{"id":31524,"date":"2023-08-20T08:59:46","date_gmt":"2023-01-19T18:22:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91object%e7%b1%bb\/"},"modified":"2024-04-30T19:20:02","modified_gmt":"2024-04-30T11:20:02","slug":"%e3%80%90java%e3%80%91object%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91object%e7%b1%bb\/","title":{"rendered":"\u3010Java\u3011Object\u7c7b"},"content":{"rendered":"<h1>Object\u7c7b\u662f\u4ec0\u4e48<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u5ba3\u8a00\u306e\u969b\u306bextends\u53e5\u3092\u7701\u7565\u3057\u305f\u6642\u306b\u6697\u9ed9\u7684\u306b\u7d99\u627f\u3055\u308c\u308b\u30af\u30e9\u30b9<\/ul>\n<\/li>\n<\/ul>\n<p>\u5168\u30af\u30e9\u30b9\u304c\u6700\u7d42\u7684\u306bObject\u30af\u30e9\u30b9\u3092\u30eb\u30fc\u30c8\u306b\u3082\u3064<br \/>\n\u5168\u30af\u30e9\u30b9\u3067Object\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u5229\u7528\u3067\u304d\u308b\uff08\u5fc5\u8981\u306b\u5fdc\u3058\u6d3e\u751f\u30af\u30e9\u30b9\u3067Override\uff09<\/p>\n<p>clone()\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30b3\u30d4\u30fc\u4f5c\u6210<\/p>\n<p>finalize()\uff1a\u7834\u68c4\u3059\u308b\u6642\u306b\u5b9f\u884c<\/p>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u7834\u68c4\u3055\u308c\u308b\u6642\u306b\u30ac\u30d9\u30fc\u30b8\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u547c\u3070\u308c\u308b\u30e1\u30bd\u30c3\u30c9\u4fdd\u8a3c\u3055\u308c\u3066\u306a\u3044\u306e\u3067\u5b9f\u969b\u306e\u30a2\u30d7\u30ea\u3067\u306f\u4f7f\u3046\u3079\u304d\u3067\u306f\u306a\u3044<\/p>\n<p>equals(object obj)\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8obj\u3068\u7b49\u3057\u3044\u304b\uff1f<\/p>\n<p>getClass()\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30af\u30e9\u30b9\u3092\u53d6\u5f97<\/p>\n<p>hashCode()\uff1a\u30cf\u30c3\u30b7\u30e5\u30b3\u30fc\u30c9\u3092\u53d6\u5f97<\/p>\n<p>toString()\uff1a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6587\u5b57\u5217\u3067\u53d6\u5f97<\/p>\n<h2>toSrting\u65b9\u6cd5<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u53ef\u80fd\u306a\u3089\u5168\u30af\u30e9\u30b9\u3067\u5b9f\u88c5\u3059\u3079\u304d<\/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\">\u9069\u5207\u306a\u6587\u5b57\u5217\u8868\u73fe\u3092\u7528\u610f\u3059\u308b\u3053\u3068\u3067\u30c6\u30b9\u30c8\u6642\u306a\u3069\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u6982\u8981\u78ba\u8a8d\u3067\u304d\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>System.out.println(obj); \/\/println\u306f\u5185\u90e8\u7684\u306btoString\u30e1\u30bd\u30c3\u30c9\u547c\u3076<\/p>\n<p>\u30af\u30e9\u30b9\u3092\u7279\u5fb4\u4ed8\u3051\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u9078\u5225\u3057\u3066\u6587\u5b57\u5217\u5316\u3059\u308b\u306e\u304c\u30dd\u30a4\u30f3\u30c8\uff08\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u66f8\u304f\u306e\u304c\u76ee\u7684\u3067\u306a\u3044\uff09<br \/>\n\u4f7f\u3044\u3084\u3059\u3044\u3088\u3046\u306btoString\u3067\u5229\u7528\u3057\u305f\u60c5\u5831\uff08\u30d5\u30a3\u30fc\u30eb\u30c9\uff09\u306f\u500b\u5225\u306e\u30b2\u30c3\u30bf\u30fc\u7528\u610f\u3057\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/Person\u30af\u30e9\u30b9\u306btoString\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5<\/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\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"c1\">\/\/\u30af\u30e9\u30b9\u3092\u7279\u5fb4\u4ed8\u3051\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u9078\u5225\u3057\u6587\u5b57\u5217\u5316<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u5f7c\u5973\u306f\u3001%s %s \u3067\u3059\u3002\"<\/span><span class=\"o\">,<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u500b\u5225\u306e\u30b2\u30c3\u30bf\u30fc\u3067\u3082\u53d6\u5f97\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getLastName<\/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\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">getFirstName<\/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\">firstName<\/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\">ToStringBasic<\/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\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Eilish\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Billie\"<\/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=\"c1\">\/\/\u5f7c\u5973\u306f\u3001Billie