{"id":715,"date":"2022-10-06T22:50:43","date_gmt":"2022-10-06T14:50:43","guid":{"rendered":"https:\/\/qaqaq.top\/?p=715"},"modified":"2022-11-27T12:39:56","modified_gmt":"2022-11-27T04:39:56","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b8%ad-%e5%a4%9a%e6%80%81%e6%80%a7%e4%bd%bf%e7%94%a8%e4%b8%be%e4%be%8b","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=715","title":{"rendered":"\u9762\u5411\u5bf9\u8c61(\u4e2d)-\u591a\u6001\u6027\u4f7f\u7528\u4e3e\u4f8b"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P281;\r\n\r\nimport java.sql.Connection;\r\n\r\n\/\/\u591a\u6001\u6027\u7684\u4f7f\u7528\u4e3e\u4f8b\u4e00\uff1a\r\npublic class AnimalTest {\r\n\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\r\n\t\tAnimalTest test = new AnimalTest();\r\n\t\ttest.func(new Dog());\r\n\t\t\r\n\t\ttest.func(new Cat());\r\n\t}\r\n\t\r\n\tpublic void func(Animal animal) {\/\/Animal animal = new Dog();\r\n\t\tanimal.eat();\r\n\t\tanimal.shout();\r\n\t\tif(animal instanceof Dog) {\r\n\t\t\tDog d = (Dog)animal;\r\n\t\t\td.watchDoor();\r\n\t\t}\r\n\t}\r\n\t\r\n\/\/\tpublic void func(Dog dog) {\r\n\/\/\t\tdog.eat();\r\n\/\/\t\tdog.shout();\r\n\/\/\t}\r\n\/\/\t\r\n\/\/\tpublic void func(Cat cat) {\r\n\/\/\t\tcat.eat();\r\n\/\/\t\tcat.shout();\r\n\/\/\t}\r\n}\r\n\r\nclass Animal{\r\n\t\r\n\tpublic void eat() {\r\n\t\tSystem.out.println(\"\u52a8\u7269\uff1a\u8fdb\u98df\");\r\n\t}\r\n\t\r\n\tpublic void shout() {\r\n\t\tSystem.out.println(\"\u52a8\u7269\uff1a\u53eb\");\r\n\t}\r\n}\r\n\r\nclass Dog extends Animal{\r\n\t\r\n\tpublic void eat() {\r\n\t\tSystem.out.println(\"\u72d7\u5403\u9aa8\u5934\");\r\n\t}\r\n\t\r\n\tpublic void shout() {\r\n\t\tSystem.out.println(\"\u6c6a\uff01\u6c6a\uff01\u6c6a\uff01\");\r\n\t}\r\n\t\r\n\tpublic void watchDoor() {\r\n\t\tSystem.out.println(\"\u770b\u95e8\");\r\n\t}\r\n}\r\n\r\nclass Cat extends Animal{\r\n\t\r\n\tpublic void eat() {\r\n\t\tSystem.out.println(\"\u732b\u5403\u9c7c\");\r\n\t}\r\n\t\r\n\tpublic void shout() {\r\n\t\tSystem.out.println(\"\u55b5\uff01\u55b5\uff01\u55b5\uff01\");\r\n\t}\r\n}\r\n\r\n\/\/\u4e3e\u4f8b\u4e8c\uff1a\r\n\r\nclass Order{\r\n\t\r\n\tpublic void method(Object obj) {\r\n\t\t\r\n\t}\r\n}\r\n\r\n\/\/\u4e3e\u4f8b\u4e09\uff1a\r\n\r\nclass Driver{\r\n\t\r\n\tpublic void doData(Connection conn) {\/\/conn = new MySQLConnection(); \/ conn = new OracleConnection();\r\n\t\t\/\/\u89c4\u8303\u7684\u6b65\u9aa4\u53bb\u64cd\u4f5c\u6570\u636e\r\n\/\/\t\tconn.method1();\r\n\/\/\t\tconn.method2();\r\n\/\/\t\tconn.method3();\r\n\t\t\r\n\t}\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46],"class_list":["post-715","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/715"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=715"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/715\/revisions"}],"predecessor-version":[{"id":716,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/715\/revisions\/716"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}