \uc6d0\uce59\uc5d0 \uc758\ud558\uba74 \uc774 \ubb38\uc81c\uc758 \ub450 \uce21\uba74\uc774 \uc2e4\uc81c\ub85c \ubd84\ub9ac\ub41c \ub450 \ucc45\uc784 \ub54c\ubb38\uc774\uba70, \ub530\ub77c\uc11c \ubd84\ub9ac\ub41c \ud074\ub798\uc2a4\ub098 \ubaa8\ub4c8\ub85c \ub098\ub204\uc5b4\uc57c \ud55c\ub2e4. \ub2e4\ub978 \uc2dc\uae30\uc5d0 \ub2e4\ub978 \uc774\uc720\ub85c \ubcc0\uacbd\ub418\uc5b4\uc57c \ud558\ub294 \ub450 \uac00\uc9c0\ub97c \ubb36\ub294 \uac83\uc740 \ub098\uc05c \uc124\uacc4\uc77c \uc218 \uc788\ub2e4.<\/p>\n<p>\ud55c \ud074\ub798\uc2a4\ub97c \ud55c \uad00\uc2ec\uc0ac\uc5d0 \uc9d1\uc911\ud558\ub3c4\ub85d \uc720\uc9c0\ud558\ub294 \uac83\uc774 \uc911\uc694\ud55c \uc774\uc720\ub294, \uc774\uac83\uc774 \ud074\ub798\uc2a4\ub97c \ub354\uc6b1 \ud2bc\ud2bc\ud558\uac8c \ub9cc\ub4e4\uae30 \ub54c\ubb38\uc774\ub2e4. \uc55e\uc11c \ub4e0 \uc608\ub97c \uacc4\uc18d \uc0b4\ud3b4\ubcf4\uba74, \ud3b8\uc9d1 \uacfc\uc815\uc5d0 \ubcc0\uacbd\uc774 \uc77c\uc5b4\ub098\uba74, \uac19\uc740 \ud074\ub798\uc2a4\uc758 \uc77c\ubd80\ub85c \uc788\ub294 \ucd9c\ub825 \ucf54\ub4dc\uac00 \ub9dd\uac00\uc9c8 \uc704\ud5d8\uc774 \ub300\ub2e8\ud788 \ub192\ub2e4.<\/p>\n<h2>\uac1c\ubc29 \ud3d0\uc1c4 \uc6d0\uce59 (Open Closed Principle)<\/h2>\n<p>\n\uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59(OCP, Open-Closed Principle)\uc740 &#8216;\uc18c\ud504\ud2b8\uc6e8\uc5b4 \uac1c\uccb4(\ud074\ub798\uc2a4, \ubaa8\ub4c8, \ud568\uc218 \ub4f1\ub4f1)\ub294 \ud655\uc7a5\uc5d0 \ub300\ud574 \uc5f4\ub824 \uc788\uc5b4\uc57c \ud558\uace0, \uc218\uc815\uc5d0 \ub300\ud574\uc11c\ub294 \ub2eb\ud600 \uc788\uc5b4\uc57c \ud55c\ub2e4.&#8217;\ub294 \ud504\ub85c\uadf8\ub798\ubc0d \uc6d0\uce59\uc774\ub2e4.<\/p>\n<p>\ub0b4\uac00 \uc791\uc131\ud55c \ucf54\ub4dc \ub610\ub294 \ubaa8\ub4c8\uc911\uc5d0\uc11c \uc5b4\ub5a0\ud55c \ub0b4\uc6a9\uc744 \uc218\uc815\ud558\uae30 \uc704\ud574 \ub2e4\ub978 \ucf54\ub4dc\ub098 \ubaa8\ub4c8\uae4c\uc9c0 \uc218\uc815\ud574\uc57c \ud55c\ub2e4\uba74, \uc774\uc640 \uac19\uc740 \ucf54\ub4dc\ub294 \uc218\uc815\uc774 \uc5b4\ub835\ub2e4. \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59\uc740 \uc2dc\uc2a4\ud15c\uc758 \uad6c\uc870\ub97c \uc62c\ubc14\ub974\uac8c \uad6c\uc131\ud558\uc5ec \ub098\uc911\uc5d0 \uc774\uc640 \uac19\uc740 \uc720\ud615\uc758 \ubcc0\uacbd\uc774 \ub354 \uc774\uc0c1\uc758 \uc218\uc815\uc744 \uc720\ubc1c\ud558\uc9c0 \uc54a\ub3c4\ub85d \ud558\ub294 \uac83\uc774\ub2e4. \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59\uc774 \uc798 \uc801\uc6a9\ub418\uba74, \uae30\ub2a5\uc744 \ucd94\uac00\ud558\uac70\ub098 \ubcc0\uacbd\ud574\uc57c \ud560 \ub54c \uc774\ubbf8 \uc81c\ub300\ub85c \ub3d9\uc791\ud558\uace0 \uc788\ub358 \uc6d0\ub798 \ucf54\ub4dc\ub97c \ubcc0\uacbd\ud558\uc9c0 \uc54a\uc544\ub3c4, \uae30\uc874\uc758 \ucf54\ub4dc\uc5d0 \uc0c8\ub85c\uc6b4 \ucf54\ub4dc\ub97c \ucd94\uac00\ud568\uc73c\ub85c\uc368 \uae30\ub2a5\uc758 \ucd94\uac00\ub098 \ubcc0\uacbd\uc774 \uac00\ub2a5\ud558\ub2e4.<\/p>\n<p>\uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59\uc740 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \ud575\uc2ec \uc6d0\uce59\uc774\ub77c\uace0 \ud560 \uc218 \uc788\ub2e4. \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59\uc744 \ub530\ub974\uc9c0 \uc54a\ub294\ub2e4\uace0 \ud574\uc11c \uac1d\uccb4\uc9c0\ud5a5 \uc5b8\uc5b4\ub97c \uad6c\ud604\uc774 \ubd88\uac00\ub2a5\ud55c \uac83\uc740 \uc544\ub2c8\uc9c0\ub9cc \uc774 \uc6d0\uce59\uc744 \ubb34\uc2dc\ud558\uace0 \ud504\ub85c\uadf8\ub798\ubc0d\uc744 \ud55c\ub2e4\uba74, \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc758 \uac00\uc7a5 \ud070 \uc7a5\uc810\uc778 \uc720\uc5f0\uc131, \uc7ac\uc0ac\uc6a9\uc131, \uc720\uc9c0\ubcf4\uc218\uc131 \ub4f1\uc744 \uacb0\ucf54 \uc5bb\uc744 \uc218 \uc5c6\ub2e4. \ub530\ub77c\uc11c \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\uc5d0\uc11c \uac1c\ubc29-\ud3d0\uc1c4 \uc6d0\uce59\uc740 \ubc18\ub4dc\uc2dc \uc9c0\ucf1c\uc57c\ud560 \uae30\ubcf8\uc801\uc778 \uc6d0\uce59\uc774\ub2e4.<\/p>\n<h2>\ub9ac\uc2a4\ucf54\ud504 \uce58\ud658 \uc6d0\uce59 (Liskov Substitution Principle)<\/h2>\n<p>\uce58\ud658\uc131\uc740 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \uc6d0\uce59\uc774\ub2e4. \ud074\ub798\uc2a4 S\uac00 \ud074\ub798\uc2a4 T\uc758 \ubd80\ubaa8 \ud074\ub798\uc2a4\ub77c\uba74 \ubcc4\ub2e4\ub978 \ubcc0\uacbd\uc5c6\uc774 \ubd80\ubaa8 \ud074\ub798\uc2a4 T\ub97c \uc790\uc2dd\ud074\ub798\uc2a4 S\ub85c \uce58\ud658 \ud560 \uc218 \uc788\uc5b4\uc57c \ud55c\ub2e4\ub294 \uc6d0\uce59\uc774\ub2e4. \uc989 \uc5c5\uce90\uc2a4\ud305\ub41c \uc778\uc2a4\ud134\uc2a4\uac00 \ub17c\ub9ac\uc801\uc73c\ub85c \uadf8 \uc5ed\ud560\uc774 \ubb38\uc81c\uac00 \uc5c6\uc5b4\uc57c \ud558\ub294\uac83\uc774\ub2e4. \uc774\ub7ec\ud55c \uc6d0\uce59\uc744 \ub2e4\ub978 \uc6a9\uc5b4\ub85c \ud589\ub3d9\uc801 \ud558\uc704\ud615 \uc774\ub77c\uace0 \ud55c\ub2e4.