{"id":31523,"date":"2023-02-23T11:41:54","date_gmt":"2023-01-02T22:09:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91class%e6%98%af%e4%bb%80%e4%b9%88\/"},"modified":"2024-04-29T15:55:02","modified_gmt":"2024-04-29T07:55:02","slug":"%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91class%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e5%9f%ba%e7%a1%80%e3%80%91class%e6%98%af%e4%bb%80%e4%b9%88\/","title":{"rendered":"\u3010Java\u57fa\u7840\u3011Class\u662f\u4ec0\u4e48"},"content":{"rendered":"<h2>\u9996\u5148<\/h2>\n<p>\u6211\u5199\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e3a\u4e86\u6574\u7406\u6211\u5728\u300a\u7b80\u6613Java\u300b\u8fd9\u672c\u53c2\u8003\u4e66\u4e2d\u81ea\u5b66\u6240\u638c\u63e1\u7684\u77e5\u8bc6\u3002<\/p>\n<h2>\u73ed\u7ea7\u7684\u610f\u601d\u662f<\/h2>\n<p>\u6c47\u603b\u4e86\u7269\u4f53\u7684\u72b6\u6001\u3001\u7279\u6027\u548c\u529f\u80fd\u7684\u5185\u5bb9<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">field\uff1a\u30af\u30e9\u30b9\u306e\u300c\u72b6\u614b\u30fb\u6027\u8cea\u300d\u3092\u8868\u3059\u4ed5\u7d44\u307f<\/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\">method\uff1a\u30af\u30e9\u30b9\u306e\u300c\u6a5f\u80fd\u300d\u3092\u8868\u3059\u4ed5\u7d44\u307f<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">member\uff1a field\u3001method&#8230;etc\u306e\u3053\u3068<\/ul>\n<h2>\u5ba3\u8a00\u8bfe\u7684\u58f0\u660e<\/h2>\n<p>\u4ee5\u4e0b\u662f\u5982\u4f55\u58f0\u660e\u4e00\u4e2a\u7c7b\u3002<\/p>\n<pre class=\"post-pre\"><code>class \u30af\u30e9\u30b9\u540d\r\n{\r\n    \u578b\u540d \u30d5\u30a3\u30fc\u30eb\u30c9\u540d;\r\n    \u30fb\u30fb\u30fb\r\n    \u623b\u308a\u5024\u306e\u578b \u30e1\u30bd\u30c3\u30c9\u540d(\u5f15\u6570\u30ea\u30b9\u30c8)\r\n    {\r\n\u3000\u3000\u3000\u3000\u6587;\r\n\u3000\u3000\u3000\u3000\u30fb\u30fb\u30fb\r\n\u3000\u3000\u3000\u3000return \u5f0f;\r\n    }\r\n    \u30fb\u30fb\u30fb\r\n}\r\n<\/code><\/pre>\n<h2>\u4f7f\u7528\u8bfe\u7a0b<\/h2>\n<p>\u53ea\u58f0\u660e\u4e00\u4e2a\u7c7b\u5e76\u4e0d\u80fd\u8be6\u7ec6\u4e86\u89e3\u5b83\u662f\u4ec0\u4e48\u6837\u7684\u4e1c\u897f\u3002<br \/>\n\u6240\u4ee5\u9700\u8981\u7684\u662f\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u201c\u8f66\u201d\u6765\u66ff\u4ee3\u5e76\u601d\u8003\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u8eca\u30af\u30e9\u30b9<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Car<\/span>\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u30d5\u30a3\u30fc\u30eb\u30c9<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">num<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u8eca\u306e\u30ca\u30f3\u30d0\u30fc<\/span>\r\n    <span class=\"kt\">double<\/span> <span class=\"n\">gas<\/span><span class=\"o\">;<\/span> <span class=\"c1\">\/\/ \u30ac\u30bd\u30ea\u30f3\u306e\u91cf<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u9636\u6bb5\uff0c\u6211\u4eec\u53ef\u4ee5\u77e5\u9053\u201c\u8f66\u201d\u8fd9\u4e2a\u4e8b\u7269\u5177\u6709\u201c\u8f66\u724c\u53f7\u7801\u201d\u548c\u201c\u6c7d\u6cb9\u91cf\u201d\u3002<br \/>\n\u7136\u540e\uff0c\u53ea\u9700\u6839\u636e\u58f0\u660e\u7684\u7c7b\uff0c\u7f16\u5199\u4ee3\u7801\u6765\u521b\u5efa\u4e00\u8f86\u8f66\u3002<\/p>\n<ul class=\"post-ul\">\u3053\u306e\u3088\u3046\u306b\u3001\u30b3\u30fc\u30c9\u4e0a\u3067\u4f5c\u6210\u3055\u308c\u308b\u8eca\uff11\u53f0\uff11\u53f0\u306e\u3053\u3068\u3092\u3001object\/instance\u3068\u3044\u3044\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u8eca\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210<\/span>\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Sample1<\/span>\r\n<span class=\"o\">{<\/span>\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>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Car<\/span> <span class=\"n\">car1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Car<\/span><span