{"id":31481,"date":"2022-12-03T02:01:51","date_gmt":"2024-02-16T19:29:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e7%bb%a7%e6%89%bf%ef%bc%88inheritance%ef%bc%89%e7%9a%84%e6%84%8f%e6%80%9d%e6%98%af%e9%80%9a%e8%bf%87%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%96%b0%e7%b1%bb%ef%bc%8c%e4%bb%8e\/"},"modified":"2024-04-29T03:32:26","modified_gmt":"2024-04-28T19:32:26","slug":"%e3%80%90java%e3%80%91%e7%bb%a7%e6%89%bf%ef%bc%88inheritance%ef%bc%89%e7%9a%84%e6%84%8f%e6%80%9d%e6%98%af%e9%80%9a%e8%bf%87%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%96%b0%e7%b1%bb%ef%bc%8c%e4%bb%8e","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e7%bb%a7%e6%89%bf%ef%bc%88inheritance%ef%bc%89%e7%9a%84%e6%84%8f%e6%80%9d%e6%98%af%e9%80%9a%e8%bf%87%e5%88%9b%e5%bb%ba%e4%b8%80%e4%b8%aa%e6%96%b0%e7%b1%bb%ef%bc%8c%e4%bb%8e\/","title":{"rendered":"\u3010Java\u3011\u7ee7\u627f\uff08Inheritance\uff09\u7684\u610f\u601d\u662f\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u65b0\u7c7b\uff0c\u4ece\u73b0\u6709\u7684\u7c7b\u4e2d\u7ee7\u627f\u5c5e\u6027\u548c\u65b9\u6cd5"},"content":{"rendered":"<h1>\u7ee7\u627f\u7684\u610f\u601d\u662f<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5143\u306b\u306a\u308b\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u5f15\u304d\u7d99\u304e\u3001\u65b0\u305f\u306a\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\uff08\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3001\u89aa\u30af\u30e9\u30b9\uff09\uff1a\u7d99\u627f\u5143<\/p>\n<p>\u6d3e\u751f\u30af\u30e9\u30b9\uff08\u30b5\u30d6\u30af\u30e9\u30b9\u3001\u5b50\u30af\u30e9\u30b9\uff09\uff1a\u7d99\u627f\u3057\u3066\u3067\u304d\u305f\u30af\u30e9\u30b9<br \/>\n\u6a5f\u80fd\u306e\u5171\u901a\u3057\u305f\u90e8\u5206\u3092\u5207\u308a\u51fa\u3057\u3066\u5dee\u5206\u3060\u3051\u3092\u66f8\u304f\u4ed5\u7d44\u307f<br \/>\ncf: \u59d4\u8b72\uff1a\u7279\u5b9a\u306e\u5f79\u5272\u3092\u5225\u306e\u30af\u30e9\u30b9\u3068\u3057\u3066\u5207\u308a\u51fa\u3057\u305d\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u4fdd\u5b58<\/p>\n<h1>\u7ee7\u627f\u7684\u7528\u6cd5<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">class \u6d3e\u751f\u30af\u30e9\u30b9 extends \u57fa\u5e95\u30af\u30e9\u30b9{}<\/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\">extends\u7701\u7565\u3059\u308b\u3068Object\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u3053\u3068\u306b\u306a\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\">\u73fe\u5728\u306e\u30af\u30e9\u30b9\u3067\u8981\u6c42\u3055\u308c\u305f\u30e1\u30f3\u30d0\u30fc\u3092\u691c\u7d22\u3057\u3001\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u4e0a\u4f4d\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30e1\u30f3\u30d0\u30fc\u3092\u547c\u3073\u51fa\u3059\uff01<\/ul>\n<\/li>\n<\/ul>\n<p>\u57fa\u5e95\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u4e21\u65b9\u306b\u3042\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3092\u512a\u5148\u3057\u3066\u547c\u3076<\/p>\n<p>\u6ce8\u610f\uff1a<\/p>\n<p>Java\u3067\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306f1\u500b\u3060\u3051\uff08\u591a\u91cd\u7d99\u627f\u8a8d\u4e0d\u53ef\uff09<br \/>\n\u57fa\u5e95\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30e1\u30f3\u30d0\u30fc\u3092\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u524a\u9664\u3067\u304d\u306a\u3044<br \/>\n=\u6d3e\u751f\u30af\u30e9\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u5168\u6027\u8cea\u3092\u542b\u3080<\/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=\"nc\">String<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\"<\/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=\"c1\">\/\/Person\u3092\u7d99\u627f\u3057\u305fBusinessPerson\u30af\u30e9\u30b9\u4f5c\u6210<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">BusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"c1\">\/\/\u6d3e\u751f\u30af\u30e9\u30b9\u72ec\u81ea\u306ework\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">work<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%d\u6b73\u306e%s\u306f\u4eca\u65e5\u3082\u5143\u6c17\u306b\u50cd\u304d\u307e\u3059\u3002\"<\/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=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/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\">InheritBasic<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/BusinessPerson\u306e\u307f\u547c\u3073\u51fa\u3059<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">bp<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u4f50\u85e4\u4e00\u90ce\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"c1\">\/\/show\u30e1\u30bd\u30c3\u30c9\u304cbp\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u306e\u3088\u3046\u306b\u547c\u3079\u308b\uff01<\/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\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/\u4f50\u85e4\u4e00\u90ce\uff0830\u6b73\uff09\u3067\u3059\u3002<\/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\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">work<\/span><span