<\/p>\n<p>\ub9ac\uc2a4\ucf54\ud504\uc758 \uc6d0\uce59\uc740 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \ud2b9\uc9d5\uc5d0 \uad00\ud55c \uba87\uac00\uc9c0 \ud45c\uc900\uc801\uc778 \uc694\uad6c\uc0ac\ud56d\uc744 \uac15\uc81c\ud55c\ub2e4.<\/p>\n<ul>\n<li>\ud558\uc704\ud074\ub798\uc2a4\uc5d0\uc11c \uba54\uc11c\ub4dc \ud30c\ub77c\ubbf8\ud130\uc758 \ubc18\uacf5\ubcc0\uc131<\/li>\n<li>\ud558\uc704\ud074\ub798\uc2a4\uc5d0\uc11c \ubc18\ud658\ud615\uc758 \uacf5\ubcc0\uc131<\/li>\n<li>\ud558\uc704\ud074\ub798\uc2a4\uc5d0\uc11c \uba54\uc11c\ub4dc\ub294 \uc0c1\uc704\ud074\ub798\uc2a4 \uba54\uc11c\ub4dc\uc5d0\uc11c \ub358\uc838\uc9c4 \uc608\uc678\uc0ac\ud56d\uc744 \uc81c\uc678\ud558\uace0 \uc0c8\ub85c\uc6b4 \uc608\uc678\uc0ac\ud56d\uc744 \ub358\uc9c0\uba74 \uc548\ub41c\ub2e4.<\/li>\n<li>\ud558\uc704\ud074\ub798\uc2a4\uc5d0\uc11c \uc120\ud589\uc870\uac74\uc740 \uac15\ud654\ub420 \uc218 \uc5c6\uc74c<\/li>\n<li>\ud558\uc704\ud074\ub798\uc2a4\uc5d0\uc11c \ud6c4\ud589 \uc870\uac74\uc740 \uc57d\ud654\ub420 \uc218 \uc5c6\uc74c<\/li>\n<li>\ud558\uc704\ud615\uc5d0\uc11c \uc0c1\uc704\ud615\uc758 \ubd88\ubcc0\uc870\uac74\uc740 \ubc18\ub4dc\uc2dc \uc720\uc9c0\ub418\uc5b4\uc57c \ud55c\ub2e4.<\/li>\n<\/ul>\n<table style=\"border-style: solid;\">\n<tbody>\n<tr>\n<td style=\"border-style: solid; border-color: #000000;\">\n<p><em><strong>Tip. \uacf5\ubcc0\uc131, \ubc18\uacf5\ubcc0\uc131, \ubd88\ubcc0\uc131 \uc774\ub780?<\/strong><\/em><br \/>\n\ub2e4\uc74c\uacfc \uac19\uc774 \ucc28\ub840\ub85c \uc0c1\uc18d\ubc1b\ub294 \ud0c0\uc785\uc774 \uc788\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4. A \u2190B \u2190 C<\/p>\n<p>\uacf5\ubcc0\uc131\uc758 \uc608\ub97c\ub4e4\uba74 List&lt;? extends B&gt; \ub780 B\ub97c \uc0c1\uc18d \ubc1b\ub294 \ud0c0\uc785\uc73c\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ub9ac\uc2a4\ud2b8\uac00 \uc788\ub2e4\uba74 List&lt;C&gt;\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4\ub294 \ub0b4\uc6a9\uc774\ub2e4.<\/p>\n<p>\ubc18\uacf5\ubcc0\uc131\uc758 \uc608\ub97c\ub4e4\uba74 List&lt;? extends B&gt; \ub780 \ub9ac\uc2a4\ud2b8\uac00 \uc788\uc744 \ub54c List&lt;A&gt;\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4\ub294 \uac83\uc774\ub2e4. \ubb3c\ub860 A\uc758 \ubd80\ubaa8 \ud0c0\uc785\uc73c\ub85c\ub3c4 \uce58\ud658\uc774 \uac00\ub2a5\ud558\ub2e4.<\/p>\n<p>\ubd88\ubcc0\uc131\uc740 \uc704\uc758 \uacf5\ubcc0\uc131\uacfc \ubc18\uacf5\ubcc0\uc131\uc744 \ud5c8\uc6a9\ud558\uc9c0 \uc54a\ub294 \uacbd\uc6b0\uc774\ub2e4.