{"id":31316,"date":"2023-03-27T16:42:17","date_gmt":"2022-11-12T01:13:14","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91%e7%bb%a7%e6%89%bf\/"},"modified":"2025-08-12T23:24:44","modified_gmt":"2025-08-12T15:24:44","slug":"%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91%e7%bb%a7%e6%89%bf","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91%e7%bb%a7%e6%89%bf\/","title":{"rendered":"\u3010Java\u57fa\u7840\u3011\u7ee7\u627f"},"content":{"rendered":"<h1>\u9996\u5148\u6700\u8fd1\u6211\u53c3\u52a0\u4e86Java\u57fa\u790e\u7684\u57f9\u8a13\u3002\u96d6\u7136\u5728\u5b78\u751f\u6642\u671f\u4e0a\u904eJava\u8ab2\u7a0b\uff0c\u6709\u4e00\u4e9b\u57fa\u790e\u5df2\u7d93\u638c\u63e1\uff0c\u4f46\u4e5f\u6709\u4e9b\u5fd8\u8a18\u4e86\uff0c\u6240\u4ee5\u6211\u628a\u5b83\u5011\u5beb\u4e0b\u4f86\u4f5c\u70ba\u5099\u5fd8\u9304\u3002<\/p>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u6982\u8ff0Java\u7684\u57fa\u7840\u77e5\u8bc6\u3002\u8fd9\u6b21\u662f\u5173\u4e8e\u7ee7\u627f\u3002<\/p>\n<h1>\u7ee7\u627f\u662f\u6307\u7ee7\u627f\u662f\u4e00\u79cd\u521b\u5efa\u65b0\u7c7b\u5e76\u7ee7\u627f\u7c7b\u529f\u80fd\u4ee5\u6269\u5c55\u529f\u80fd\u7684\u65b9\u6cd5\u3002<br \/>\n\u5728\u6b64\u8fc7\u7a0b\u4e2d\uff0c\u88ab\u7ee7\u627f\u7684\u7c7b\u88ab\u79f0\u4e3a\u7236\u7c7b(\u8d85\u7c7b)\uff0c\u65b0\u521b\u5efa\u7684\u7c7b\u88ab\u79f0\u4e3a\u5b50\u7c7b(\u5b50\u7c7b)\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u4e0b\u9762\u7684\u5173\u7cfb\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5546\u54c1<\/ul>\n<\/li>\n<\/ul>\n<p>\u672c<br \/>\n\u98df\u6750<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4ece&#8221;\u5546\u54c1&#8221;\u8fd9\u4e2a\u7236\u7c7b\u6d3e\u751f\u51fa\u4e86&#8221;\u672c&#8221;\u548c&#8221;\u98df\u6750&#8221;\u4e24\u4e2a\u5b50\u7c7b\u3002<\/p>\n<h2>\u7ee7\u627f\u7684\u65b9\u6cd5\uff1a\u7ee7\u627f\u7684\u65b9\u5f0f\u5982\u4e0b\u8fdb\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">\u5b50\u30af\u30e9\u30b9<\/span> <span class=\"kd\">extends<\/span> <span class=\"n\">\u89aa\u30af\u30e9\u30b9\u540d<\/span> <span class=\"o\">{<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7ee7\u627f\u7684\u4f8b\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u300c\u5546\u54c1\u300d\u30af\u30e9\u30b9<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Book<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u300c\u672c\u300d\u30af\u30e9\u30b9<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Food<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u300c\u98df\u6750\u300d\u30af\u30e9\u30b9<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u7ee7\u627f\u7684\u6ce8\u610f\u4e8b\u9879 de\u5728\u5229\u7528\u7ee7\u627f\u65f6\uff0c\u8bf7\u6ce8\u610f\u4ee5\u4e0b\u51e0\u70b9\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7c7b<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u53ef\u4ee5\u7ee7\u627f\u5df2\u7ecf\u88ab\u7ee7\u627f\u7684\u7c7b<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u65e0\u6cd5\u4ece\u7236\u7c7b\u5f15\u7528\u5b50\u7c7b\u7684\u6210\u5458<\/ol>\n<h2>\uff08\u53c2\u8003\uff09\u5bf9\u8c61\u7c7b\u6240\u6709\u7684\u7c7b\u90fd\u9690\u5f0f\u5730\u7ee7\u627f\u81eaObject\u7c7b\u3002\u6240\u6709\u7c7b\u7684\u8d77\u6e90\u90fd\u662fObject\u7c7b\u3002<\/p>\n<p>Object\u7c7b\u58f0\u660e\u4e86\u6240\u6709\u7c7b\u90fd\u5e94\u5177\u6709\u7684\u65b9\u6cd5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">toString\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6587\u5b57\u5217\u8868\u73fe\u3092\u8fd4\u3059<\/p>\n<p>equals\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>2\u3064\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u3092\u793a\u3059<\/p>\n<p>\u6bcf\u4e2a\u7c7b\u90fd\u53ef\u4ee5\u8c03\u7528toString\u65b9\u6cd5\u548cequals\u65b9\u6cd5\u3002<\/p>\n<h1>\u8986\u76d6\u8986\u76d6\u662f\u6307\u5728\u5b50\u7c7b\u4e2d\u91cd\u5199\u7236\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u91cd\u5199Object\u7c7b\u7684toString\u65b9\u6cd5\u8bd5\u8bd5\u770b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">price<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">setName<\/span><span