{"id":722,"date":"2026-03-27T17:26:24","date_gmt":"2026-03-27T17:26:24","guid":{"rendered":"https:\/\/www.visualize-ai.com\/ja\/designing-banking-system-oop-principles\/"},"modified":"2026-03-27T17:26:24","modified_gmt":"2026-03-27T17:26:24","slug":"designing-banking-system-oop-principles","status":"publish","type":"post","link":"https:\/\/www.visualize-ai.com\/ja\/designing-banking-system-oop-principles\/","title":{"rendered":"\u4e8b\u4f8b\u7814\u7a76\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u539f\u5247\u3092\u7528\u3044\u305f\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u8a08"},"content":{"rendered":"<p>\u5805\u7262\u306a\u91d1\u878d\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u306b\u306f\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30ad\u30eb\u4ee5\u4e0a\u306e\u3082\u306e\u304c\u5fc5\u8981\u3067\u3059\u3002\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u3001\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\u3092\u4fdd\u8a3c\u3059\u308b\u69cb\u9020\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u5206\u6790\u3068\u8a2d\u8a08\uff08OOAD\uff09\u306f\u3001\u9280\u884c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u3088\u3046\u306a\u8907\u96d1\u306a\u30b7\u30b9\u30c6\u30e0\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u7684\u57fa\u76e4\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u30ab\u30d7\u30bb\u30eb\u5316\u3001\u7d99\u627f\u3001\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u3001\u62bd\u8c61\u5316\u3068\u3044\u3063\u305f\u57fa\u672c\u539f\u5247\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u5316\u3055\u308c\u3001\u4fdd\u5b88\u6027\u304c\u9ad8\u304f\u3001\u30bb\u30ad\u30e5\u30a2\u306a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u69cb\u7bc9\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u30ac\u30a4\u30c9\u3067\u306f\u3001OOP\u306e\u539f\u5247\u3092\u5b9f\u8df5\u7684\u306b\u6d3b\u7528\u3057\u3066\u5305\u62ec\u7684\u306a\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u63a2\u6c42\u3057\u307e\u3059\u3002<\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img alt=\"Cartoon-style infographic illustrating object-oriented design principles for banking systems, featuring core classes (Customer, Account, Transaction, Bank), the four OOP pillars (encapsulation with lock icon, inheritance tree, polymorphism shape-shifter, abstraction puzzle interface), design patterns (Singleton key, Factory assembly line, Strategy gears), and ACID security properties, with colorful icons, relationship arrows, and key developer takeaways for building secure, scalable financial software\" decoding=\"async\" src=\"https:\/\/www.visualize-ai.com\/wp-content\/uploads\/2026\/03\/oop-banking-system-design-infographic-cartoon.jpg\"\/><\/figure>\n<\/div>\n<h2>1. \u8981\u4ef6\u306e\u7406\u89e3 \ud83d\udccb<\/h2>\n<p>1\u884c\u306e\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u524d\u306b\u3001\u5206\u6790\u6bb5\u968e\u3067\u30b7\u30b9\u30c6\u30e0\u304c\u4f55\u3092\u5b9f\u884c\u3059\u3079\u304d\u304b\u3092\u7279\u5b9a\u3057\u307e\u3059\u3002\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u306f\u6a5f\u5bc6\u30c7\u30fc\u30bf\u3068\u91d1\u878d\u53d6\u5f15\u3092\u6271\u3046\u305f\u3081\u3001\u6b63\u78ba\u3055\u304c\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002\u6a5f\u80fd\u8981\u4ef6\u306f\u30e6\u30fc\u30b6\u30fc\u304c\u5b9f\u884c\u3067\u304d\u308b\u64cd\u4f5c\u3092\u5b9a\u7fa9\u3057\u3001\u975e\u6a5f\u80fd\u8981\u4ef6\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u306e\u57fa\u6e96\u3092\u898f\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u6a5f\u80fd\u8981\u4ef6\uff1a<\/strong>\n<ul>\n<li>\u53e3\u5ea7\u306e\u4f5c\u6210\u3068\u7ba1\u7406\uff08\u958b\u8a2d\u3001\u9589\u9396\u3001\u51cd\u7d50\uff09\u3002<\/li>\n<li>\u91d1\u878d\u53d6\u5f15\uff08\u9810\u91d1\u3001\u5f15\u304d\u51fa\u3057\u3001\u632f\u8fbc\uff09\u3002<\/li>\n<li>\u5229\u606f\u306e\u8a08\u7b97\u3068\u4ed8\u4e0e\u3002<\/li>\n<li>\u30ed\u30fc\u30f3\u306e\u7533\u8acb\u3068\u8fd4\u6e08\u51e6\u7406\u3002<\/li>\n<li>\u660e\u7d30\u66f8\u304a\u3088\u3073\u53d6\u5f15\u5c65\u6b74\u306e\u751f\u6210\u3002<\/li>\n<\/ul>\n<\/li>\n<li><strong>\u975e\u6a5f\u80fd\u8981\u4ef6\uff1a<\/strong>\n<ul>\n<li>\u9ad8\u3044\u53ef\u7528\u6027\uff0899.9%\u306e\u7a3c\u50cd\u7387\uff09\u3002<\/li>\n<li>\u30c7\u30fc\u30bf\u306e\u4e00\u8cab\u6027\u304a\u3088\u3073ACID\u6e96\u62e0\u3002<\/li>\n<li>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30d7\u30ed\u30c8\u30b3\u30eb\uff08\u6697\u53f7\u5316\u3001\u8a8d\u8a3c\uff09\u3002<\/li>\n<li>\u8ca0\u8377\u4e0b\u3067\u306e\u5fdc\u7b54\u6642\u9593\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>2. \u30b3\u30a2\u30af\u30e9\u30b9\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u7279\u5b9a \ud83e\uddf1<\/h2>\n<p>\u8a2d\u8a08\u306e\u7b2c\u4e00\u6b69\u306f\u8981\u4ef6\u306b\u542b\u307e\u308c\u308b\u540d\u8a5e\u3092\u7279\u5b9a\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u3089\u306e\u540d\u8a5e\u304c\u30af\u30e9\u30b9\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002\u9280\u884c\u306e\u6587\u8108\u3067\u306f\u3001\u4e3b\u306a\u30a8\u30f3\u30c6\u30a3\u30c6\u30a3\u306b\u306f\u9867\u5ba2\u3001\u53e3\u5ea7\u3001\u53d6\u5f15\u3001\u304a\u3088\u3073\u9280\u884c\u81ea\u4f53\u304c\u542b\u307e\u308c\u307e\u3059\u3002\u5404\u30af\u30e9\u30b9\u306f\u3001\u660e\u78ba\u306b\u5b9a\u7fa9\u3055\u308c\u305f\u5c5e\u6027\u3068\u632f\u308b\u821e\u3044\u3092\u6301\u3064\u7279\u5b9a\u306e\u6982\u5ff5\u3092\u8868\u3057\u307e\u3059\u3002<\/p>\n<h3>2.1 \u9867\u5ba2\u30af\u30e9\u30b9<\/h3>\n<p>\u3053\u306e\u30af\u30e9\u30b9\u306f\u53e3\u5ea7\u3092\u6240\u6709\u3059\u308b\u500b\u4eba\u307e\u305f\u306f\u6cd5\u4eba\u3092\u8868\u3057\u307e\u3059\u3002\u500b\u4eba\u306e\u8b58\u5225\u60c5\u5831\u304a\u3088\u3073\u9023\u7d61\u5148\u60c5\u5831\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u9867\u5ba2ID\u3001\u6c0f\u540d\u3001\u4f4f\u6240\u3001\u9023\u7d61\u5148\u756a\u53f7\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001KYC\u30b9\u30c6\u30fc\u30bf\u30b9\u3002<\/li>\n<li><strong>\u632f\u308b\u821e\u3044\uff1a<\/strong>\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u66f4\u65b0\u3001\u660e\u7d30\u66f8\u306e\u8acb\u6c42\u3001\u8a8d\u8a3c\u3002<\/li>\n<\/ul>\n<h3>2.2 \u53e3\u5ea7\u30af\u30e9\u30b9<\/h3>\n<p>\u53e3\u5ea7\u306f\u8cc7\u91d1\u3092\u4fdd\u6301\u3057\u307e\u3059\u3002\u9867\u5ba2\u3068\u95a2\u9023\u4ed8\u3051\u3089\u308c\u3001\u91d1\u878d\u5546\u54c1\u306e\u7a2e\u985e\uff08\u8caf\u84c4\u3001\u5f53\u5ea7\u3001\u5b9a\u671f\u9810\u91d1\uff09\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u53e3\u5ea7\u756a\u53f7\u3001\u53e3\u5ea7\u7a2e\u5225\u3001\u6b8b\u9ad8\u3001\u91d1\u5229\u3001\u72b6\u614b\u3002<\/li>\n<li><strong>\u632f\u308b\u821e\u3044\uff1a<\/strong>\u9810\u91d1\u3001\u5f15\u304d\u51fa\u3057\u3001\u5229\u606f\u8a08\u7b97\u3001\u51cd\u7d50\u3002<\/li>\n<\/ul>\n<h3>2.3 \u53d6\u5f15\u30af\u30e9\u30b9<\/h3>\n<p>\u3053\u306e\u30af\u30e9\u30b9\u306f\u8cc7\u91d1\u306e\u3059\u3079\u3066\u306e\u79fb\u52d5\u3092\u8a18\u9332\u3057\u307e\u3059\u3002\u76e3\u67fb\u8a3c\u8de1\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3059\u308b\u305f\u3081\u306b\u3001\u30ed\u30b0\u30a8\u30f3\u30c8\u30ea\u3068\u3057\u3066\u6a5f\u80fd\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u5c5e\u6027\uff1a<\/strong> \u53d6\u5f15ID\u3001\u30bf\u30a4\u30d7\uff08\u501f\u65b9\uff0f\u8cb8\u65b9\uff09\u3001\u91d1\u984d\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u3001\u9001\u91d1\u5143\u53e3\u5ea7\u3001\u9001\u91d1\u5148\u53e3\u5ea7\u3002<\/li>\n<li><strong>\u632f\u308b\u821e\u3044\uff1a<\/strong> \u691c\u8a3c\u3001\u30b3\u30df\u30c3\u30c8\u3001\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3002<\/li>\n<\/ul>\n<h3>2.4 \u30af\u30e9\u30b9\u5c5e\u6027\u6bd4\u8f03\u8868 \ud83d\udcca<\/h3>\n<table>\n<thead>\n<tr>\n<th>\u30af\u30e9\u30b9\u540d<\/th>\n<th>\u4e3b\u8981\u306a\u5c5e\u6027<\/th>\n<th>\u4e3b\u306a\u30e1\u30bd\u30c3\u30c9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u9867\u5ba2<\/td>\n<td>id\u3001\u540d\u524d\u3001\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\u3001kycStatus<\/td>\n<td>\u8a8d\u8a3c\u3001\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u66f4\u65b0<\/td>\n<\/tr>\n<tr>\n<td>\u53e3\u5ea7<\/td>\n<td>\u53e3\u5ea7\u756a\u53f7\u3001\u6b8b\u9ad8\u3001\u30bf\u30a4\u30d7\u3001\u91d1\u5229<\/td>\n<td>\u9810\u91d1\u3001\u5f15\u304d\u51fa\u3057\u3001\u91d1\u5229\u8a08\u7b97<\/td>\n<\/tr>\n<tr>\n<td>\u53d6\u5f15<\/td>\n<td>\u53d6\u5f15ID\u3001\u91d1\u984d\u3001\u65e5\u4ed8\u3001\u30bf\u30a4\u30d7<\/td>\n<td>\u691c\u8a3c\u3001\u30b3\u30df\u30c3\u30c8<\/td>\n<\/tr>\n<tr>\n<td>\u9280\u884c<\/td>\n<td>\u9280\u884c\u540d\u3001\u652f\u5e97\u6240\u5728\u5730\u3001\u7dcf\u53e3\u5ea7\u6570<\/td>\n<td>\u53e3\u5ea7\u4f5c\u6210\u3001\u8cc7\u91d1\u632f\u66ff<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>3. \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u539f\u5247\u306e\u9069\u7528 \ud83d\udc8e<\/h2>\n<p>\u3053\u306e\u8a2d\u8a08\u306e\u5f37\u307f\u306f\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306e4\u3064\u306e\u67f1\u306b\u3069\u306e\u3088\u3046\u306b\u5f93\u3063\u3066\u3044\u308b\u304b\u306b\u3042\u308a\u307e\u3059\u3002\u5404\u539f\u5247\u306f\u3001\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u306b\u5185\u5728\u3059\u308b\u7279\u5b9a\u306e\u8ab2\u984c\u306b\u5bfe\u51e6\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>3.1 \u30ab\u30d7\u30bb\u30eb\u5316 \ud83d\udd12<\/h3>\n<p>\u30ab\u30d7\u30bb\u30eb\u5316\u306f\u30c7\u30fc\u30bf\u3068\u30e1\u30bd\u30c3\u30c9\u3092\u4e00\u7dd2\u306b\u675f\u306d\u306a\u304c\u3089\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e00\u90e8\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3078\u306e\u76f4\u63a5\u30a2\u30af\u30bb\u30b9\u3092\u5236\u9650\u3057\u307e\u3059\u3002\u9280\u884c\u696d\u52d9\u3067\u306f\u3001\u6b8b\u9ad8\u306e\u8a73\u7d30\u3092\u516c\u958b\u3059\u308b\u3053\u3068\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u3067\u3059\u3002\u30ab\u30d7\u30bb\u30eb\u5316\u306b\u3088\u308a\u3001\u6b8b\u9ad8\u3092\u5909\u66f4\u3067\u304d\u308b\u306e\u306f\u627f\u8a8d\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\u306e\u307f\u3067\u3042\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30f3\u30d0\u30fc\uff1a<\/strong> <code>\u6b8b\u9ad8<\/code> \u5909\u6570\u306f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u306b\u3059\u308b\u3079\u304d\u3067\u3059\u3002\u5916\u90e8\u30af\u30e9\u30b9\u306f\u305d\u308c\u3092\u76f4\u63a5\u5909\u66f4\u3067\u304d\u307e\u305b\u3093\u3002<\/li>\n<li><strong>\u30d1\u30d6\u30ea\u30c3\u30af\u30b2\u30c3\u30bf\u30fc\uff0f\u30bb\u30c3\u30bf\u30fc\uff1a<\/strong> A <code>getBalance()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u5024\u306e\u8aad\u307f\u53d6\u308a\u3092\u8a31\u53ef\u3059\u308b\u4e00\u65b9\u3001<code>updateBalance()<\/code>\u30e1\u30bd\u30c3\u30c9\u306f\u9810\u3051\u5165\u308c\u307e\u305f\u306f\u51fa\u91d1\u306e\u30ed\u30b8\u30c3\u30af\u3092\u901a\u3058\u3066\u6709\u52b9\u306a\u5909\u66f4\u306e\u307f\u3092\u53d7\u3051\u5165\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u4e0a\u306e\u5229\u70b9\uff1a<\/strong>\u30af\u30e9\u30b9\u30b9\u30b3\u30fc\u30d7\u5916\u304b\u3089\u306e\u91d1\u878d\u8a18\u9332\u306e\u4e0d\u6b63\u306a\u5909\u66f4\u3092\u9632\u304e\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>3.2 \u7d99\u627f \ud83c\udf33<\/h3>\n<p>\u7d99\u627f\u306b\u3088\u308a\u3001\u65b0\u3057\u3044\u30af\u30e9\u30b9\u304c\u65e2\u5b58\u306e\u30af\u30e9\u30b9\u304b\u3089\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u632f\u308b\u821e\u3044\u3092\u5f15\u304d\u7d99\u3050\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u304c\u6e1b\u308a\u3001\u518d\u5229\u7528\u6027\u304c\u5411\u4e0a\u3057\u307e\u3059\u3002\u7570\u306a\u308b\u53e3\u5ea7\u30bf\u30a4\u30d7\u306f\u5171\u901a\u306e\u6a5f\u80fd\u3092\u5171\u6709\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u305d\u308c\u305e\u308c\u56fa\u6709\u306e\u30eb\u30fc\u30eb\u3092\u6301\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u57fa\u5e95\u30af\u30e9\u30b9\uff1a<\/strong> <code>Account<\/code>\u306b\u306f\u3001<code>accountNumber<\/code> \u304a\u3088\u3073 <code>balance<\/code>.<\/li>\n<li><strong>\u6d3e\u751f\u30af\u30e9\u30b9\uff1a<\/strong> <code>SavingsAccount<\/code> \u304a\u3088\u3073 <code>CheckingAccount<\/code>\u306f<code>Account<\/code>.<\/li>\n<li><strong>\u7279\u6b8a\u5316\uff1a<\/strong> <code>SavingsAccount<\/code>\u306f<code>interestRate<\/code>\u5c5e\u6027\u3092\u8ffd\u52a0\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u304c\u3001<code>CheckingAccount<\/code>\u306f<code>\u53d6\u5f15\u5236\u9650<\/code> \u5c5e\u6027\u3002<\/li>\n<\/ul>\n<h3>3.3 \u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0 \ud83d\udd04<\/h3>\n<p>\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0\u306b\u3088\u308a\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u5b9f\u969b\u306e\u30af\u30e9\u30b9\u3067\u306f\u306a\u304f\u3001\u89aa\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3057\u3066\u6271\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u7570\u306a\u308b\u53e3\u5ea7\u30bf\u30a4\u30d7\u3092\u4e00\u8cab\u3057\u3066\u6271\u3046\u5834\u5408\u3084\u3001\u7570\u306a\u308b\u8a08\u7b97\u30ed\u30b8\u30c3\u30af\u3092\u9069\u7528\u3059\u308b\u5834\u5408\u306b\u7279\u306b\u91cd\u8981\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c7\u30a3\u30f3\u30b0\uff1a<\/strong> \u540d\u524d\u304c <code>calculateInterest<\/code> \u306f\u7570\u306a\u308b\u30d1\u30e9\u30e1\u30fc\u30bf\uff08\u4f8b\uff1a\u671f\u9593 vs. \u5229\u7387\uff09\u3092\u53d7\u3051\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/li>\n<li><strong>\u30e1\u30bd\u30c3\u30c9\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff1a<\/strong> \u305d\u306e <code>calculateInterest<\/code> \u30e1\u30bd\u30c3\u30c9\u306f\u3001\u8caf\u84c4\u53e3\u5ea7\u3068\u5b9a\u671f\u9810\u91d1\u306b\u5bfe\u3057\u3066\u7570\u306a\u308b\u632f\u308b\u821e\u3044\u3092\u793a\u3057\u307e\u3059\u3002\u30b7\u30b9\u30c6\u30e0\u306f\u5b9f\u884c\u6642\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30bf\u30a4\u30d7\u306b\u57fa\u3065\u3044\u3066\u3001\u7279\u5b9a\u306e\u5b9f\u88c5\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u5229\u70b9\uff1a<\/strong> \u4e3b\u8981\u306a\u30b7\u30b9\u30c6\u30e0\u30ed\u30b8\u30c3\u30af\u306f\u3001\u8a08\u7b97\u3092\u958b\u59cb\u3059\u308b\u305f\u3081\u306b\u7279\u5b9a\u306e\u53e3\u5ea7\u30bf\u30a4\u30d7\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u89aa\u53c2\u7167\u4e0a\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3060\u3051\u3067\u6e08\u307f\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>3.4 \u62bd\u8c61\u5316 \ud83e\udde9<\/h3>\n<p>\u62bd\u8c61\u5316\u306f\u3001\u8907\u96d1\u306a\u5b9f\u88c5\u306e\u8a73\u7d30\u3092\u96a0\u3057\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u5fc5\u8981\u306a\u6a5f\u80fd\u306e\u307f\u3092\u63d0\u793a\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30e6\u30fc\u30b6\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3068\u30d0\u30c3\u30af\u30a8\u30f3\u30c9\u30ed\u30b8\u30c3\u30af\u306e\u9593\u306e\u3084\u308a\u53d6\u308a\u304c\u7c21\u7d20\u5316\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff1a<\/strong> \u6b21\u306e <code>PaymentGateway<\/code> \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u306e\u4e2d\u306b <code>processPayment<\/code> \u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3081\u308b\u3002<\/li>\n<li><strong>\u5b9f\u88c5\uff1a<\/strong> \u7570\u306a\u308b\u6c7a\u6e08\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\uff08\u5185\u90e8\u9001\u91d1\u3001\u5916\u90e8\u9001\u91d1\u3001\u30ab\u30fc\u30c9\uff09\u306f\u3001\u3053\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u305d\u308c\u305e\u308c\u7570\u306a\u308b\u65b9\u6cd5\u3067\u5b9f\u88c5\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u5229\u70b9\uff1a<\/strong> \u9280\u884c\u304c\u6c7a\u6e08\u30d7\u30ed\u30d0\u30a4\u30c0\u30fc\u3092\u5207\u308a\u66ff\u3048\u305f\u5834\u5408\u3067\u3082\u3001\u30b3\u30a2\u30b7\u30b9\u30c6\u30e0\u30ed\u30b8\u30c3\u30af\u306f\u5909\u66f4\u3055\u308c\u307e\u305b\u3093\u3002\u5909\u66f4\u3055\u308c\u308b\u306e\u306f\u5b9f\u88c5\u30af\u30e9\u30b9\u3060\u3051\u3067\u3059\u3002<\/li>\n<\/ul>\n<h2>4. \u91d1\u878d\u30ed\u30b8\u30c3\u30af\u5411\u3051\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3 \ud83d\udee0\ufe0f<\/h2>\n<p>\u57fa\u672c\u7684\u306a\u539f\u5247\u3092\u8d85\u3048\u3066\u3001\u7279\u5b9a\u306e\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u306f\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306b\u304a\u3051\u308b\u7e70\u308a\u8fd4\u3057\u767a\u751f\u3059\u308b\u554f\u984c\u3092\u89e3\u6c7a\u3057\u307e\u3059\u3002<\/p>\n<h3>4.1 \u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3 \ud83d\udd75\ufe0f<\/h3>\n<p>\u305d\u306e <code>\u9280\u884c<\/code>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u4e00\u610f\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30ec\u30b8\u30e3\u30fc\u3092\u7ba1\u7406\u3059\u308b\u4e2d\u592e\u306e\u6a29\u9650\u306f\u4e00\u3064\u3060\u3051\u3067\u3042\u308b\u3079\u304d\u3067\u3059\u3002\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3\u306b\u3088\u308a\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u5168\u4f53\u3067Bank\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u4e00\u3064\u3060\u3051\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u30b1\u30fc\u30b9\uff1a<\/strong>\u30b0\u30ed\u30fc\u30d0\u30eb\u306a\u8a2d\u5b9a\u7ba1\u7406\u3001\u307e\u305f\u306f\u4e2d\u592e\u306e\u30ec\u30b8\u30e3\u30fc\u30b5\u30fc\u30d3\u30b9\u3002<\/li>\n<li><strong>\u5236\u7d04\uff1a<\/strong>\u4e26\u884c\u30a2\u30af\u30bb\u30b9\u4e2d\u306b\u7af6\u5408\u72b6\u614b\u304c\u767a\u751f\u3057\u306a\u3044\u3088\u3046\u306b\u3001\u30b9\u30ec\u30c3\u30c9\u30bb\u30fc\u30d5\u3092\u78ba\u4fdd\u3059\u308b\u3002<\/li>\n<\/ul>\n<h3>4.2 \u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30d1\u30bf\u30fc\u30f3 \ud83c\udfed<\/h3>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u306f\u8907\u96d1\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u30d5\u30a1\u30af\u30c8\u30ea\u30fc\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u6b63\u78ba\u306a\u30af\u30e9\u30b9\u3092\u6307\u5b9a\u305b\u305a\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u65b0\u3057\u3044\u53e3\u5ea7\u30bf\u30a4\u30d7\u3092\u4f5c\u6210\u3059\u308b\u969b\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<ul>\n<li><strong>\u30b7\u30ca\u30ea\u30aa\uff1a<\/strong> \u30e6\u30fc\u30b6\u30fc\u304c\u53e3\u5ea7\u958b\u8a2d\u6642\u306b\u300c\u8caf\u84c4\u300d\u307e\u305f\u306f\u300c\u666e\u901a\u300d\u3092\u9078\u629e\u3059\u308b\u3002<\/li>\n<li><strong>\u30ed\u30b8\u30c3\u30af\uff1a<\/strong> \u30d5\u30a1\u30af\u30c8\u30ea\u30af\u30e9\u30b9\u304c\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u691c\u67fb\u3057\u3001\u9069\u5207\u306aAccount\u306e\u30b5\u30d6\u30af\u30e9\u30b9\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u8fd4\u3059\u3002<\/li>\n<li><strong>\u5229\u70b9\uff1a<\/strong> \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b3\u30fc\u30c9\u306f\u5177\u4f53\u7684\u306a\u30af\u30e9\u30b9\u304b\u3089\u5206\u96e2\u3055\u308c\u305f\u307e\u307e\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h3>4.3 \u30b9\u30c8\u30e9\u30c6\u30b8\u30fc\u30d1\u30bf\u30fc\u30f3 \ud83e\udded<\/h3>\n<p>\u624b\u6570\u6599\u8a08\u7b97\u3084\u91d1\u5229\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306f\u3055\u307e\u3056\u307e\u3067\u3059\u3002\u30b9\u30c8\u30e9\u30c6\u30b8\u30fc\u30d1\u30bf\u30fc\u30f3\u306f\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5bb6\u65cf\u3092\u5b9a\u7fa9\u3057\u3001\u305d\u308c\u305e\u308c\u3092\u30ab\u30d7\u30bb\u30eb\u5316\u3057\u3001\u76f8\u4e92\u306b\u4ea4\u63db\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>\u4f8b\uff1a<\/strong> \u7570\u306a\u308b\u652f\u5e97\u3067\u306f\u7570\u306a\u308b\u624b\u6570\u6599\u69cb\u9020\u3092\u6301\u3064\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5b9f\u88c5\uff1a<\/strong> \u3042\u308b <code>\u624b\u6570\u6599\u6226\u7565<\/code> \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f <code>\u6a19\u6e96\u624b\u6570\u6599\u6226\u7565<\/code>, <code>\u30d7\u30ec\u30df\u30a2\u30e0\u624b\u6570\u6599\u6226\u7565<\/code>\u3001\u306a\u3069<\/li>\n<li><strong>\u5229\u70b9\uff1a<\/strong> \u624b\u6570\u6599\u30dd\u30ea\u30b7\u30fc\u3092\u5909\u66f4\u3057\u3066\u3082\u3001\u30b3\u30a2\u306e\u53d6\u5f15\u30af\u30e9\u30b9\u3092\u5909\u66f4\u3059\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/li>\n<\/ul>\n<h2>5. \u53d6\u5f15\u7ba1\u7406\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3 \ud83d\udee1\ufe0f<\/h2>\n<p>\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u306f\u3001\u304a\u91d1\u304c\u6c7a\u3057\u3066\u5931\u308f\u308c\u305f\u308a\u91cd\u8907\u3057\u305f\u308a\u3057\u306a\u3044\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3053\u308c\u306b\u306f\u53b3\u683c\u306a\u53d6\u5f15\u7ba1\u7406\u3068\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<h3>5.1 ACID\u30d7\u30ed\u30d1\u30c6\u30a3<\/h3>\n<p>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306f\u539f\u5b50\u6027\u3001\u6574\u5408\u6027\u3001\u5206\u96e2\u6027\u3001\u8010\u4e45\u6027\u3092\u9075\u5b88\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff1a<\/strong> \u8ee2\u9001\u306b\u306f2\u3064\u306e\u30b9\u30c6\u30c3\u30d7\u304c\u3042\u308b\uff1a\u9001\u4fe1\u5143\u3092\u5f15\u304d\u51fa\u3057\u3001\u5b9b\u5148\u306b\u632f\u308a\u8fbc\u307f\u3002\u4e21\u65b9\u3068\u3082\u6210\u529f\u3059\u308b\u304b\u3001\u4e21\u65b9\u3068\u3082\u5931\u6557\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<li><strong>\u6574\u5408\u6027\uff1a<\/strong> \u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u306e\u524d\u5f8c\u3067\u6709\u52b9\u306a\u72b6\u614b\u3092\u7dad\u6301\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<li><strong>\u5206\u96e2\u6027\uff1a<\/strong> \u540c\u6642\u5b9f\u884c\u3055\u308c\u308b\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u540c\u58eb\u304c\u4e92\u3044\u306b\u5e72\u6e09\u3057\u3066\u306f\u306a\u3089\u306a\u3044\uff08\u4f8b\uff1a2\u4eba\u306e\u30e6\u30fc\u30b6\u30fc\u304c\u540c\u6642\u306b\u540c\u3058\u6b8b\u9ad8\u3092\u5f15\u304d\u51fa\u3057\u8a66\u307f\u308b\u306a\u3069\uff09\u3002<\/li>\n<li><strong>\u8010\u4e45\u6027\uff1a<\/strong> \u30b3\u30df\u30c3\u30c8\u3055\u308c\u305f\u5f8c\u306f\u3001\u5909\u66f4\u304c\u30b7\u30b9\u30c6\u30e0\u969c\u5bb3\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u4fdd\u6301\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<\/ul>\n<h3>5.2 \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/h3>\n<p>\u30c7\u30fc\u30bf\u306e\u4fdd\u8b77\u306f\u6700\u512a\u5148\u4e8b\u9805\u3067\u3042\u308b\u3002\u6697\u53f7\u5316\u3068\u8a8d\u8a3c\u306f\u4e0d\u53ef\u6b20\u3067\u3042\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30c7\u30fc\u30bf\u6697\u53f7\u5316\uff1a<\/strong> \u53e3\u5ea7\u756a\u53f7\u3084\u500b\u4eba\u60c5\u5831\u306a\u3069\u306e\u6a5f\u5bc6\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u3001\u4fdd\u5b58\u6642\u304a\u3088\u3073\u9001\u4fe1\u4e2d\u306b\u304a\u3044\u3066\u6697\u53f7\u5316\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<li><strong>\u8a8d\u8a3c\uff1a<\/strong> \u9ad8\u984d\u306a\u53d6\u5f15\u306b\u5bfe\u3057\u3066\u306f\u3001\u591a\u8981\u7d20\u8a8d\u8a3c\uff08MFA\uff09\u3092\u5f37\u5236\u3059\u3079\u304d\u3067\u3042\u308b\u3002<\/li>\n<li><strong>\u30ed\u30b0\u8a18\u9332\uff1a<\/strong> \u3059\u3079\u3066\u306e\u64cd\u4f5c\u306f\u3001\u6539\u3056\u3093\u4e0d\u53ef\u80fd\u306a\u76e3\u67fb\u30ed\u30b0\u306b\u8a18\u9332\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u4e0d\u6b63\u30a2\u30af\u30bb\u30b9\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u30d5\u30a9\u30ec\u30f3\u30b8\u30c3\u30af\u5206\u6790\u306b\u5f79\u7acb\u3064\u3002<\/li>\n<li><strong>\u691c\u8a3c\uff1a<\/strong> \u5165\u529b\u691c\u8a3c\u306f\u30a4\u30f3\u30b8\u30a7\u30af\u30b7\u30e7\u30f3\u653b\u6483\u3092\u9632\u3050\u3002\u3059\u3079\u3066\u306e\u30e6\u30fc\u30b6\u30fc\u5165\u529b\u306f\u51e6\u7406\u524d\u306b\u30af\u30ea\u30fc\u30cb\u30f3\u30b0\u3055\u308c\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/li>\n<\/ul>\n<h2>6. \u7570\u5e38\u30b1\u30fc\u30b9\u304a\u3088\u3073\u30a8\u30e9\u30fc\u306e\u51e6\u7406 \u26a0\ufe0f<\/h2>\n<p>\u5805\u7262\u306a\u30b7\u30b9\u30c6\u30e0\u306f\u969c\u5bb3\u3092\u4e88\u6e2c\u3059\u308b\u3002\u8a2d\u8a08\u306f\u901a\u5e38\u306e\u4f7f\u7528\u7bc4\u56f2\u5916\u306e\u72b6\u6cc1\u3092\u51e6\u7406\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002<\/p>\n<h3>6.1 \u6b8b\u9ad8\u4e0d\u8db3<\/h3>\n<p>\u51fa\u91d1\u30e1\u30bd\u30c3\u30c9\u306f\u51e6\u7406\u524d\u306b\u6b8b\u9ad8\u3092\u78ba\u8a8d\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u6b8b\u9ad8\u304c\u4e0d\u8db3\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u7279\u5b9a\u306e\u4f8b\u5916\u3092\u30b9\u30ed\u30fc\u3059\u308b\u304b\u3001\u30a8\u30e9\u30fc\u72b6\u614b\u3092\u8fd4\u3059\u5fc5\u8981\u304c\u3042\u308b\u3002\u3053\u308c\u306b\u3088\u308a\u3001 overdraft\u4fdd\u8b77\u304c\u6709\u52b9\u3067\u306a\u3044\u9650\u308a\u3001\u6b8b\u9ad8\u304c\u30de\u30a4\u30ca\u30b9\u306b\u306a\u308b\u3053\u3068\u3092\u9632\u3050\u3002<\/p>\n<h3>6.2 \u540c\u6642\u30a2\u30af\u30bb\u30b9<\/h3>\n<p>\u30ed\u30c3\u30af\u30e1\u30ab\u30cb\u30ba\u30e0\uff08\u4f8b\uff1a\u697d\u89b3\u7684\u30ed\u30c3\u30af\u307e\u305f\u306f\u60b2\u89b3\u7684\u30ed\u30c3\u30af\uff09\u306b\u3088\u308a\u30012\u3064\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u304c\u540c\u3058\u53e3\u5ea7\u3092\u540c\u6642\u306b\u5909\u66f4\u3059\u308b\u306e\u3092\u9632\u3050\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u6b8b\u9ad8\u304c\u66f4\u65b0\u3055\u308c\u308b\u524d\u306b2\u56de\u8aad\u307f\u8fbc\u307e\u308c\u308b\u7af6\u5408\u72b6\u614b\u3092\u56de\u907f\u3067\u304d\u308b\u3002<\/p>\n<h3>6.3 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u969c\u5bb3<\/h3>\n<p>\u8ee2\u9001\u4e2d\u306b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u3059\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u306f\u969c\u5bb3\u304c\u901a\u77e5\u3055\u308c\u3001\u8cc7\u91d1\u306f\u9001\u4fe1\u5143\u53e3\u5ea7\u306b\u7559\u307e\u308b\u3079\u304d\u3067\u3042\u308b\u3002<\/p>\n<h2>7. \u30c6\u30b9\u30c8\u3068\u691c\u8a3c \ud83e\uddea<\/h2>\n<p>\u5c55\u958b\u524d\u306b\u3001\u30b7\u30b9\u30c6\u30e0\u306f\u4fe1\u983c\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u53b3\u5bc6\u306a\u30c6\u30b9\u30c8\u3092\u53d7\u3051\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30e6\u30cb\u30c3\u30c8\u30c6\u30b9\u30c8\uff1a<\/strong> \u500b\u5225\u306e\u30af\u30e9\u30b9\uff08\u4f8b\uff1a<code>Account.calculateInterest<\/code>\uff09\u3092\u72ec\u7acb\u3057\u3066\u30c6\u30b9\u30c8\u3057\u3001\u8ad6\u7406\u306e\u6b63\u5f53\u6027\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<li><strong>\u7d71\u5408\u30c6\u30b9\u30c8\uff1a<\/strong>Account\u30af\u30e9\u30b9\u304cTransaction\u5c64\u304a\u3088\u3073Database\u5c64\u3068\u3069\u306e\u3088\u3046\u306b\u9023\u643a\u3059\u308b\u304b\u3092\u691c\u8a3c\u3059\u308b\u3002<\/li>\n<li><strong>\u8ca0\u8377\u30c6\u30b9\u30c8\uff1a<\/strong>\u30d4\u30fc\u30af\u6642\u306e\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\uff08\u4f8b\uff1a\u6708\u672b\u306e\u7d66\u4e0e\u632f\u8fbc\uff09\u3092\u30b7\u30df\u30e5\u30ec\u30fc\u30c8\u3057\u3001\u30b7\u30b9\u30c6\u30e0\u304c\u4e26\u884c\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u51e6\u7406\u3057\u3066\u3082\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3059\u308b\u3002<\/li>\n<li><strong>\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30c6\u30b9\u30c8\uff1a<\/strong>\u4fb5\u5165\u30c6\u30b9\u30c8\u3092\u5b9f\u65bd\u3057\u3001\u8a8d\u8a3c\u304a\u3088\u3073\u30c7\u30fc\u30bf\u51e6\u7406\u306b\u304a\u3051\u308b\u8106\u5f31\u6027\u3092\u7279\u5b9a\u3059\u308b\u3002<\/li>\n<\/ul>\n<h2>8. \u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u6027\u3068\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3 \ud83d\udd27<\/h2>\n<p>\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u306f\u30ea\u30ea\u30fc\u30b9\u6642\u70b9\u3067\u7d42\u308f\u3089\u306a\u3044\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u69cb\u9020\u306b\u3088\u308a\u3001\u5c06\u6765\u306e\u5909\u66f4\u304c\u5bb9\u6613\u306b\u306a\u308b\u3002<\/p>\n<ul>\n<li><strong>\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\uff1a<\/strong>\u65b0\u3057\u3044\u53e3\u5ea7\u30bf\u30a4\u30d7\u304c\u5fc5\u8981\u306a\u5834\u5408\u3001\u958b\u767a\u8005\u306f\u65e2\u5b58\u306e\u30b3\u30fc\u30c9\u3092\u5909\u66f4\u305b\u305a\u306b\u65b0\u3057\u3044\u30b5\u30d6\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3067\u304d\u308b\u3002<\/li>\n<li><strong>\u30ea\u30d5\u30a1\u30af\u30bf\u30ea\u30f3\u30b0\uff1a<\/strong>\u8981\u4ef6\u304c\u5909\u5316\u3057\u3066\u3082\u3001\u5185\u90e8\u30e1\u30bd\u30c3\u30c9\u3092\u6700\u9069\u5316\u3067\u304d\u308b\u304c\u3001\u5916\u90e8\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u306f\u5f71\u97ff\u3057\u306a\u3044\u3002<\/li>\n<li><strong>\u30b9\u30b1\u30fc\u30e9\u30d3\u30ea\u30c6\u30a3\uff1a<\/strong>\u95a2\u5fc3\u306e\u5206\u96e2\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u30b5\u30fc\u30d3\u30b9\u3092\u6c34\u5e73\u65b9\u5411\u306b\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u3067\u304d\u308b\uff08\u4f8b\uff1aTransaction\u30b5\u30fc\u30d3\u30b9\u306fUser Profile\u30b5\u30fc\u30d3\u30b9\u3068\u306f\u72ec\u7acb\u3057\u3066\u30b9\u30b1\u30fc\u30ea\u30f3\u30b0\u53ef\u80fd\uff09\u3002<\/li>\n<\/ul>\n<h2>9. \u8a2d\u8a08\u610f\u601d\u6c7a\u5b9a\u306e\u8981\u7d04 \ud83d\udcdd<\/h2>\n<p>\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u9280\u884c\u696d\u52d9\u306e\u8981\u4ef6\u3068OOAD\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u306e\u5bfe\u5fdc\u95a2\u4fc2\u3092\u8981\u7d04\u3057\u305f\u3082\u306e\u3067\u3042\u308b\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u8981\u4ef6<\/th>\n<th>OOAD\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3<\/th>\n<th>\u5229\u70b9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u5b89\u5168\u306a\u30c7\u30fc\u30bf\u30a2\u30af\u30bb\u30b9<\/td>\n<td>\u30ab\u30d7\u30bb\u30eb\u5316<\/td>\n<td>\u4e0d\u6b63\u306a\u6b8b\u9ad8\u5909\u66f4\u3092\u9632\u6b62\u3059\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u7570\u306a\u308b\u53e3\u5ea7\u30bf\u30a4\u30d7<\/td>\n<td>\u7d99\u627f<\/td>\n<td>\u30b3\u30fc\u30c9\u306e\u91cd\u8907\u3092\u524a\u6e1b\u3059\u308b<\/td>\n<\/tr>\n<tr>\n<td>\u5909\u52d5\u3059\u308b\u91d1\u5229\u30ed\u30b8\u30c3\u30af<\/td>\n<td>\u30dd\u30ea\u30e2\u30fc\u30d5\u30a3\u30ba\u30e0<\/td>\n<td>\u67d4\u8edf\u306a\u8a08\u7b97\u6226\u7565<\/td>\n<\/tr>\n<tr>\n<td>\u8907\u6570\u306e\u652f\u6255\u3044\u65b9\u6cd5<\/td>\n<td>\u62bd\u8c61\u5316<\/td>\n<td>\u65b0\u3057\u3044\u6c7a\u6e08\u30b2\u30fc\u30c8\u30a6\u30a7\u30a4\u306e\u7c21\u5358\u306a\u7d71\u5408<\/td>\n<\/tr>\n<tr>\n<td>\u4e2d\u592e\u306e\u53f0\u5e33<\/td>\n<td>\u30b7\u30f3\u30b0\u30eb\u30c8\u30f3\u30d1\u30bf\u30fc\u30f3<\/td>\n<td>\u552f\u4e00\u306e\u771f\u5b9f\u306e\u30bd\u30fc\u30b9\u3092\u4fdd\u8a3c\u3059\u308b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>10. 