Eilish \u3067\u3059\u3002<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>equals\u65b9\u6cd5<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540c\u58eb\u304c\u7b49\u3057\u3044\u304b\u3069\u3046\u304b\u540c\u4e00\u6027\u5224\u5b9a<\/ul>\n<\/li>\n<\/ul>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u53c2\u7167\u304c\u540c\u3058\u304b\u3069\u3046\u304b<\/p>\n<p>\u610f\u5473\u306e\u7b49\u4fa1\u5224\u5b9a\u306b\u306fequal\u30e1\u30bd\u30c3\u30c9\u306e\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u5fc5\u8981<\/p>\n<p>\u4e2d\u8eab\u304c\u8907\u96d1\u306a\u306e\u3067\u5fc5\u8981\u6642\u306e\u307f\u5b9f\u88c5\u3057\u3088\u3046<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/firstName\/lastName\u30d5\u30a3\u30fc\u30eb\u30c9\u306ePerson\u30af\u30e9\u30b9\u306bequals\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5<\/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\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u59d3\u540d\u5171\u306b\u7b49\u3057\u3044\u5834\u5408\u7b49\u5024<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">equals<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u540c\u4e00\u6027\u306e\u5224\u5b9a<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span> <span class=\"o\">==<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/\u540c\u5024\u6027\u306e\u5224\u5b9a<\/span>\r\n    <span class=\"c1\">\/\/instanceof\u3067\u578b\u30c1\u30a7\u30c3\u30af\u3057\u578b\u30ad\u30e3\u30b9\u30c8(\u30c0\u30a6\u30f3\u30ad\u30e3\u30b9\u30c8)<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"kt\">var<\/span> <span class=\"n\">p<\/span>  <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Person<\/span><span class=\"o\">)<\/span><span class=\"n\">obj<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"c1\">\/\/\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u540c\u5024\u3092\u5224\u5b9a(String\u30af\u30e9\u30b9\u306eequals\u30e1\u30bd\u30c3\u30c9)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span>\r\n          <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/\u5f15\u6570obj\u306e\u578b\u304c\u9055\u3046\u5834\u5408false<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5e94\u9075\u5b88\u7684\u7b49\u5f0f<\/h3>\n<p>\u53cd\u5c04\u6027\uff1ax.equals(x)\u306ftrue<\/p>\n<p>\u5bfe\u79f0\u6027\uff1ax.equals(x)\u304ctrue\u306a\u3089y.equals(x)\u306ftrue<\/p>\n<p>\u5bfe\u79f0\u6027\u306b\u9055\u53cd\u3057\u3066\u3057\u307e\u3044\u304c\u3061\u306a\u306e\u3067\u6ce8\u610f<\/p>\n<p>\u63a8\u79fb\u6027\uff1ax.equals(x)\u3068y.equals(z)\u304ctrue\u306a\u3089x.equals(z)\u306ftrue<\/p>\n<p>\u4e00\u8cab\u6027\uff1ax,y\u306b\u5909\u66f4\u306a\u3051\u308c\u3070\u3001x.equals(y)\u3092\u8907\u6570\u547c\u3073\u51fa\u3057\u3066\u3082\u5e38\u306btrue\/false\u7d50\u679c\u306f\u5909\u5316\u3057\u306a\u3044<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u5bfe\u79f0\u6027\u9055\u53cd\u306b\u306a\u308b\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">department<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/\u90e8\u7f72\u6bd4\u8f03\u8ffd\u52a0<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">BusinessPerson<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">department<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span> <span class=\"o\">=<\/span> <span class=\"n\">department<\/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\">boolean<\/span> <span class=\"nf\">equals<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u540c\u4e00\u6027<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span> <span class=\"o\">==<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"c1\">\/\/\u540c\u5024\u6027<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nc\">BusinessPerson<\/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=\"o\">(<\/span><span class=\"nc\">BusinessPerson<\/span><span class=\"o\">)<\/span><span