{"id":679,"date":"2022-10-04T22:46:12","date_gmt":"2022-10-04T14:46:12","guid":{"rendered":"https:\/\/qaqaq.top\/?p=679"},"modified":"2022-11-27T12:39:57","modified_gmt":"2022-11-27T04:39:57","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b8%ad-%e7%bb%a7%e6%89%bf%e6%80%a7%e7%9a%84%e7%90%86%e8%a7%a3%e3%80%81%e7%bb%a7%e6%89%bf%e6%80%a7%e7%9a%84%e4%bd%bf%e7%94%a8%e3%80%81%e7%bb%a7%e6%89%bf","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=679","title":{"rendered":"\u9762\u5411\u5bf9\u8c61(\u4e2d)-\u7ee7\u627f\u6027\u7684\u7406\u89e3\u3001\u7ee7\u627f\u6027\u7684\u4f7f\u7528\u3001\u7ee7\u627f\u6027\u7684\u518d\u8bf4\u660e\u3001Object\u7c7b\u7684\u7406\u89e3"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P260;\r\n\r\npublic class Creature {\r\n\t\r\n\tpublic void breath() {\r\n\t\tSystem.out.println(\"\u547c\u5438\");\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P260;\r\n\r\npublic class Person extends Creature{\r\n\r\n\tString name;\r\n\tprivate int age;\r\n\t\r\n\tpublic Person() {\r\n\t\t\r\n\t}\r\n\t\r\n\tpublic Person(String name, int age) {\r\n\t\tthis.name = name;\r\n\t\tthis.age = age;\r\n\t}\r\n\t\r\n\tpublic void eat() {\r\n\t\tSystem.out.println(\"\u5403\u996d\");\r\n\t\tsleep();\r\n\t}\r\n\t\r\n\tprivate void sleep() {\r\n\t\tSystem.out.println(\"\u7761\u89c9\");\r\n\t}\r\n\r\n\tpublic int getAge() {\r\n\t\treturn age;\r\n\t}\r\n\r\n\tpublic void setAge(int age) {\r\n\t\tthis.age = age;\r\n\t}\r\n\t\r\n\t\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P260;\r\n\r\npublic class Student extends Person {\r\n\t\r\n\/\/\tString name;\r\n\/\/\tint age;\r\n\tString major;\r\n\t\r\n\tpublic Student() {\r\n\t\t\r\n\t}\r\n\t\r\n\tpublic Student(String name, int age, String major) {\r\n\t\tthis.name = name;\r\n\/\/\t\tthis.age = age;\r\n\t\tsetAge(age);\r\n\t\tthis.major = major;\r\n\t}\r\n\t\r\n\/\/\tpublic void eat() {\r\n\/\/\t\tSystem.out.println(\"\u5403\u996d\");\r\n\/\/\t}\r\n\/\/\t\r\n\/\/\tpublic void sleep() {\r\n\/\/\t\tSystem.out.println(\"\u7761\u89c9\");\r\n\/\/\t}\r\n\t\r\n\tpublic void study() {\r\n\t\tSystem.out.println(\"\u5b66\u4e60\");\r\n\t}\r\n\r\n\tpublic void show() {\r\n\t\tSystem.out.println(\"name:\" + name + \",age:\" + getAge());\r\n\t}\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P260;\r\n\/*\r\n * \t\u9762\u5411\u5bf9\u8c61\u7684\u7279\u5f81\u4e4b\u4e8c\uff1a\u7ee7\u627f\u6027\twhy\uff1f\r\n * \r\n * \u4e00\u3001\u7ee7\u627f\u6027\u7684\u597d\u5904\uff1a\r\n * \u2460 \u51cf\u5c11\u4e86\u4ee3\u7801\u7684\u5197\u4f59\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\r\n * \u2461 \u4fbf\u4e8e\u529f\u80fd\u7684\u6269\u5c55\r\n * \u2462 \u4e3a\u4e4b\u540e\u591a\u6001\u6027\u7684\u4f7f\u7528\uff0c\u63d0\u4f9b\u4e86\u524d\u63d0\r\n * \r\n * \u4e8c\u3001\u7ee7\u627f\u6027\u7684\u683c\u5f0f\uff1aclass A extends B{}\r\n * \t\tA:\u5b50\u7c7b\u3001\u6d3e\u751f\u7c7b\u3001subclass\r\n * \t\tB:\u7236\u7c7b\u3001\u8d85\u7c7b\u3001\u57fa\u7c7b\u3001superclass\r\n * \r\n * \t\t2.1 \u4f53\u73b0\uff1a\u4e00\u65e6\u5b50\u7c7bA\u7ee7\u627f\u7236\u7c7bB\u4ee5\u540e\uff0c\u5b50\u7c7bA\u4e2d\u5c31\u83b7\u53d6\u4e86\u7236\u7c7bB\u4e2d\u58f0\u660e\u7684\u6240\u6709\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\r\n * \t\t\t\u7279\u522b\u7684\uff0c\u7236\u7c7b\u4e2d\u58f0\u660e\u4e3aprivate\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\uff0c\u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u4ee5\u540e\uff0c\u4ecd\u7136\u8ba4\u4e3a\u83b7\u53d6\u4e86\u7236\u7c7b\u4e2d\u79c1\u6709\u7684\u7ed3\u6784\u3002\r\n * \t\t\t\u53ea\u662f\u56e0\u4e3a\u5c01\u88c5\u6027\u7684\u5f71\u54cd\uff0c\u4f7f\u5f97\u5b50\u7c7b\u4e0d\u80fd\u76f4\u63a5\u8c03\u7528\u7236\u7c7b\u7684\u7ed3\u6784\u800c\u5df2\u3002\r\n * \r\n * \t\t2.2 \u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u4ee5\u540e\uff0c\u8fd8\u53ef\u4ee5\u58f0\u660e\u81ea\u5df1\u7279\u6709\u7684\u5c5e\u6027\u6216\u65b9\u6cd5\uff1a\u5b9e\u73b0\u529f\u80fd\u7684\u62d3\u5c55\u3002\r\n * \t\t\t\u5b50\u7c7b\u548c\u7236\u7c7b\u7684\u5173\u7cfb\uff0c\u4e0d\u540c\u4e8e\u5b50\u96c6\u548c\u96c6\u5408\u7684\u5173\u7cfb\u3002\r\n * \t\t\textends\uff1a\u5ef6\u5c55\u3001\u6269\u5c55\r\n * \r\n * \u4e09\u3001Java\u4e2d\u5173\u4e8e\u7ee7\u627f\u6027\u7684\u89c4\u5b9a\uff1a\r\n * \t\t1. \u4e00\u4e2a\u7c7b\u53ef\u4ee5\u88ab\u591a\u4e2a\u5b50\u7c7b\u7ee7\u627f\u3002\r\n * \t\t2. Java\u4e2d\u7c7b\u7684\u5355\u7ee7\u627f\u6027\uff1a\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u7236\u7c7b\r\n * \t\t3. \u5b50\u7236\u7c7b\u662f\u76f8\u5bf9\u7684\u611f\u5ff5\u3002\r\n * \t\t4. \u5b50\u7c7b\u76f4\u63a5\u7ee7\u627f\u7684\u7236\u7c7b\uff0c\u79f0\u4e3a\uff1a\u76f4\u63a5\u7236\u7c7b\u3002\u95f4\u63a5\u7ee7\u627f\u7684\u7236\u7c7b\u79f0\u4e3a\uff1a\u95f4\u63a5\u7236\u7c7b\r\n * \t\t5. \u5b50\u7c7b\u7ee7\u627f\u7236\u7c7b\u4ee5\u540e\uff0c\u5c31\u83b7\u53d6\u4e86\u76f4\u63a5\u7236\u7c7b\u4ee5\u53ca\u6240\u6709\u95f4\u63a5\u7236\u7c7b\u4e2d\u58f0\u660e\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\r\n * \r\n * \u56db\u3001\t1. \u5982\u679c\u6211\u4eec\u6ca1\u6709\u663e\u5f0f\u7684\u58f0\u660e\u4e00\u4e2a\u7c7b\u7684\u7236\u7c7b\u7684\u8bdd\uff0c\u5219\u6b64\u7c7b\u7ee7\u627f\u4e8ejava.lang.Object\u7c7b\r\n * \t\t2. \u6240\u6709\u7684java\u7c7b\uff08\u9664java.lang.Object\u7c7b\u4e4b\u5916\uff09\u90fd\u76f4\u63a5\u6216\u95f4\u63a5\u7684\u7ee7\u627f\u4e8ejava.lang.Object\u7c7b\r\n * \t\t3. \u610f\u5473\u7740\uff0c\u6240\u6709\u7684java\u7c7b\u5177\u6709java.lang.Object\u7c7b\u58f0\u660e\u7684\u529f\u80fd\u3002\r\n * \r\n * \r\n *\/\r\npublic class ExtendsTest {\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\r\n\t\tPerson p1 = new Person();\r\n\/\/\t\tp1.age = 1;\r\n\t\tp1.eat();\r\n\t\tSystem.out.println(\"******************************\");\r\n\t\t\r\n\t\tStudent s1 = new Student();\r\n\t\ts1.eat();\r\n\/\/\t\ts1.sleep();\r\n\t\ts1.name = \"Tom\";\r\n\t\ts1.setAge(10);\r\n\t\tSystem.out.println(s1.getAge());\r\n\t\t\r\n\t\ts1.breath();\r\n\t\t\r\n\t\tCreature c = new Creature();\r\n\t\tSystem.out.println(c.toString());\r\n\t}\r\n\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-679","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\/679"}],"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=679"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/679\/revisions"}],"predecessor-version":[{"id":680,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/679\/revisions\/680"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}