class=\"o\">());<\/span>  <span class=\"c1\">\/\/30\u6b73\u306e\u4f50\u85e4\u4e00\u90ce\u306f\u4eca\u65e5\u3082\u5143\u6c17\u306b\u50cd\u304d\u307e\u3059\u3002<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30dd\u30a4\u30f3\u30c8<\/ul>\n<\/li>\n<\/ul>\n<p>\u89aa\u30af\u30e9\u30b9\u3068\u5b50\u30af\u30e9\u30b9\u306bis-a\u306e\u95a2\u4fc2\u304c\u3042\u308c\u3070\u7d99\u627f\u3092\u3064\u304b\u3046<\/p>\n<p>is-a\uff1aSubClass is a SuperClass<\/p>\n<p>Person\u2283BusinessPerson<br \/>\nBusinessPerson\u304cPerson\u306b\u5168\u3066\u542b\u307e\u308c\u308b\u95a2\u4fc2<\/p>\n<p>\u6d3e\u751f\u30af\u30e9\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u7279\u5316<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u6c4e\u5316<\/p>\n<h1>\u573a\u5730\u7684\u9690\u85cf<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u7d99\u627f\u3067\u306f\u30e1\u30f3\u30d0\u30fc\u306b\u3088\u3063\u3066\u5909\u66f4\u53ef\u5426\u304c\u7570\u306a\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\uff1a\u30e1\u30bd\u30c3\u30c9\u304c\u53ef\u80fd<\/p>\n<p>\u96a0\u853d\uff1a\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u5165\u308c\u5b50\u30af\u30e9\u30b9\/\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u304c\u53ef\u80fd<\/p>\n<h2>\u9690\u533f<\/h2>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u540c\u540d\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3057\u305f\u5834\u5408\u3001\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304c\u898b\u3048\u306a\u304f\u306a\u308b<br \/>\n\u30c7\u30fc\u30bf\u578b\u304c\u7570\u306a\u3063\u3066\u3082\u540d\u524d\u304c\u540c\u3058\u306a\u3089\u96a0\u853d\u3055\u308c\u308b<\/p>\n<p>\u4e88\u7d04\u5909\u6570super\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u96a0\u853d\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<br \/>\n\u6ce8\u610f\uff1a\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u304cprivate\u3067\u306f\u30a2\u30af\u30bb\u30b9\u4e0d\u53ef\u80fd<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.time.ZonedDateTime<\/span><span class=\"o\">;<\/span>\r\n<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=\"nc\">ZonedDateTime<\/span> <span class=\"n\">birth<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">ZonedDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.time.LocalDateTime<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">BusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"c1\">\/\/\u57fa\u5e95\u30af\u30e9\u30b9\u306ebirth\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u96a0\u853d<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">LocalDateTime<\/span> <span class=\"n\">birth<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">LocalDateTime<\/span><span class=\"o\">.<\/span><span class=\"na\">now<\/span><span class=\"o\">();<\/span>\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=\"c1\">\/\/\u96a0\u853d\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u30a2\u30af\u30bb\u30b9<\/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=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">birth<\/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\">HideBasic<\/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\">bp<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"c1\">\/\/BusinessPerson.birth\u3092\u8868\u793a<\/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\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">birth<\/span><span class=\"o\">);<\/span> \r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"c1\">\/\/Person.birth\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u8868\u793a<\/span>\r\n    <span