{"id":31477,"date":"2024-01-06T03:56:50","date_gmt":"2023-10-26T03:38:46","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84super%e5%85%b3%e9%94%ae%e5%ad%97-2\/"},"modified":"2024-05-04T17:06:08","modified_gmt":"2024-05-04T09:06:08","slug":"java%e7%9a%84super%e5%85%b3%e9%94%ae%e5%ad%97-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84super%e5%85%b3%e9%94%ae%e5%ad%97-2\/","title":{"rendered":"Java\u7684super\u5173\u952e\u5b57"},"content":{"rendered":"<h1>1. \u4ec0\u4e48\u662f\u8d85\u7ea7\u5173\u952e\u8bcd\uff1f<br \/>\nsh\u00ec c\u00ed?)<\/h1>\n<p>\u8fd9\u662f\u4e00\u4e2a\u5f15\u7528\u8d85\u7c7b\uff08\u7236\u7c7b\uff09\u5bf9\u8c61\u7684\u5173\u952e\u5b57\u3002<\/p>\n<h1>2\uff0c\u6e90\u4ee3\u7801<\/h1>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n\r\n        <span class=\"c1\">\/\/ super = keyword refers to the superclass (parent) of an object<\/span>\r\n        <span class=\"c1\">\/\/         very similar to the \"this\" keyword<\/span>\r\n\r\n        <span class=\"nc\">Hero<\/span> <span class=\"n\">hero1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Hero<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Batman\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">42<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"$$$\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Hero<\/span> <span class=\"n\">hero2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Hero<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Superman\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">43<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"everything\"<\/span><span class=\"o\">);<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hero1<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hero1<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hero1<\/span><span class=\"o\">.<\/span><span class=\"na\">power<\/span><span class=\"o\">);<\/span>\r\n\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">hero2<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">());<\/span>\r\n\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u7c7bPerson\uff08\u8d85\u7c7b\uff09?<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">age<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">age<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">=<\/span> <span class=\"n\">age<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\\n\"<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\\n\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u7ee7\u627f\u81eaPerson\u7c7b\u7684Hero\u7c7b?<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Hero<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">power<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Hero<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">age<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">power<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">,<\/span> <span class=\"n\">age<\/span><span class=\"o\">);<\/span>\r\n\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">power<\/span> <span class=\"o\">=<\/span> <span class=\"n\">power<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">power<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. \u4ec0\u4e48\u662f\u8d85\u7ea7\u5173\u952e\u8bcd\uff1f sh\u00ec c\u00ed?) \u8fd9\u662f\u4e00\u4e2a\u5f15\u7528\u8d85\u7c7b\uff08\u7236\u7c7b\uff09\u5bf9\u8c61\u7684\u5173\u952e\u5b57\u3002 2\uff0c\u6e90\u4ee3\u7801 public  [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31477","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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