{"id":8185,"date":"2022-01-26T01:28:58","date_gmt":"2022-01-26T01:28:58","guid":{"rendered":"https:\/\/www.cybermedian.com\/ja\/?p=8185"},"modified":"2026-04-20T09:13:21","modified_gmt":"2026-04-20T09:13:21","slug":"%e3%82%aa%e3%83%bc%e3%83%97%e3%83%b3%e3%82%af%e3%83%ad%e3%83%bc%e3%82%ba%e5%8e%9f%e5%89%87%ef%bc%88ocp%ef%bc%89%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.cybermedian.com\/ja\/what-is-the-open-closed-principle-ocp\/","title":{"rendered":"\u30aa\u30fc\u30d7\u30f3\u30af\u30ed\u30fc\u30ba\u539f\u5247\uff08OCP\uff09\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f"},"content":{"rendered":"<section class=\"section section--body section--first\">\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<p id=\"05f0\" class=\"graf graf--p graf-after--h3\"><a class=\"markup--anchor markup--p-anchor\" 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href=\"https:\/\/www.techopedia.com\/definition\/21105\/object-oriented-design-ood#:~:text=Object%2Doriented%20design%20%28OOD%29%20is%20the%20process%20of%20using,%28OOP%29%20process%20or%20lifecycle.\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/www.techopedia.com\/definition\/21105\/object-oriented-design-ood#:~:text=Object%2Doriented%20design%20(OOD)%20is%20the%20process%20of%20using,(OOP)%20process%20or%20lifecycle.\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u8a2d\u8a08<\/a>\u3067\u306f\u00a0\u3001\u30af\u30e9\u30b9\u306b\u30d3\u30b8\u30cd\u30b9\u30ed\u30b8\u30c3\u30af\u3092\u500b\u5225\u306b\u5b9f\u88c5\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u3001\u3059\u3079\u3066\u306e\u30ed\u30b8\u30c3\u30af\u3092\u30a2\u30c8\u30df\u30c3\u30af\u30ed\u30b8\u30c3\u30af\u304b\u3089\u7d50\u5408\u3057\u307e\u3059\u3002\u3053\u306e\u65b9\u6cd5\u3067\u306e\u307f\u3001\u30b3\u30fc\u30c9\u3092\u518d\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u7c92\u5ea6\u304c\u5c0f\u3055\u3044\u307b\u3069\u3001\u518d\u5229\u7528\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul class=\"postList\">\n<li id=\"4999\" class=\"graf graf--li 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class=\"graf graf--p graf-after--p\"><strong class=\"markup--strong markup--p-strong\">\u7b2c\u4e09<\/strong>\u306b\u3001\u62bd\u8c61\u5316\u30ec\u30a4\u30e4\u30fc\u306f\u53ef\u80fd\u306a\u9650\u308a\u5b89\u5b9a\u3057\u305f\u72b6\u614b\u306b\u4fdd\u3064\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u78ba\u8a8d\u3055\u308c\u308b\u3068\u3001\u5909\u66f4\u306f\u8a31\u53ef\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n<p id=\"22c7\" class=\"graf graf--p graf-after--p\">\u5909\u66f4\u306e\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u306f2\u3064\u306e\u610f\u5473\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p id=\"cda0\" class=\"graf graf--p graf-after--p\">\u307e\u305a\u3001\u540c\u3058\u5909\u66f4\u3092\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u307e\u305f\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u307e\u3059\u3002<\/p>\n<p id=\"8a51\" class=\"graf graf--p graf-after--p graf--trailing\">\u6b21\u306b\u3001\u3055\u307e\u3056\u307e\u306a\u5909\u66f4\u3092\u3055\u307e\u3056\u307e\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u307e\u305f\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u306b\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u307e\u3059\u30022\u3064\u306e\u7570\u306a\u308b\u5909\u66f4\u304c\u540c\u3058\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u307e\u305f\u306f\u62bd\u8c61\u30af\u30e9\u30b9\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u3088\u3046\u306b\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"section section--body section--last\">\n<div