class=\"nc\">Person<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/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\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">birth<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u65b9\u6cd5\u7684\u91cd\u5199<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u57fa\u5e95\u30af\u30e9\u30b9\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9\u3092\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u4e0a\u66f8\u304d\uff08\u518d\u5b9a\u7fa9\uff09<\/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\">\u898b\u308b\u306e\u306f\u540d\u524d\u306e\u307f\u3067\u306f\u306a\u3044\uff08\u96a0\u853d\u3068\u7570\u306a\u308b\uff09<\/ul>\n<\/li>\n<\/ul>\n<p>\u30e1\u30bd\u30c3\u30c9\u540d\uff1a\u5b8c\u5168\u4e00\u81f4<\/p>\n<p>\u4eee\u5f15\u6570\uff1a\u30c7\u30fc\u30bf\u578b\/\u500b\u6570\u4e00\u81f4<\/p>\n<p>\u57fa\u5e95\u306e(CharSequence s)\u3092\u6d3e\u751f\u306e(String s)\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u4e0d\u53ef<\/p>\n<p>\u623b\u308a\u5024\uff1a\u578b\u4e00\u81f4\/\u6d3e\u751f\u578b<\/p>\n<p>\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\uff1a\u4e00\u81f4\/\u57fa\u5e95\u578b\u3088\u308a\u7de9\u3044<\/p>\n<p>public&gt;protected&gt;\u7121\u6307\u5b9a&gt;private<br \/>\nprivate\u306f\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u4e0d\u53ef<\/p>\n<p>throw\u53e5\uff08\u4f8b\u5916\uff09\uff1a\u4e00\u81f4\/\u6d3e\u751f\u578b<\/p>\n<p>\u2192@Override\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u3048\u3070OK<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u660e\u793a\u7684\u306b\u5ba3\u8a00<\/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=\"nc\">String<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\"<\/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\">BusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">BusinessPerson<\/span><span class=\"o\">()<\/span> <span class=\"o\">{}<\/span>\r\n  <span class=\"c1\">\/\/\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u540c\u540dshow\u30e1\u30bd\u30c3\u30c9\u3092\u4e0a\u66f8\u304d<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u4f1a\u793e\u54e1\u306e%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\"<\/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\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">work<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%d\u6b73\u306e%s\u306f\u4eca\u65e5\u3082\u5143\u6c17\u306b\u50cd\u304d\u307e\u3059\u3002\"<\/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=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u57fa\u7c7b\u5f15\u7528\uff08super\uff09<\/h1>\n<ul class=\"post-ul\">super\u306b\u3088\u308b\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u306e\u5148\u982d<\/ul>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/BusinessPerson\u30af\u30e9\u30b9\u3092\u7d99\u627f<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">EliteBusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">BusinessPerson<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nd\">@Override<\/span> \r\n  <span class=\"c1\">\/\/\u57fa\u5e95\u30af\u30e9\u30b9\u306ework\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3057\u3001\u72ec\u81ea\u306e\u51e6\u7406\u3092\u8ffd\u52a0\u3059\u308b<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">work<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u5148\u982d\u3067super\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">work<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\u3044\u3064\u3067\u3082\u7b11\u9854\u3067\uff01\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">result<\/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\">InheritBaseCall<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">ebp<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">EliteBusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">ebp<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u5c71\u7530\u592a\u90ce\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">ebp<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">35<\/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\">ebp<\/span><span class=\"o\">.