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\ud83d\ude80<\/h2>\n<p>\u6280\u8853\u304c\u9032\u5316\u3059\u308b\u306b\u3064\u308c\u3066\u3001\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u306f\u305d\u308c\u306b\u9069\u5fdc\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u73fe\u4ee3\u306e\u30c8\u30ec\u30f3\u30c9\u306b\u306f\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u51e6\u7406\u3001\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u306e\u7d71\u5408\u3001AI\u99c6\u52d5\u306e\u4e0d\u6b63\u691c\u51fa\u304c\u542b\u307e\u308c\u308b\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u306e\u57fa\u76e4\u306f\u3001\u3053\u308c\u3089\u306e\u65b0\u3057\u3044\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u65b0\u3057\u3044\u30af\u30e9\u30b9\u3084\u6226\u7565\u3068\u3057\u3066\u7d71\u5408\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30a2\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u5d29\u3059\u3053\u3068\u306a\u304f\u3001\u4f9d\u7136\u3068\u3057\u3066\u95a2\u9023\u6027\u3092\u6301\u3063\u3066\u3044\u308b\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u53f0\u5e33\u3092\u7d71\u5408\u3059\u308b\u306b\u306f\u3001\u65b0\u3057\u3044\u300c<code>\u30d6\u30ed\u30c3\u30af\u30c1\u30a7\u30fc\u30f3\u53f0\u5e33<\/code>\u300d\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3001\u65e2\u5b58\u306e\u300c<code>\u53f0\u5e33<\/code>\u300d\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002\u30b7\u30b9\u30c6\u30e0\u306e\u4ed6\u306e\u90e8\u5206\u306f\u3053\u306e\u5909\u66f4\u306b\u6c17\u3065\u304b\u306a\u3044\u3002\u3053\u306e\u30e2\u30b8\u30e5\u30fc\u30eb\u6027\u304c\u3001\u91d1\u878d\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u958b\u767a\u306b\u304a\u3051\u308bOOAD\u30a2\u30d7\u30ed\u30fc\u30c1\u306e\u4e3b\u306a\u5229\u70b9\u3067\u3042\u308b\u3002<\/p>\n<h2>11. 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\ud83d\udc68\u200d\ud83d\udcbb<\/h2>\n<ul>\n<li><strong>\u5206\u6790\u304b\u3089\u59cb\u3081\u308b\uff1a<\/strong>\u30af\u30e9\u30b9\u3092\u8a2d\u8a08\u3059\u308b\u524d\u306b\u3001\u30d3\u30b8\u30cd\u30b9\u30eb\u30fc\u30eb\u3092\u7406\u89e3\u3059\u308b\u3002<\/li>\n<li><strong>\u62bd\u8c61\u5316\u3092\u4f7f\u3046\uff1a<\/strong>\u660e\u78ba\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u80cc\u5f8c\u306b\u8907\u96d1\u3055\u3092\u96a0\u3059\u3002<\/li>\n<li><strong>\u30c7\u30fc\u30bf\u3092\u5b89\u5168\u306b\u4fdd\u3064\uff1a<\/strong>\u6a5f\u5bc6\u6027\u306e\u9ad8\u3044\u5909\u6570\u3092\u516c\u958b\u3057\u306a\u3044\u3002<\/li>\n<li><strong>\u5909\u5316\u306b\u5099\u3048\u308b\uff1a<\/strong>\u5c06\u6765\u306e\u8981\u4ef6\u306b\u5bfe\u5fdc\u3059\u308b\u305f\u3081\u306b\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3092\u4f7f\u3046\u3002<\/li>\n<li><strong>\u5fb9\u5e95\u7684\u306b\u30c6\u30b9\u30c8\u3059\u308b\uff1a<\/strong>\u91d1\u878d\u4e0a\u306e\u8aa4\u308a\u306f\u9ad8\u30b3\u30b9\u30c8\u306b\u306a\u308b\u305f\u3081\u3001\u691c\u8a3c\u304c\u9375\u3068\u306a\u308b\u3002<\/li>\n<\/ul>\n<p>\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u306f\u3001\u614e\u91cd\u306a\u8a08\u753b\u3068\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9\u306e\u9075\u5b88\u3092\u5fc5\u8981\u3068\u3059\u308b\u8907\u96d1\u306a\u4f5c\u696d\u3067\u3042\u308b\u3002\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6307\u5411\u5206\u6790\u3068\u8a2d\u8a08\u306e\u539f\u5247\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u958b\u767a\u8005\u306f\u4eca\u65e5\u6a5f\u80fd\u3059\u308b\u3060\u3051\u3067\u306a\u304f\u3001\u5c06\u6765\u306b\u3082\u5bfe\u5fdc\u3067\u304d\u308b\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3067\u304d\u308b\u3002\u3053\u306e\u69cb\u9020\u7684\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306b\u3088\u308a\u3001\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306f\u30e9\u30a4\u30d5\u30b5\u30a4\u30af\u30eb\u5168\u4f53\u306b\u308f\u305f\u308a\u3001\u5b89\u5168\u3067\u3001\u4fdd\u5b88\u53ef\u80fd\u3067\u3001\u52b9\u7387\u7684\u3067\u3042\u308b\u3053\u3068\u304c\u4fdd\u8a3c\u3055\u308c\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5805\u7262\u306a\u91d1\u878d\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u306b\u306f\u3001\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u30b9\u30ad\u30eb&hellip;<\/p>\n","protected":false},"author":1,"featured_media":723,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_title":"OOP\u306e\u539f\u5247\u3092\u7528\u3044\u305f\u9280\u884c\u30b7\u30b9\u30c6\u30e0\u306e\u8a2d\u8a08 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