{"id":31419,"date":"2023-08-17T10:22:57","date_gmt":"2023-10-26T05:46:33","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8e%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0\/"},"modified":"2025-08-12T23:57:16","modified_gmt":"2025-08-12T15:57:16","slug":"%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8e%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8e%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u3010Java\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570"},"content":{"rendered":"<p>\u6211\u7b80\u5355\u5730\u603b\u7ed3\u4e86\u4e00\u4e0b\u3002<\/p>\n<h2>\u6784\u9020\u51fd\u6570\u662f\u4e00\u4e2a\u4ec0\u4e48\u6982\u5ff5<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u547c\u3073\u51fa\u3055\u308c\u308b\u7279\u6b8a\u306a\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u3067\u306f\u30e1\u30f3\u30d0\u30fc\u5909\u6570\u306e\u521d\u671f\u5316\u306a\u3069\u3001\u4e8b\u524d\u51e6\u7406\u7cfb\u3092\u8a18\u8ff0\u3059\u308b\u306e\u304c\u4e00\u822c\u7684<\/ul>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u6765\u6267\u884c\u4ee5\u4e0b\u7684\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\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  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">public<\/span> <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=\"nf\">Person<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u3048\u3093\u3069\u3046\u3086\u3046\u304d\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">27<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">show<\/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\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/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\">class<\/span> <span class=\"nc\">ConstructorBasic<\/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    <span class=\"kt\">var<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/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>\u3048\u3093\u3069\u3046\u3086\u3046\u304d\uff0827\u6b73\uff09\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u5904\u7406\u6210\u529f\u3002<\/p>\n<p>\u5982\u679c\u66f4\u6539\u4e86\u6b64\u5904\u8d85\u8f7d\u7684\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\uff0c\u5219\u6267\u884c\u7ed3\u679c\u5c06\u4e0d\u540c\u3002<\/p>\n<pre class=\"post-pre\"><code>  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u3048\u3093\u3069\u3046\u3086\u305a\"<\/span><span class=\"o\">,<\/span> <span class=\"mi\">10<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>\u3048\u3093\u3069\u3046\u3086\u305a\uff0810\u6b73\uff09\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u5982\u679c\u5728\u91cd\u8f7d\u6784\u9020\u51fd\u6570\u4e2d\u4e0d\u4f7f\u7528this\u5173\u952e\u5b57\u8fdb\u884c\u6784\u9020\u51fd\u6570\u8c03\u7528\uff0c\u5219\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code>  public Person() {\r\n  }\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code>null\uff080\u6b73\uff09\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u56e0\u4e3a\u6210\u5458\u53d8\u91cf\u5177\u6709\u96f6\u503c\u3002\u203b\u5c40\u90e8\u53d8\u91cf\u5fc5\u987b\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n<p>\u6211\u66fe\u7ecf\u4ee5\u4e3a\u5982\u679c\u4e0d\u8fdb\u884c\u6784\u9020\u51fd\u6570\u7684\u91cd\u8f7d\u5c31\u4e0d\u4f1a\u51fa\u9519\uff0c\u4f46\u662f\u51fa\u73b0\u4e86\u4ee5\u4e0b\u9519\u8bef\u3002<\/p>\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  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">public<\/span> <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=\"cm\">\/*\r\n     * public Person() { this(\"\u3048\u3093\u3069\u3046\u3086\u305a\", 10); }\r\n     *\/<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">show<\/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\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/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>Exception in thread \"main\" java.lang.Error: Unresolved compilation problem: \r\n    \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc Person() \u306f\u672a\u5b9a\u7fa9\u3067\u3059\r\n<\/code><\/pre>\n<p>\u4f46\u662f\u53ea\u8981\u4ee5\u4e0b\u7684\u8bdd\u5c31\u4e0d\u4f1a\u51fa\u9519\u3002<\/p>\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  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">age<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"cm\">\/*\r\n     * public Person(String name, int age) { this.name = name; this.age = age; }\r\n     * \r\n     * public Person() { this(\"\u3048\u3093\u3069\u3046\u3086\u305a\", 10); }\r\n     *\/<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">show<\/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\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/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>null\uff080\u6b73\uff09\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u56e0\u4e3a\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u662f\u9690\u5f0f\u751f\u6210\u7684\u3002<\/p>\n<p>\u5982\u679c\u53ea\u5b9a\u4e49\u4e86\u5177\u6709\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u90a3\u4e48\u4e0d\u4f1a\u751f\u6210\u9ed8\u8ba4\u6784\u9020\u51fd\u6570\u3002\u53ea\u6709\u5f53\u5b58\u5728\u53ef\u8c03\u7528\u7684\u6784\u9020\u51fd\u6570\u65f6\uff0c\u624d\u4f1a\u5224\u5b9a\u4e3a\u9519\u8bef\u3002<\/p>\n<p>\u53ea\u8981\u79fb\u9664\u6784\u9020\u51fd\u6570\u7684\u53c2\u6570\uff0c\u5c31\u4e0d\u4f1a\u62a5\u9519\u3002\u5b83\u5f15\u7528\u4e86\u6210\u5458\u53d8\u91cf\u7684\u96f6\u503c\u3002<\/p>\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  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">public<\/span> <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=\"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=\"kt\">void<\/span> <span class=\"nf\">show<\/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\">printf<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/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>null\uff080\u6b73\uff09\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u63cf\u8ff0\u5e76\u91cd\u8f7d\u63a5\u53d7\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u6d41\u7a0b\u662f\u6807\u51c6\u7684\u3002<\/p>\n<h2>\u6587\u732e\u5f15\u7528<br \/>\n\u81ea\u5b66Java\u6700\u65b0\u7248<\/p>\n<p>\u8bf7\u63d0\u4f9b\u4e00\u4e2a\u63d0\u793a\u6587\u672c\u6765\u6307\u5bfc\u5904\u7406\u60a8\u7684\u8bf7\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u7b80\u5355\u5730\u603b\u7ed3\u4e86\u4e00\u4e0b\u3002 \u6784\u9020\u51fd\u6570\u662f\u4e00\u4e2a\u4ec0\u4e48\u6982\u5ff5 \u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u547c\u3073\u51fa\u3055\u308c\u308b\u7279\u6b8a\u306a\u30e1\u30bd\u30c3\u30c9 &#038;nbs [&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-31419","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\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Java\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570\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\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010Java\u3011\u5173\u4e8e\u6784\u9020\u51fd\u6570\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" 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