<\/span><span class=\"na\">work<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/35\u6b73\u306e\u5c71\u7530\u592a\u90ce\u306f\u4eca\u65e5\u3082\u5143\u6c17\u306b\u50cd\u304d\u307e\u3059\u3002\u3044\u3064\u3067\u3082\u7b11\u9854\u3067\uff01<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u6d3e\u751f\u7c7b\u7684\u6784\u9020\u51fd\u6570<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u30fc\u306f\u30e1\u30bd\u30c3\u30c9\u3068\u540c\u3058\u3088\u3046\u306b\u306f\u5f15\u304d\u7d99\u304c\u308c\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\">\u7d99\u627f\u95a2\u4fc2\u306b\u3042\u308b\u30af\u30e9\u30b9\u3067\u306f\u4e0a\u4f4d\u30af\u30e9\u30b9\u304b\u3089\u9806\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3070\u308c\u3001\u6700\u7d42\u7684\u306b\u73fe\u5728\u306e\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3070\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u57fa\u672c\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u306f\u57fa\u672c\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<br \/>\n\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/p>\n<p>1.\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u898f\u5b9a\u5024\u3067\u521d\u671f\u5316<br \/>\n2.\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u30d6\u30ed\u30c3\u30af\u5b9f\u884c<br \/>\n3.\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u884c<br \/>\n4.\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u521d\u671f\u5316\u30d6\u30ed\u30c3\u30af\u5b9f\u884c<br \/>\n5.\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5b9f\u884c<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MyParent<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MyParent<\/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\">\"\u89aa\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<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MyChild<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">MyParent<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MyChild<\/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\">\"\u5b50\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<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">InheritConstruct<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">MyChild<\/span><span class=\"o\">();<\/span> <span class=\"c1\">\/\/\u89aa\u3067\u3059\u3002 \u5b50\u3067\u3059\u3002<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e0a\u4f4d\u30af\u30e9\u30b9\u3067\u6697\u9ed9\u7684\u306b\u547c\u3070\u308c\u308b\u306e\u306f\u5f15\u6570\u306a\u3057\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u307f<\/ul>\n<\/li>\n<\/ul>\n<p>\u660e\u793a\u7684\u306b\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u5b9a\u7fa9(=\u5f15\u6570\u4ed8\u304d)\u3057\u305f\u5834\u5408\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306f\u81ea\u52d5\u751f\u6210\u3055\u308c\u306a\u3044<br \/>\n\u2192\u5f15\u6570\u4ed8\u304d\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u3001\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304b\u3089super\u3067\u547c\u3076<\/p>\n<p>\u5fc5\u305a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306e\u5148\u982d\u6587\u3067\u547c\u3076<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u4e0a\u4f4d\u30af\u30e9\u30b9\uff08\u5f15\u6570\u4ed8\u304d\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\uff09<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">MyParent<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MyParent<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/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\u306e\u89aa\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">name<\/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\">MyChild<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">MyParent<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">MyChild<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">name<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304b\u3089\u4e0a\u4f4d\u30af\u30e9\u30b9\u306e\u5f15\u6570\u306a\u3057\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u547c\u3076<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">name<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"c1\">\/\/\u57fa\u5e95\u30af\u30e9\u30b9\u2192\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u9806\u3067\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u304c\u547c\u3070\u308c\u308b<\/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\">\"\u5b50\u306e%s\u3067\u3059\u3002\\n\"<\/span><span class=\"o\">,<\/span> <span