{"id":31463,"date":"2023-08-22T01:39:31","date_gmt":"2023-04-06T12:32:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84abstract%e5%85%b3%e9%94%ae%e5%ad%97\/"},"modified":"2024-01-15T06:45:28","modified_gmt":"2024-01-14T22:45:28","slug":"java%e7%9a%84abstract%e5%85%b3%e9%94%ae%e5%ad%97","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84abstract%e5%85%b3%e9%94%ae%e5%ad%97\/","title":{"rendered":"Java\u7684abstract\u5173\u952e\u5b57"},"content":{"rendered":"<h1>\uff11\uff0c\u62bd\u8c61\u662f\u4ec0\u4e48\u610f\u601d\u3002<\/h1>\n<p>\u62bd\u8c61\u7c7b\u65e0\u6cd5\u5b9e\u4f8b\u5316\uff0c\u4f46\u53ef\u4ee5\u62e5\u6709\u5b50\u7c7b\u3002\u62bd\u8c61\u65b9\u6cd5\u662f\u672a\u5b9e\u73b0\u7684\u58f0\u660e\u3002<\/p>\n<h1>\uff12\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\">\/\/ abstract = abstract classes cannot be instantiated, but they can have a subclass<\/span>\r\n        <span class=\"c1\">\/\/            abstract methods are declared without an implementation<\/span>\r\n        <span class=\"nc\">Car<\/span> <span class=\"n\">car<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Car<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">car<\/span><span class=\"o\">.<\/span><span class=\"na\">go<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<blockquote><p>\u7531\u4e8e\u7236\u7c7b\u5177\u6709\u62bd\u8c61\u5c5e\u6027\uff0c\u65e0\u6cd5\u8fdb\u884c\u5b9e\u4f8b\u5316?<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Vehicle<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"kd\">abstract<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">go<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n<blockquote><p>\u7531\u4e8e\u4eb2\u7c7b\u4e2d\u5b58\u5728\u62bd\u8c61\u65b9\u6cd5\uff0c\u56e0\u6b64\u9700\u8981\u5fc5\u987b\u91cd\u5199\u8be5\u65b9\u6cd5\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Car<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Vehicle<\/span> <span class=\"o\">{<\/span>\r\n\r\n    <span class=\"nd\">@Override<\/span>\r\n    <span class=\"kt\">void<\/span> <span class=\"nf\">go<\/span><span class=\"o\">()<\/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=\"s\">\"The driver is driving the car.\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\uff11\uff0c\u62bd\u8c61\u662f\u4ec0\u4e48\u610f\u601d\u3002 \u62bd\u8c61\u7c7b\u65e0\u6cd5\u5b9e\u4f8b\u5316\uff0c\u4f46\u53ef\u4ee5\u62e5\u6709\u5b50\u7c7b\u3002\u62bd\u8c61\u65b9\u6cd5\u662f\u672a\u5b9e\u73b0\u7684\u58f0\u660e\u3002 \uff12\uff0c\u6e90\u4ee3\u7801 public c [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31463","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) - 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