<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59 (Interface Segregation Principle)<\/h2>\n<p>\uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59\uc740 \uc5b4\ub5a0\ud55c \ud074\ub798\uc2a4\uac00 \uc790\uc2e0\uc774 \uc774\uc6a9\ud558\uc9c0 \uc54a\ub294 \uba54\uc11c\ub4dc\uc5d0 \uc758\uc874\ud558\uc9c0 \uc54a\uc544\uc57c \ud55c\ub2e4\ub294 \uc6d0\uce59\uc774\ub2e4. \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59\uc740 \ud070 \ub369\uc5b4\ub9ac\uc758 \uc778\ud130\ud398\uc774\uc2a4\ub4e4\uc744 \uad6c\uccb4\uc801\uc774\uace0 \uc791\uc740 \ub2e8\uc704\ub4e4\ub85c \ubd84\ub9ac\uc2dc\ud0b4\uc73c\ub85c\uc368 \ud074\ub798\uc2a4\ub4e4\uc774 \uaf2d \ud544\uc694\ud55c \uba54\uc11c\ub4dc\ub4e4\ub9cc \uc774\uc6a9\ud560 \uc218 \uc788\uac8c \ud55c\ub2e4. \uc774\uc640 \uac19\uc740 \uc791\uc740 \ub2e8\uc704\ub4e4\uc744 \uc5ed\ud560 \uc778\ud130\ud398\uc774\uc2a4\ub77c\uace0\ub3c4 \ubd80\ub978\ub2e4. \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59\uc744 \ud1b5\ud574 \uc2dc\uc2a4\ud15c\uc758 \ub0b4\ubd80 \uc758\uc874\uc131\uc744 \uc57d\ud654\uc2dc\ucf1c \ub9ac\ud329\ud1a0\ub9c1, \uc218\uc815, \uc7ac\ubc30\ud3ec\ub97c \uc27d\uac8c \ud560 \uc218 \uc788\ub2e4.<\/p>\n<p>\uc608\ub97c\ub4e4\uc5b4 \ub3c5\uc218\ub9ac \uac1d\uccb4\ub97c \ub9cc\ub4e4\uc5b4\ubcf4\uc790<\/p>\n<pre class=\"lang:java decode:true\">public abstract class Bird {\r\n    abstract void fly();\r\n    abstract void cry();\r\n}\r\n\r\npublic class Eagle extends Bird {\r\n    @Override\r\n    public void fly() {...}\r\n\r\n    @Override\r\n    public void cry() {...}\r\n}<\/pre>\n<p>&nbsp;<\/p>\n<p>Bird\ub77c\ub294 \ucd94\uc0c1\ud074\ub798\uc2a4\ub97c \ub9cc\ub4e4\uc5b4\uc11c \uc0c8\uc758 \uc6b8\uc74c\uc18c\ub9ac\ub97c \ub0b4\uace0 \ub0a0 \uc218 \uc788\ub294 \uae30\ub2a5\uc744 \uac00\uc9c4 \uba54\uc18c\ub4dc\ub97c \ub9cc\ub4e0 \ub4a4 Bird\ub97c \uc0c1\uc18d\ubc1b\uc740 Eagle\uc744 \ub9cc\ub4e4\uc5c8\ub2e4. \uc774\ub54c Penguin \ud074\ub798\uc2a4\ub97c \ub9cc\ub4e0\ub2e4\uba74 \ud3ad\uadc4\uc740 \uc0c8\uc9c0\ub9cc \ub0a0\uc9c0\ub294 \ubabb\ud558\ubbc0\ub85c fly() \uba54\uc18c\ub4dc\ub97c \uac00\uc9c0\uba74 ISP \uc778\ud130\ud398\uc774\uc2a4 \ubd84\ub9ac \uc6d0\uce59\uc5d0 \uc5b4\uae0b\ub0a0 \uc218 \uc788\ub2e4. \ub2e4\uc74c\uacfc \uac19\uc774 \ucf54\ub4dc\ub97c \uc218\uc815\ud560 \uc218 \uc788\ub2e4.