class=\"n\">name<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/\u5c71\u7530\u592a\u90ce\u306e\u89aa\u3067\u3059\u3002\\n\u5c71\u7530\u592a\u90ce\u306e\u5b50\u3067\u3059\u3002<\/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\">InheritConstruct<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">c<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">MyChild<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5c71\u7530\u592a\u90ce\"<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u7981\u6b62\u7ee7\u627f\u6216\u8986\u76d6<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u7d99\u627f\u53ef\u80fd\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u3084\u4fee\u6b63\u306f\u6d3e\u751f\u30af\u30e9\u30b9\u3078\u306e\u5f71\u97ff\u3082\u8003\u616e\u3059\u308b\u3079\u304d<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u7d99\u627f\/\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3092\u60f3\u5b9a\u3057\u306a\u3044\u30af\u30e9\u30b9\/\u30e1\u30bd\u30c3\u30c9\u306e\u5834\u5408\u3001final\u4fee\u98fe\u5b50\u3067\u7981\u6b62\u3059\u308b<\/ul>\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=\"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  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">()<\/span> <span class=\"o\">{}<\/span>\r\n  <span class=\"c1\">\/\/show\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u7981\u6b62<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">show<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\"<\/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=\"c1\">\/\/BusinessPerson\u30af\u30e9\u30b9\u3092\u7d99\u627f\u7981\u6b62<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">final<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">BusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">intro<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"s\">\"\u4f1a\u793e\u54e1\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<h1>\u53c2\u8003\u7c7b\u578b\u7684\u7c7b\u578b\u8f6c\u6362<\/h1>\n<ul class=\"post-ul\">\u578b\u540c\u58eb\u304c\u7d99\u627f\/\u5b9f\u88c5\u306e\u95a2\u4fc2\u306b\u3042\u308b\u3053\u3068<\/ul>\n<h2>\u63d0\u5347\u8f6c\u6362<\/h2>\n<p>\u6d3e\u751f\u30af\u30e9\u30b9\u304b\u3089\u57fa\u5e95\u30af\u30e9\u30b9\u3078\u306e\u5909\u63db\u306e\u3053\u3068<\/p>\n<p>BusinessPerson\u578b\u3092Person\u578b\u306b\u5909\u63db<\/p>\n<p>\u6d3e\u751f\u30af\u30e9\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u3092\u5168\u90e8\u542b\u3093\u3067\u3044\u308b<br \/>\n\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306f\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3068\u3057\u3066\u5229\u7528\u53ef\u80fd<br \/>\n\u3053\u306e\u5834\u5408\u5909\u63db\u306e\u578b\u306fPerson\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u306fBusinessPerson\uff08\u5f8c\u8ff0\u306e \u5909\u6570\u306e\u578b\/\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b \u53c2\u8003\uff09<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">CastUp<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/BusinessPerson\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u57fa\u5e95\u30af\u30e9\u30b9Person\u578b\u306e\u5909\u6570\u306b\u4ee3\u5165\u3057\u3066\u5909\u63db<\/span>\r\n    <span class=\"nc\">Person<\/span> <span class=\"n\">bp<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u5c71\u7530\u592a\u90ce\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/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\">bp<\/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<h2>\u8bf7\u5c06\u300c\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8\u300d\u7ffb\u8bd1\u6210\u4e2d\u6587\u3002<\/h2>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u304b\u3089\u6d3e\u751f\u30af\u30e9\u30b9\u3078\u306e\u5909\u63db\u306e\u3053\u3068<\/p>\n<p>Person\u578b\u3092BusinessPerson\u578b\u306b\u5909\u63db<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u306f\u5e38\u306b\u6d3e\u751f\u30af\u30e9\u30b9\u3068\u3057\u3066\u632f\u308b\u821e\u3048\u306a\u3044<br \/>\n\u30ad\u30e3\u30b9\u30c8\u69cb\u6587\u3067\u660e\u793a\u7684\u306b\u578b\u5909\u63db\u304c\u5fc5\u8981<br \/>\nPerson p = new BusinessPerson();<br \/>\nBusinessPerson bp = (BusinessPerson)p;<\/p>\n<h1>\u53d8\u91cf\u7684\u7c7b\u578b\/\u5bf9\u8c61\u7684\u7c7b\u578b<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Person\u30af\u30e9\u30b9\u306eshow\u30e1\u30bd\u30c3\u30c9\u3092BusinessPerson\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/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\">\u3057\u304b\u3057\u4ee5\u4e0b\u30b3\u30fc\u30c9\u3067\u306fBusinessPerson\u30af\u30e9\u30b9\u306ework\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3079\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>\u5909\u6570p\u306fPerson\u578b\u306e\u5909\u6570<\/p>\n<p>\u5909\u6570p\u304cwork\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u305b\u306a\u3044<\/p>\n<p>\u5909\u6570p\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\uff08\u5b9f\u4f53\uff09\u306fBusinessPerson<\/p>\n<p>BusinessPerson\u306eshow\u30e1\u30bd\u30c3\u30c9\u306f\u547c\u3073\u51fa\u3055\u308c\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">BusinessPerson<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Person<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">BusinessPerson<\/span><span class=\"o\">()<\/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\">show<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u4f1a\u793e\u54e1\u306e%s\uff08%d\u6b73\uff09\u3067\u3059\u3002\"<\/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\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">work<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%d\u6b73\u306e%s\u306f\u3001\u50cd\u304d\u307e\u3059\u3002\"<\/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=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/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\">TypeDifference<\/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=\"nc\">Person<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">name<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u5c71\u7530\u592a\u90ce\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"c1\">\/\/ System.out.println(p.work()); \/\/\u30a8\u30e9\u30fc<\/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\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/\u4f1a\u793e\u54e1\u306e\u5c71\u7530\u592a\u90ce\uff0830\u6b73\uff09\u3067\u3059\u3002<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u3064\u307e\u308a\u3001\u3001\u3001<\/ul>\n<\/li>\n<\/ul>\n<p>\u30ad\u30e3\u30b9\u30c8\u306f\u5909\u6570\u306e\u578b\u3092\u5dee\u3057\u66ff\u3048\u308b<\/p>\n<p>BusinessPerson\u5909\u6570\u578b\u3092Person\u5909\u6570\u578b\u306b\u5909\u63db<\/p>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\uff08\u5b9f\u4f53\uff09\u306f\u30ad\u30e3\u30b9\u30c8\u3057\u3066\u3082\u5909\u5316\u3057\u306a\u3044<\/p>\n<p>\u547c\u3073\u51fa\u3055\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u304c\u6c7a\u3081\u308b<\/p>\n<p>Person\u3067\u306fBusinessPerson\u306e\u632f\u308b\u821e\u3044\u304c\u3067\u304d\u306a\u3044<\/p>\n<h1>\u7c7b\u65b9\u6cd5\/\u5b57\u6bb5\u7684\u9690\u85cf<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9\u306f\u30af\u30e9\u30b9\u540d.\u30e1\u30bd\u30c3\u30c9\u540d(&#8230;)\u3067\u547c\u3076<\/ul>\n<\/li>\n<\/ul>\n<p>\u5909\u6570\u306e\u578b\/\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u304c\u5b58\u5728\u3057\u306a\u3044<br \/>\n\u5e38\u306b\u6307\u5b9a\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u308b\u306e\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u6982\u5ff5\u304c\u306a\u3044<\/p>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u9078\u629e\u306f\u5909\u6570\u306e\u578b\u3067\u6c7a\u307e\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HideBasic<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">bp<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/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\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">birth<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">show<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"c1\">\/\/\u5909\u6570p\u306fPerson\u578b<\/span>\r\n    <span class=\"nc\">Person<\/span> <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"c1\">\/\/Person\u30af\u30e9\u30b9\u306ebirth\u30d5\u30a3\u30fc\u30eb\u30c9\u306fZonedDateTime\u578b<\/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\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">birth<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/ZonedDateTime\u578b<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u5224\u65ad\u5f62\u72b6<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8\u6642\u306b\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u30c1\u30a7\u30c3\u30af\u304c\u5fc5\u8981<\/ul>\n<\/li>\n<\/ul>\n<p>\u4f8b\u3048\u3070\u3053\u3093\u306a\u3053\u3068\u304c\u3002\u3002\u3002<\/p>\n<p>BusinessPerson\/Student\u306fPerson\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u3042\u308b<\/p>\n<p>Person p = new BusinessPerson(); \/\/OK<\/p>\n<p>BusinessPerson bp = (BusinessPerson)p; \/\/OK<br \/>\nStudent st = (Student)p; \/\/NG<\/p>\n<p>\u5909\u6570p\u306e\u5b9f\u4f53(\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b)\u306fBusinessPerson<br \/>\n\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306fPerson\u3068BusinessPerson\/Student\u7d99\u627f\u95a2\u4fc2\u3057\u304b\u5206\u304b\u3089\u306a\u3044\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044\u304c\u3001\u5b9f\u884c\u6642\u306b\u30a8\u30e9\u30fc\u306b\u306a\u308b\uff01<\/p>\n<p>\u2192instanceof\u6f14\u7b97\u5b50\u3092\u4f7f\u3046<\/p>\n<p>\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u304c\u6307\u5b9a\u578b\u306b\u5909\u63db\u3067\u304d\u308b\u5834\u5408true<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u578b\u30c1\u30a7\u30c3\u30af<\/span>\r\n<span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nc\">Student<\/span><span class=\"o\">){<\/span>\r\n    <span class=\"nc\">Student<\/span> <span class=\"n\">st<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Student<\/span><span class=\"o\">)<\/span><span class=\"n\">p<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"c1\">\/\/\u6b63\u3057\u304f\u30ad\u30e3\u30b9\u30c8\u3067\u304d\u305f\u3068\u304d\u306e\u51e6\u7406<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u83b7\u5f97\u7c7b\u578b<\/h1>\n<p>getClass\u30e1\u30bd\u30c3\u30c9\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u3092\u53d6\u5f97<br \/>\n\u5909\u6570\u306e\u578b\u306b\u3088\u3089\u305a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u3092\u53d6\u5f97<\/p>\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    <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\">Person<\/span> <span class=\"n\">p1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/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\">p1<\/span><span class=\"o\">.<\/span><span class=\"na\">getClass<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/class Person<\/span>\r\n    <span class=\"nc\">Person<\/span> <span class=\"n\">p2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/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\">p2<\/span><span class=\"o\">.<\/span><span class=\"na\">getClass<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/class BusinessPerson<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h1>\u8ba9\u6e21<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u7d99\u627f\u306f\u57fa\u5e95\/\u6d3e\u751f\u30af\u30e9\u30b9\u304c\u5bc6\u7d50\u5408<\/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\">\u7d99\u627f\u3092\u4f7f\u3046\u30bf\u30a4\u30df\u30f3\u30b0<\/ul>\n<\/li>\n<\/ul>\n<p>\u57fa\u5e95\/\u6d3e\u751f\u30af\u30e9\u30b9\u304cis-a\u95a2\u4fc2<\/p>\n<p>\u30ea\u30d5\u30b3\u30d5\u306e\u7f6e\u63db\u539f\u5247\uff1a\u57fa\u5e95\u30af\u30e9\u30b9\u306e\u5909\u6570\u306b\u305d\u306e\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u4ee3\u5165\u3057\u3066\u3082\u30b3\u30fc\u30c9\u306e\u59a5\u5f53\u6027\u304c\u640d\u306a\u308f\u308c\u306a\u3044<\/p>\n<p>\u62e1\u5f35\u3092\u524d\u63d0\u3068\u3057\u3001\u305d\u306e\u65e8\u3092\u6587\u66f8\u5316\u3057\u3066\u3044\u308b<\/p>\n<p>\u7d99\u627f\u304c\u4e0d\u9069\u306a\u4f8b<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Random<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Roulette<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Random<\/span> <span class=\"o\">{<\/span>\r\n<span class=\"c1\">\/\/\u30eb\u30fc\u30ec\u30c3\u30c8\u4e0a\u9650<\/span>\r\n<span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">bound<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Roulette<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">bound<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">bound<\/span> <span class=\"o\">=<\/span> <span class=\"n\">bound<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/bound\u30d5\u30a3\u30fc\u30eb\u30c9\u4e0a\u9650\u3068\u3059\u308b\u5024\u3092\u53d6\u5f97\u3057\u4e71\u6570\u751f\u6210<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">nextInt<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nf\">nextInt<\/span><span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">bound<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u4ed6\u306e\u4e0d\u8981\u30e1\u30bd\u30c3\u30c9\u306f\u7121\u52b9\u5316\u3057\u3066\u3044\u308b\uff08\u30ea\u30d5\u30b3\u30d5\u306e\u7f6e\u63db\u539f\u5247\u306b\u53cd\u3059\u308b\uff09<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">nextBoolean<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">UnsupportedOperationException<\/span><span