class=\"section-divider\">\n<hr class=\"section-divider\" \/>\n<\/div>\n<div class=\"section-content\">\n<div class=\"section-inner sectionLayout--insetColumn\">\n<h4 id=\"69e6\" class=\"graf graf--h4 graf--leading\"><span id=\"Examples\">\u4f8b<\/span><\/h4>\n<p id=\"56bf\" class=\"graf graf--p graf-after--h4\">\u4f8b\u3001\u624b\u3067\u30c9\u30a2\u3092\u958b\u9589\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"d3f2\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/0wlXaJtn3Bexx9ev7.png\" data-image-id=\"0*wlXaJtn3Bexx9ev7.png\" data-width=\"453\" data-height=\"148\" \/><\/figure>\n<p id=\"c2c2\" class=\"graf graf--p graf-after--figure\">\u65b0\u305f\u306a\u8981\u671b\u304c\u3042\u308c\u3070\u3001\u5f15\u304d\u51fa\u3057\u3092\u624b\u3067\u958b\u9589\u3059\u308b\u6a5f\u80fd\u3092\u9ad8\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001Drawer\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3059\u308b\u3068\u540c\u6642\u306b\u3001Hand\u30af\u30e9\u30b9\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<figure id=\"1d14\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/1QXaFJLucsecnatWUuuuH6Q.png\" data-image-id=\"1*QXaFJLucsecnatWUuuuH6Q.png\" data-width=\"781\" data-height=\"500\" data-is-featured=\"true\" \/><\/figure>\n<p id=\"ce83\" class=\"graf graf--p graf-after--figure\">OCP\u306e\u958b\u9589\u539f\u7406\u306e\u4f8b\u306b\u5f93\u3063\u3066\u3001\u30c9\u30a2\u3092\u624b\u52d5\u3067\u958b\u9589\u3059\u308b\u3053\u3068\u306f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u4f9d\u5b58\u3057\u3001\u7279\u5b9a\u306e\u5b9f\u88c5\u30af\u30e9\u30b9\u304c\u3053\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"28a1\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/1NVWYY0ZYvgMJbnENhw1QKw.png\" data-image-id=\"1*NVWYY0ZYvgMJbnENhw1QKw.png\" data-width=\"800\" data-height=\"461\" \/><\/figure>\n<p id=\"2372\" class=\"graf graf--p graf-after--figure\">\u51b7\u8535\u5eab\u3092\u958b\u9589\u3059\u308b\u30cf\u30f3\u30c9\u306e\u6570\u3092\u5897\u3084\u3059\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u3001\u51b7\u8535\u5eab\u30af\u30e9\u30b9\u306f\u3001\u5143\u306eHand\u30af\u30e9\u30b9\u3068\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5909\u66f4\u305b\u305a\u306b\u3053\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/p>\n<figure id=\"6688\" class=\"graf graf--figure graf-after--p\"><img decoding=\"async\" class=\"graf-image\" src=\"https:\/\/www.cybermedian.com\/ja\/wp-content\/uploads\/sites\/7\/2022\/01\/1iR6WQOaVLjFUMy1056vL-w.png\" data-image-id=\"1*iR6WQOaVLjFUMy1056vL-w.png\" data-width=\"946\" data-height=\"464\" \/><\/figure>\n<h4 id=\"246b\" class=\"graf graf--h4 graf-after--figure\"><span id=\"More_Object_Oriented_Resources\">\u3088\u308a\u591a\u304f\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30ea\u30bd\u30fc\u30b9<\/span><\/h4>\n<ul class=\"postList\">\n<li id=\"3002\" class=\"graf graf--li graf-after--h4\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/reflectoring.io\/open-closed-principle-explained\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/reflectoring.io\/open-closed-principle-explained\/\">\u958b\u653e\u9589\u9396\u539f\u5247\u306e\u8aac\u660e<\/a><\/li>\n<li id=\"be77\" class=\"graf graf--li graf-after--li\"><a class=\"markup--anchor markup--li-anchor\" href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/uml-class-diagram-tutorial\/\" target=\"_blank\" rel=\"noopener\" data-href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/uml-class-diagram-tutorial\/\">UML\u30af\u30e9\u30b9\u56f3\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb<\/a><\/li>\n<li id=\"d80e\" 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