<\/p>\n<pre class=\"lang:java decode:true\">public abstract class Bird {\r\n    abstract void cry();\r\n}\r\n\r\npublic interface Flyable {\r\n    void fly();\r\n}\r\n\r\npublic abstract class FlyableBird extends Bird implements Flyable {...}\r\n\r\npublic class Eagle extends FlyableBird {\r\n    @Override\r\n    public void fly() {...}\r\n\r\n    @Override\r\n    public void cry() {...}\r\n}\r\n\r\npublic class Penguin extends Bird {\r\n    @Override\r\n    void cry() {...}\r\n}<\/pre>\n<p>fly() \uba54\uc18c\ub4dc\ub97c \uc778\ud130\ud398\uc774\uc2a4\ub85c \ubd84\ub9ac\ud558\uace0 \ub0a0 \uc218 \uc788\ub294 \uc0c8\uc5d0\uac8c\ub9cc \uad6c\ud604\ud568\uc73c\ub85c\uc368 \ud3ad\uadc4\uc740 \uc0ac\uc6a9\ud558\uc9c0 \uc54a\ub294 fly() \uba54\uc18c\ub4dc\ub97c \uac00\uc9c0\uc9c0 \uc54a\uc744 \uc218 \uc788\uac8c\ub418\uc5b4 ISP\uc6d0\uce59\uc744 \uc9c0\ud0ac \uc218 \uc788\uac8c \ub418\uc5c8\ub2e4. \ud3ad\uadc4\uc5d0\uac8c swim() \uba54\uc18c\ub4dc\ub97c \ucd94\uac00 \ud558\uace0 \uc2f6\ub2e4\uba74 Swimmable \uc778\ud130\ud398\uc774\uc2a4\ub97c \ub9cc\ub4e4\uc5b4 \ubcfc \uc218\ub3c4 \uc788\ub2e4.<\/p>\n<h2>\uc758\uc874 \uc5ed\uc804 \uc6d0\uce59 (Dependency Inversion Principle)<\/h2>\n<p>\uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0\uc11c \uc758\uc874 \uc5ed\uc804 \uc6d0\uce59\uc740 \ubaa8\ub4c8\ub4e4\uc744 \ubd84\ub9ac\ud558\ub294 \ud2b9\uc815 \ud615\uc2dd\uc744 \uc9c0\uce6d\ud55c\ub2e4. \uc774 \uc6d0\uce59\uc744 \ub530\ub974\uba74, \uc0c1\uc704 \uacc4\uce35\uc774 \ud558\uc704 \uacc4\uce35\uc5d0 \uc758\uc874\ud558\ub294 \uc804\ud1b5\uc801\uc778 \uc758\uc874 \uad00\uacc4\ub97c \uc5ed\uc804\uc2dc\ud0b4\uc73c\ub85c\uc368 \uc0c1\uc704 \uacc4\uce35\uc774 \ud558\uc704 \uacc4\uce35\uc758 \uad6c\ud604\uc73c\ub85c\ubd80\ud130 \ub3c5\ub9bd\ub418\uac8c \ud560 \uc218 \uc788\ub2e4. \uc774 \uc6d0\uce59\uc740 \ub2e4\uc74c\uacfc \uac19\uc740 \ub0b4\uc6a9\uc744 \ub2f4\uace0 \uc788\ub2e4.<\/p>\n<ul>\n<li>\uccab\uc9f8, \uc0c1\uc704 \ubaa8\ub4c8\uc740 \ud558\uc704 \ubaa8\ub4c8\uc5d0 \uc758\uc874\ud574\uc11c\ub294 \uc548\ub41c\ub2e4. \uc0c1\uc704 \ubaa8\ub4c8\uacfc \ud558\uc704 \ubaa8\ub4c8 \ubaa8\ub450 \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud55c\ub2e4.<\/li>\n<li>\ub458\uc9f8, \ucd94\uc0c1\ud654\ub294 \uc138\ubd80 \uc0ac\ud56d\uc5d0 \uc758\uc874\ud574\uc11c\ub294 \uc548\ub41c\ub2e4. \uc138\ubd80\uc0ac\ud56d\uc774 \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud55c\ub2e4.