class=\"o\">();<\/span>\r\n\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1234<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">20.5<\/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=\"s\">\"\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3068\u3001\u30e1\u30f3\u30d0\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/ul>\n<p>\u8981\u4f7f\u7528\u7c7b\uff0c\u9700\u8981\u5148\u58f0\u660e\u7c7b\u5e76\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n<h2>\u6784\u9020\u51fd\u6570<\/h2>\n<p>\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u9664\u4e86\u5b57\u6bb5\u548c\u65b9\u6cd5\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u7f16\u5199\u6784\u9020\u51fd\u6570\u3002<\/p>\n<p>\u6784\u9020\u51fd\u6570\u548c\u65b9\u6cd5\u975e\u5e38\u76f8\u4f3c\uff0c<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u540d\u524d\u306f\u3001\u5fc5\u305a\u30af\u30e9\u30b9\u540d\u3068\u540c\u3058<\/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\">\u623b\u308a\u5024\u3092\u6307\u5b9a\u3067\u304d\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u305d\u306e\u30af\u30e9\u30b9\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u4f5c\u6210\u3055\u308c\u305f\u3068\u304d\u306b\u3001\u5b9a\u7fa9\u3057\u3066\u304a\u3044\u305f\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u306e\u51e6\u7406\u304c\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u308b<\/ul>\n<p>\u6709\u5404\u79cd\u4e0d\u540c\u4e4b\u5904\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Car<\/span>\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">num<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">gas<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"c1\">\/\/ constructor<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Car<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">0.0<\/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\">\"\u8eca\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\"<\/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>\r\n    <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\">\"\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Sample<\/span>\r\n<span class=\"o\">{<\/span>\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>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Car<\/span> <span class=\"n\">car1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Car<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">car1<\/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<p>\u4ee5\u4e0b\u662f\u6267\u884c\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code>\u8eca\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\r\n\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f0\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u306f0.0\u3067\u3059\u3002\r\n<\/code><\/pre>\n<h2>\u73ed\u7ea7\u7684\u529f\u80fd<\/h2>\n<h3>\u5c01\u88c5<\/h3>\n<p>\u5c06\u6570\u636e\uff08\u5b57\u6bb5\uff09\u548c\u529f\u80fd\uff08\u65b9\u6cd5\uff09\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u5c01\u88c5\u5728\u7c7b\u4e2d\uff0c\u5e76\u901a\u8fc7\u5728\u60f3\u4fdd\u62a4\u7684\u6210\u5458\u4e0a\u6dfb\u52a0private\u5173\u952e\u5b57\uff0c\u963b\u6b62\u5176\u88ab\u968f\u610f\u8bbf\u95ee\u7684\u529f\u80fd\u3002<\/p>\n<p>\u4f8b\uff09Field\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u2192Private member\uff08\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u30e1\u30f3\u30d0\u30fc\uff09\u3001Method\uff08\u30e1\u30bd\u30c3\u30c9\uff09\u2192Public member\uff08\u30d1\u30d6\u30ea\u30c3\u30af\u30e1\u30f3\u30d0\u30fc\uff09<\/p>\n<p>\u901a\u8fc7\u8fd9\u6837\u505a\uff0c\u53ef\u4ee5\u521b\u5efa\u51fa\u4e0d\u6613\u51fa\u9519\u7684\u7a0b\u5e8f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">public\uff1a\u30af\u30e9\u30b9\u306e\u5916\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/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\">private\uff1a\u30af\u30e9\u30b9\u306e\u5916\u304b\u3089\u52dd\u624b\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u3069\u3061\u3089\u3082\u304b\u304b\u306a\u3044\uff08\u7701\u7565\uff09\uff1a\u300c\u540c\u3058\u30d1\u30c3\u30b1\u30fc\u30b8\u300d\u306b\u542b\u307e\u308c\u308b\u30af\u30e9\u30b9\u5185\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/ul>\n<h3>\u8d85\u8f7d<\/h3>\n<p>\u5728\u540c\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u5b9a\u4e49\u5177\u6709\u76f8\u540c\u65b9\u6cd5\u540d\u79f0\u4f46\u5177\u6709\u4e0d\u540c\u53c2\u6570\u7c7b\u578b\u548c\u6570\u91cf\u7684\u65b9\u6cd5\u3002<br \/>\n\u203b\u6784\u9020\u51fd\u6570\u4e5f\u53ef\u4ee5\u8fdb\u884c\u91cd\u8f7d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Car<\/span>\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">num<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">gas<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">setCar<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">n<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"n\">n<\/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\">\"\u30ca\u30f3\u30d0\u30fc\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u3057\u307e\u3057\u305f\u3002\"<\/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\">setCar<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">g<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"n\">g<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u3057\u307e\u3057\u305f\u3002\"<\/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\">setCar<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">g<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"n\">n<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"n\">g<\/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\">\"\u30ca\u30f3\u30d0\u30fc\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u30ac\u30bd\u30ea\u30f3\u91cf\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u3057\u307e\u3057\u305f\u3002\"<\/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>\r\n    <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\">\"\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Sample<\/span>\r\n<span class=\"o\">{<\/span>\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>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">Car<\/span> <span class=\"n\">car1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Car<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">setCar<\/span><span class=\"o\">(<\/span><span class=\"mi\">1234<\/span><span class=\"o\">,<\/span> <span class=\"mf\">20.5<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/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=\"s\">\"\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u3060\u3051\u5909\u66f4\u3057\u307e\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">setCar<\/span><span class=\"o\">(<\/span><span class=\"mi\">2345<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/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=\"s\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u3060\u3051\u5909\u66f4\u3057\u307e\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">car1<\/span><span class=\"o\">.<\/span><span class=\"na\">setCar<\/span><span class=\"o\">(<\/span><span class=\"mf\">30.5<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">car1<\/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<p>\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code>\u30ca\u30f3\u30d0\u30fc\u30921234\u306b\u30ac\u30bd\u30ea\u30f3\u91cf\u309220.5\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f1234\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u306f20.5\u3067\u3059\u3002\r\n\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u3060\u3051\u5909\u66f4\u3057\u307e\u3059\u3002\r\n\u30ca\u30f3\u30d0\u30fc\u30922345\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f2345\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u306f20.5\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u3060\u3051\u5909\u66f4\u3057\u307e\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u309230.5\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f2345\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u306f30.5\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u8c03\u7528\u4e863\u79cd\u7c7b\u578b\u7684setCar()\u65b9\u6cd5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">1\u756a\u76ee\u306b\u3001\u5f15\u6570\u304c\uff12\u500b\u306e\u3082\u306e<\/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\">2\u756a\u76ee\u306b\u3001\u5f15\u6570\u304cint\u578b\u306e\u3082\u306e<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">3\u756a\u76ee\u306b\u3001\u5f15\u6570\u304cdouble\u578b\u306e\u3082\u306e<\/ul>\n<p>\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u6cd5\u540d\u79f0\u6765\u5904\u7406\u7c7b\u4f3c\u7684\u64cd\u4f5c\uff0c\u975e\u5e38\u65b9\u4fbf\u3002<br \/>\n\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u53c2\u6570\u7684\u7c7b\u578b\u6216\u6570\u91cf\u4e0d\u540c\uff0c\u5219\u65e0\u6cd5\u8fdb\u884c\u91cd\u8f7d\uff01<\/p>\n<h2>\u7ee7\u627f<\/h2>\n<p>\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u57fa\u4e8e\u5df2\u7ecf\u521b\u5efa\u7684\u7c7b\u6765\u521b\u5efa\u65b0\u7684\u7c7b\u3002<\/p>\n<ul class=\"post-ul\">\u65b0\u3057\u3044\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3092\u3001extends(\u30af\u30e9\u30b9\u3092\u62e1\u5f35\u3059\u308b)\u3068\u3044\u3046\u3002<\/ul>\n<p>\u4ee5\u6c7d\u8f66\u4e3a\u4f8b\uff0c\u5982\u4e0b\u6240\u793a\uff0c<\/p>\n<pre class=\"post-pre\"><code>class \u8eca\r\n{\r\n    \u30ca\u30f3\u30d0\u30fc;\r\n    \u30ac\u30bd\u30ea\u30f3\u91cf;\r\n    \u30ca\u30f3\u30d0\u30fc\u3068\u30ac\u30bd\u30ea\u30f3\u91cf\u3092\u8868\u793a\u3059\u308b\u6a5f\u80fd\r\n}\r\n\r\nclass \u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc extends \u8eca\r\n{\r\n    \u7af6\u6280\u7528\u30b3\u30fc\u30b9;\r\n    \u7af6\u6280\u7528\u30b3\u30fc\u30b9\u3092\u8868\u793a\u3059\u308b\u6a5f\u80fd;\r\n}\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u89aa\u5143\u306e\u30af\u30e9\u30b9\u300c\u8eca\u300d\u3092\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u8ffd\u52a0\u3057\u305f\u30af\u30e9\u30b9\u300c\u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc\u300d\u3092\u30b5\u30d6\u30af\u30e9\u30b9<\/ul>\n<p>\u5e0c\u671b\u5982\u6b64\uff0c\u5b50\u7c7b\u7ee7\u627f\u8d85\u7c7b\u7684\u6210\u5458\u3002<\/p>\n<p>\u6ce8\u610f\uff1a\u5728\u4e00\u4e2a\u5b50\u7c7b\u4e2d\u4e0d\u53ef\u4ee5\u7ee7\u627f\u591a\u4e2a\u8d85\u7c7b\u7684\u6210\u5458\u51fd\u6570\u3002<\/p>\n<h3>\u5bf9\u6210\u5458\u7684\u8bbf\u95ee<\/h3>\n<p>\u5728\u8d85\u7c7b\u7684\u79c1\u6709\u6210\u5458\u4e2d\uff0c\u5b50\u7c7b\u4e5f\u65e0\u6cd5\u8bbf\u95ee\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5728\u8d85\u7c7b\u4e2d\u53ef\u4ee5\u4f7f\u7528protected\u8fdb\u884c\u6307\u5b9a\u3002<\/p>\n<ul class=\"post-ul\">protected\uff1a\u30b5\u30d6\u30af\u30e9\u30b9\u306e\u307b\u304b\u3001\u540c\u3058\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u5c5e\u3059\u308b\u30af\u30e9\u30b9\u304b\u3089\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3002<\/ul>\n<h3>\u8986\u5199<\/h3>\n<p>\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u4e0e\u8d85\u7c7b\u5b8c\u5168\u76f8\u540c\u7684\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u7684\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">class<\/span> <span class=\"nc\">Car<\/span>\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">num<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kd\">protected<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">gas<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Car<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">0.0<\/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\">\"\u8eca\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">Car<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">g<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"n\">n<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"n\">g<\/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\">\"\u30ca\u30f3\u30d0\u30fc\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306e\u8eca\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\"<\/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\">setCar<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">n<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">g<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"n\">n<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">gas<\/span> <span class=\"o\">=<\/span> <span class=\"n\">g<\/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\">\"\u30ca\u30f3\u30d0\u30fc\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u30ac\u30bd\u30ea\u30f3\u91cf\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u3057\u307e\u3057\u305f\u3002\"<\/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>\r\n    <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\">\"\u8eca\u306e\u30ca\u30f3\u30d0\u30fc\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">RacingCar<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Car<\/span>\r\n<span class=\"o\">{<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">course<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"kd\">public<\/span> <span class=\"nf\">RacingCar_11<\/span><span class=\"o\">()<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">course<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/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\">\"\u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\"<\/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\">setCourse<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">c<\/span><span class=\"o\">)<\/span>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"n\">course<\/span> <span class=\"o\">=<\/span> <span class=\"n\">c<\/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\">\"\u30b3\u30fc\u30b9\u756a\u53f7\u3092\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">course<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u306b\u3057\u307e\u3057\u305f\u3002\"<\/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>\r\n    <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\">\"\u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc\u306e\u30ca\u30f3\u30d0\u30fc\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">num<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30ac\u30bd\u30ea\u30f3\u91cf\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">gas<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/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\">\"\u30b3\u30fc\u30b9\u756a\u53f7\u306f\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">course<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\"\u3067\u3059\u3002\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n\r\n<span class=\"kd\">class<\/span> <span class=\"nc\">Sample<\/span>\r\n<span class=\"o\">{<\/span>\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>\r\n    <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">RacingCar<\/span> <span class=\"n\">rccar1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">RacingCar<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"n\">rccar1<\/span><span class=\"o\">.<\/span><span class=\"na\">setCar<\/span><span class=\"o\">(<\/span><span class=\"mi\">1234<\/span><span class=\"o\">,<\/span> <span class=\"mf\">20.5<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">rccar1<\/span><span class=\"o\">.<\/span><span class=\"na\">setCourse<\/span><span class=\"o\">(<\/span><span class=\"mi\">5<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"n\">rccar1<\/span><span class=\"o\">.<\/span><span class=\"na\">newShow<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u6267\u884c\u7ed3\u679c<\/p>\n<pre class=\"post-pre\"><code>\u8eca\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\r\n\u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002\r\n\u30ca\u30f3\u30d0\u30fc\u30921234\u306b\u30ac\u30bd\u30ea\u30f3\u91cf\u309220.5\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u30b3\u30fc\u30b9\u756a\u53f7\u30925\u306b\u3057\u307e\u3057\u305f\u3002\r\n\u30ec\u30fc\u30b7\u30f3\u30b0\u30ab\u30fc\u306e\u30ca\u30f3\u30d0\u30fc\u306f1234\u3067\u3059\u3002\r\n\u30ac\u30bd\u30ea\u30f3\u91cf\u306f20.5\u3067\u3059\u3002\r\n\u30b3\u30fc\u30b9\u756a\u53f7\u306f5\u3067\u3059\u3002\r\n<\/code><\/pre>\n<p>\u521b\u5efa\u5b50\u7c7b\u5bf9\u8c61\u5e76\u8c03\u7528show()\u65b9\u6cd5\u65f6\uff0c\u5b50\u7c7b\u7684show()\u65b9\u6cd5\u88ab\u8c03\u7528\u3002<\/p>\n<p>\u5982\u679c\u5b50\u7c7b\u4e2d\u6709\u4e00\u4e2a\u5168\u540d\u3001\u53c2\u6570\u6570\u91cf\u548c\u7c7b\u578b\u90fd\u5b8c\u5168\u76f8\u540c\u7684\u65b9\u6cd5\uff0c\u90a3\u4e48\u4f3c\u4e4e\u4f1a\u8c03\u7528\u5b50\u7c7b\u4e2d\u65b0\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002<\/p>\n<h3>\u6700\u7ec8<\/h3>\n<p>\u5728\u8d85\u7c7b\u65b9\u6cd5\u7684\u5f00\u5934\u52a0\u4e0afinal\u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u907f\u514d\u8fdb\u884c\u8986\u5199\u3002<\/p>\n<h2>\u8bf7\u53c2\u9605<\/h2>\n<ul class=\"post-ul\">\u3084\u3055\u3057\u3044Java<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u5199\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e3a\u4e86\u6574\u7406\u6211\u5728\u300a\u7b80\u6613Java\u300b\u8fd9\u672c\u53c2\u8003\u4e66\u4e2d\u81ea\u5b66\u6240\u638c\u63e1\u7684\u77e5\u8bc6\u3002 \u73ed\u7ea7\u7684\u610f\u601d\u662f \u6c47\u603b\u4e86\u7269\u4f53\u7684\u72b6\u6001 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31523","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\/ -->\n<title>\u3010Java\u57fa\u7840\u3011Class\u662f\u4ec0\u4e48 - Blog - Silicon Cloud<\/title>\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\u3011class\u662f\u4ec0\u4e48\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u57fa\u7840\u3011Class\u662f\u4ec0\u4e48\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u6211\u5199\u8fd9\u7bc7\u6587\u7ae0\u662f\u4e3a\u4e86\u6574\u7406\u6211\u5728\u300a\u7b80\u6613Java\u300b\u8fd9\u672c\u53c2\u8003\u4e66\u4e2d\u81ea\u5b66\u6240\u638c\u63e1\u7684\u77e5\u8bc6\u3002 \u73ed\u7ea7\u7684\u610f\u601d\u662f \u6c47\u603b\u4e86\u7269\u4f53\u7684\u72b6\u6001 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u57fa\u7840\u3011class\u662f\u4ec0\u4e48\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-02T22:09:57+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T07:55:02+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u626c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u626c\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" 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