class=\"o\">(){<\/span> <span class=\"n\">\u7701\u7565<\/span> <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">setPrice<\/span><span class=\"o\">(){<\/span> <span class=\"n\">\u7701\u7565<\/span> <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"nd\">@Override<\/span> \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=\"n\">name<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"(\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">price<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u5186)\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><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    <span class=\"nc\">Item<\/span> <span class=\"n\">item<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">New<\/span> <span class=\"nf\">Item<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">item<\/span><span class=\"o\">.<\/span><span class=\"na\">setName<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Qiita\u653b\u7565\u672c\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"n\">item<\/span><span class=\"o\">.<\/span><span class=\"na\">setPrice<\/span><span class=\"o\">(<\/span><span class=\"mi\">1000<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"nc\">String<\/span> <span class=\"n\">str<\/span> <span class=\"o\">=<\/span> <span class=\"n\">item<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/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\">str<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ Qiita\u653b\u7565\u672c(1000\u5186)<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u91cd\u5199\u7684\u65b9\u6cd5\u4e2d\u4f7f\u7528super.\u65b9\u6cd5\u540d(\u53c2\u6570\u5217\u8868)\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u8c03\u7528\u7236\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n<h1>\u62bd\u8c61\u65b9\u6cd5\u4e0e\u62bd\u8c61\u7c7b\u5c06\u57fa\u4e8eoverride\u7684\u65b9\u6cd5\u79f0\u4e3a\u62bd\u8c61\u65b9\u6cd5\uff0c\u5c06\u58f0\u660e\u4e86\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u79f0\u4e3a\u62bd\u8c61\u7c7b\u3002\u76f8\u5bf9\u5e94\u5730\uff0c\u6709\u4e9b\u4eba\u4e5f\u5c06\u6ca1\u6709\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u79f0\u4e3a\u5177\u4f53\u7c7b\u3002<\/p>\n<p>\u62bd\u8c61\u7c7b\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4f5c\u6210\u3067\u304d\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u62bd\u8c61\u30af\u30e9\u30b9\u306f\u7d99\u627f\u3055\u308c\u3001\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u308b\u524d\u63d0\u3067\u4f5c\u3089\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u62bd\u8c61\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u306f\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u5168\u3066\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u3068\u306a\u308b<\/ul>\n<h2>\u58f0\u660e\u62bd\u8c61\u7c7b\u548c\u62bd\u8c61\u65b9\u6cd5<br \/>\n\u62bd\u8c61\u65b9\u6cd5\u88ab\u58f0\u660e\u4e3a\u5728\u8fd4\u56de\u7c7b\u578b\u524d\u52a0\u4e0a\u5173\u952e\u8bcd\u201cabstract\u201d\u3002\u6b64\u5916\uff0c\u7531\u4e8e\u5176\u6ca1\u6709\u5177\u4f53\u7684\u5904\u7406\u5185\u5bb9\uff0c\u6240\u4ee5\u7528\u5206\u53f7\u201c;\u201d\u4ee3\u66ff\u4e86\u5927\u62ec\u53f7\u201c{}\u201d\u3002<\/p>\n<p>\u5728\u4f7f\u7528\u62bd\u8c61\u65b9\u6cd5\u65f6\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">\u4fee\u98fe\u5b50<\/span> <span class=\"kd\">abstract<\/span> <span class=\"n\">\u623b\u308a\u5024\u306e\u578b<\/span> <span class=\"n\">\u30e1\u30bd\u30c3\u30c9\u540d<\/span><span class=\"err\">\uff08<\/span><span class=\"n\">\u5f15\u6570\u30ea\u30b9\u30c8<\/span><span