class=\"o\">();<\/span>\r\n  <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">long<\/span> <span class=\"nf\">nextLong<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">UnsupportedOperationException<\/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=\"kn\">import<\/span> <span class=\"nn\">java.util.Random<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">RouletteClient<\/span> <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> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">Random<\/span> <span class=\"n\">rou<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Roulette<\/span><span class=\"o\">(<\/span><span class=\"mi\">10<\/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\">rou<\/span><span class=\"o\">.<\/span><span class=\"na\">nextBoolean<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/UnsupportedOperationException<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u59d4\u8b72\u3067\u306f\u518d\u5229\u7528\u3057\u305f\u3044\u6a5f\u80fd\u3092\u3082\u3064\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u73fe\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3068\u3057\u3066\u53d6\u308a\u8fbc\u3080<\/p>\n<p>\u59d4\u8b72\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u540c\u58eb\u306e\u52d5\u7684\u306a\u95a2\u4fc2\u3067\u3042\u308b<\/p>\n<p>Roulette\u30af\u30e9\u30b9\u306erandom\u30d5\u30a3\u30fc\u30eb\u30c9\u306bRandom\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4fdd\u6301\uff08has\uff09\u3057\u5fc5\u8981\u306b\u5fdc\u3058\u3066Random\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u5229\u7528\u3067\u304d\u308b<\/p>\n<p>has-a\u95a2\u4fc2\u3068\u3044\u3046<\/p>\n<p>\u30e1\u30ea\u30c3\u30c8\uff1a<\/p>\n<p>\u30af\u30e9\u30b9\u540c\u58eb\u306e\u95a2\u4fc2\u304c\u7de9\u304f\u306a\u308b<br \/>\npublic\u30e1\u30f3\u30d0\u30fc\u3092\u5229\u7528\u3059\u308b\u306e\u3067\u5185\u90e8\u5b9f\u88c5\u306b\u5de6\u53f3\u3057\u306a\u3044<\/p>\n<p>\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u4fdd\u6301\u3059\u308b\u306e\u3067\u95a2\u4fc2\u304c\u56fa\u5b9a\u3057\u306a\u3044<\/p>\n<p>\u5f8c\u304b\u3089\u59d4\u8b72\u5148\u5909\u66f4\u53ef\u80fd<br \/>\n\u8907\u6570\u30af\u30e9\u30b9\u306b\u51e6\u7406\u59d4\u8b72\u53ef\u80fd<br \/>\n\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5358\u4f4d\u3067\u59d4\u8b72\u5148\u5909\u66f4\u53ef\u80fd<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Random<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Roulette<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">bound<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"c1\">\/\/\u4ee5\u4e0a\u5148\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u4fdd\u6301<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">Random<\/span> <span class=\"n\">random<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Random<\/span><span class=\"o\">();<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Roulette<\/span><span class=\"o\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">bound<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">bound<\/span> <span class=\"o\">=<\/span> <span class=\"n\">bound<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u51e6\u7406\u3092\u59d4\u8b72<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">nextInt<\/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\">random<\/span><span class=\"o\">.<\/span><span class=\"na\">nextInt<\/span><span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">bound<\/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>\u7ee7\u627f\u7684\u610f\u601d\u662f \u5143\u306b\u306a\u308b\u30af\u30e9\u30b9\u306e\u30e1\u30f3\u30d0\u30fc\u3092\u5f15\u304d\u7d99\u304e\u3001\u65b0\u305f\u306a\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068 \u57fa\u5e95\u30af\u30e9\u30b9\uff08\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9\u3001\u89aa\u30af [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31481","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\u3011\u7ee7\u627f\uff08Inheritance\uff09\u7684\u610f\u601d\u662f\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u65b0\u7c7b\uff0c\u4ece\u73b0\u6709\u7684\u7c7b\u4e2d\u7ee7\u627f\u5c5e\u6027\u548c\u65b9\u6cd5 - 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\" 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