<br \/>\n\uc774 \uc6d0\uce59\uc740 &#8216;\uc0c1\uc704\uc640 \ud558\uc704 \uac1d\uccb4 \ubaa8\ub450\uac00 \ub3d9\uc77c\ud55c \ucd94\uc0c1\ud654\uc5d0 \uc758\uc874\ud574\uc57c \ud55c\ub2e4&#8217;\ub294 \uac1d\uccb4 \uc9c0\ud5a5\uc801 \uc124\uacc4\uc758 \ub300\uc6d0\uce59\uc744 \uc81c\uacf5\ud55c\ub2e4.<\/li>\n<\/ul>\n<p><a href=\"https:\/\/www.charlezz.com\/?attachment_id=1262\" rel=\"attachment wp-att-1262\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/www.charlezz.com\/wordpress\/wp-content\/uploads\/2019\/05\/drawit-diagram-2.png\" alt=\"\" width=\"586\" height=\"551\" class=\"aligncenter size-full wp-image-1262\" srcset=\"https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/05\/drawit-diagram-2.png 586w, https:\/\/charlezz.com\/wordpress\/wp-content\/uploads\/2019\/05\/drawit-diagram-2-300x282.png 300w\" sizes=\"(max-width: 586px) 100vw, 586px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>SOLID\ub780 2000\ub144\ub300 \ucd08\ubc18 \ub85c\ubc84\ud2b8 \ub9c8\ud2f4\uc774 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d \ubc0f \uc124\uacc4\uc5d0 \ub300\ud55c 5\uac00\uc9c0 \uc6d0\uce59\uc744 \uc18c\uac1c \ud55c \uac83\uc778\ub370, \uc720\uc9c0\ubcf4\uc218\uc640 \ud655\uc7a5\uc774 \uc26c\uc6b4 \uc18c\ud504\ud2b8\uc6e8\uc5b4\ub97c \ub9cc\ub4e4\uace0\uc790 \ud560 \ub54c \uc774 \uc6d0\uce59\uc744 \uc801\uc6a9\ud560 \uc218 \uc788\ub2e4. \ucf54\ub4dc\uc758 \uac00\ub3c5\uc131\uc744 \ub192\uc774\uace0 \ud655\uc7a5\uc774 \uc26c\uc6b4 \uad6c\uc870\ub97c \ub9cc\ub4e4\uae30 \uc704\ud55c \uc9c0\uce68\uc774\ub2e4. SOLID\uc6d0\uce59\uc740 5\uac00\uc9c0 \uc6d0\uce59\ub4e4\uc5d0\uc11c \uac01 \uc6d0\uce59\uc758 \ub450\ubb38\uc790\ub97c \ub530\uc640 \ub9cc\ub4e0 \uba85\uce6d\uc774\ub2e4. \uac01 \uc6d0\uce59\uc774 \ubb34\uc5c7\uc778\uc9c0 \uc0b4\ud3b4\ubcf4\uc790. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[28,25],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1452"}],"collection":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1452"}],"version-history":[{"count":5,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1452\/revisions"}],"predecessor-version":[{"id":1458,"href":"https:\/\/charlezz.com\/index.php?rest_route=\/wp\/v2\/posts\/1452\/revisions\/1458"}],"wp:attachment":[{"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1452"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1452"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/charlezz.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1452"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}