class=\"err\">\uff09<\/span><span class=\"o\">;<\/span>\r\n<\/code><\/pre>\n<p>\u4e0e\u62bd\u8c61\u7c7b\u7684\u62bd\u8c61\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u9700\u8981\u5728class\u524d\u9762\u52a0\u4e0aabstract\u6765\u58f0\u660e\u3002\u9664\u4e86\u62bd\u8c61\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u58f0\u660e\u5176\u4ed6\u6210\u5458\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">\u4fee\u98fe\u5b50<\/span> <span class=\"kd\">abstract<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">\u30af\u30e9\u30b9\u540d<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"n\">\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u306e\u30e1\u30f3\u30d0<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8ba9\u6211\u4eec\u770b\u4e00\u4e9b\u62bd\u8c61\u7c7b\u548c\u5177\u4f53\u7c7b\u7684\u4f8b\u5b50\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">abstract<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Page<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getTitle<\/span><span class=\"o\">();<\/span>\r\n    \r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">printReview<\/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\">\"title : \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">getTitle<\/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\">\"review : It was really great story.\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">ReviewPage<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Page<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nd\">@Override<\/span> \r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getTitle<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"s\">\"The Story Of Qiita\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><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    <span class=\"nc\">ReviewPage<\/span> <span class=\"n\">page<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">New<\/span> <span class=\"nf\">ReviewPage<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">page<\/span><span class=\"o\">.<\/span><span class=\"na\">printReview<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>title : The Story Of Qiita\r\nreview : It was really great story.\r\n<\/code><\/pre>\n<h1>\u6784\u9020\u51fd\u6570<br \/>\n\u65e0\u8bba\u662f\u7ee7\u627f\u5177\u8c61\u7c7b\u8fd8\u662f\u62bd\u8c61\u7c7b\uff0c\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\u90fd\u4e0d\u4f1a\u88ab\u5b50\u7c7b\u7ee7\u627f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">price<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Item<\/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\">price<\/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\">price<\/span> <span class=\"o\">=<\/span> <span class=\"n\">price<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Book<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u30e1\u30f3\u30d0\u3092\u5ba3\u8a00\u3057\u3066\u3044\u306a\u3044<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><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    <span class=\"c1\">\/\/ Book book = new Book(\"Qiita\u653b\u7565\", 1000);  \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5b50\u7c7b\u7684\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7super(\u53c2\u6570\u5217\u8868)\u6765\u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Book<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Item<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Book<\/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\">price<\/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\">price<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ \u89aa\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3073\u51fa\u3059<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><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    <span class=\"nc\">Book<\/span> <span class=\"n\">book<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Book<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Qiita\u653b\u7565\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">1000<\/span><span class=\"o\">);<\/span>  <span class=\"c1\">\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306f\u8d77\u3053\u3089\u306a\u3044<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5b50\u7c7b\u7684\u6784\u9020\u51fd\u6570\u4f1a\u9690\u5f0f\u5730\u8c03\u7528\u7236\u7c7b\u7684\u65e0\u53c2\u6784\u9020\u51fd\u6570\u3002\u4f46\u5982\u679c\u7236\u7c7b\u53ea\u58f0\u660e\u4e86\u4e00\u4e2a\u6216\u591a\u4e2a\u5e26\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5219\u9700\u8981\u663e\u5f0f\u5730\u8c03\u7528\u3002<\/p>\n<h1>\u7ee7\u627f\u4e86\u7c7b\u7684\u5b9e\u4f8b\u53ef\u4ee5\u5c06\u5b50\u7c7b\u7684\u5b9e\u4f8b\u8d4b\u503c\u7ed9\u7236\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\u3002<br \/>\n\u203b\u53cd\u4e4b\u4e0d\u6210\u7acb\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">Item<\/span> <span class=\"n\">book<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Book<\/span><span class=\"o\">();<\/span>\r\n<span class=\"nc\">Page<\/span> <span class=\"n\">page<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ReviewPage<\/span><span class=\"o\">();<\/span>\r\n<\/code><\/pre>\n<p>\u5f53\u5c06\u5b50\u7c7b\u7684\u5b9e\u4f8b\u8d4b\u503c\u7ed9\u7236\u7c7b\u7c7b\u578b\u7684\u53d8\u91cf\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u8c03\u7528\u7684\u65b9\u6cd5\u548c\u8c03\u7528\u7ed3\u679c\u3002\u8fd9\u662f\u56e0\u4e3a\uff0c\u5728\u7f16\u8bd1\u65f6\u548c\u8fd0\u884c\u65f6\uff0c\u5f15\u7528\u7684\u7c7b\u578b\u662f\u4e0d\u540c\u7684\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\uff1a\u5909\u6570\u306e\u578b\u3092\u53c2\u7167\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u304c\u5b9f\u884c\u3067\u304d\u308b\u304b\u304c\u6c7a\u307e\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5b9f\u884c\u6642\uff1a\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u578b\u3092\u53c2\u7167\u3057\u3001\u30e1\u30bd\u30c3\u30c9\u306e\u5b9f\u884c\u5185\u5bb9\u304c\u6c7a\u307e\u308b<\/ul>\n<h1>\u603b\u7ed3\u5f00\u59cb\u65f6\uff0c\u5e0c\u671b\u80fd\u591f\u5728\u73ed\u7ea7\u4e2d\u5efa\u7acb\u8d77\u4e00\u79cd\u4eb2\u5b50\u5173\u7cfb\uff0c\u5e76\u4e14\u80fd\u591f\u8fdb\u884c\u66f4\u65b0\u3002\u867d\u7136\u6709\u4e00\u4e9b\u5177\u4f53\u7684\u9650\u5236\uff0c\u4f46\u6211\u4eec\u53ef\u4ee5\u9010\u6e10\u8bb0\u4f4f\u5b83\u4eec\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148\u6700\u8fd1\u6211\u53c3\u52a0\u4e86Java\u57fa\u790e\u7684\u57f9\u8a13\u3002\u96d6\u7136\u5728\u5b78\u751f\u6642\u671f\u4e0a\u904eJava\u8ab2\u7a0b\uff0c\u6709\u4e00\u4e9b\u57fa\u790e\u5df2\u7d93\u638c\u63e1\uff0c\u4f46\u4e5f\u6709\u4e9b\u5fd8\u8a18\u4e86\uff0c\u6240\u4ee5\u6211 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31316","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010Java\u57fa\u7840\u3011\u7ee7\u627f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Java\u57fa\u7840\u3011\u7ee7\u627f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u57fa\u7840\u3011\u7ee7\u627f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u57fa\u7840\u3011\u7ee7\u627f\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010Java\u57fa\u7840\u3011\u7ee7\u627f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u57fa\u7840\u3011\u7ee7\u627f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-12T01:13:14+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T15:24:44+00:00\" \/>\n<meta name=\"author\" content=\"\u97f5, \u79d1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u97f5, \u79d1\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" 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