class=\"n\">obj<\/span><span class=\"o\">;<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span>\r\n          <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kc\">false<\/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\">EqualsBasic<\/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\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u7531\u5b9f\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u677e\u4efb\u8c37\"<\/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><span class=\"s\">\"\u7531\u5b9f\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u677e\u4efb\u8c37\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u4f5c\u66f2\u5bb6\"<\/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\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp<\/span><span class=\"o\">));<\/span>  <span class=\"c1\">\/\/true<\/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\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span><span class=\"o\">));<\/span>  <span class=\"c1\">\/\/false<\/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\">\u554f\u984c\u70b9\uff1a<\/ul>\n<\/li>\n<\/ul>\n<p>Person\u30af\u30e9\u30b9\u306eequals\u30e1\u30bd\u30c3\u30c9\u3067\u306ftitle\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7121\u8996\u3057\u3066\u6bd4\u8f03\u3059\u308b\u306e\u3067p\u3068bp\u306f\u540c\u5024<br \/>\nBusinessPerson\u30af\u30e9\u30b9\u306eequals\u30e1\u30bd\u30c3\u30c9\u3067\u306fp\u304cBusinessPerson\u3067\u306a\u3044\u306e\u3067\u540c\u5024\u3068\u307f\u306a\u305b\u306a\u3044<\/p>\n<p>obj\u306bPerson\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\u306bdepartment\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7121\u8996\u3057\u3066\u6bd4\u8f03<br \/>\n\u2192\u5bfe\u79f0\u6027\u9055\u53cd\u306f\u89e3\u6d88\u3059\u308b\u304c\u63a8\u79fb\u6027\u9055\u53cd\u306b\u306a\u308b(\u59d4\u8b72\u3092\u7528\u3044\u308b\u3053\u3068\u3082\u691c\u8a0e)<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/\u63a8\u79fb\u6027\u9055\u53cd\u306b\u306a\u308b\u554f\u984c\u306e\u3042\u308b\u30b3\u30fc\u30c9<\/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=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">department<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">BusinessPerson<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">department<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span> <span class=\"o\">=<\/span> <span class=\"n\">department<\/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\">boolean<\/span> <span class=\"nf\">equals<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span> <span class=\"o\">==<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"c1\">\/\/BusinessPerson\u578b\u306e\u5834\u5408\u5168\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u6bd4\u8f03<\/span>\r\n      <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj<\/span> <span class=\"k\">instanceof<\/span> <span class=\"nc\">BusinessPerson<\/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=\"o\">(<\/span><span class=\"nc\">BusinessPerson<\/span><span class=\"o\">)<\/span><span class=\"n\">obj<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span>\r\n            <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp<\/span><span class=\"o\">.<\/span><span class=\"na\">department<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"c1\">\/\/Person\u578b\u3067\u306fdepartment\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u7121\u8996\u3057\u3066\u6bd4\u8f03<\/span>\r\n      <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">obj<\/span><span class=\"o\">);<\/span>\r\n      <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kc\">false<\/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\">EqualsBasic<\/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\">p<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u7531\u5b9f\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u677e\u4efb\u8c37\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">bp1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u7531\u5b9f\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u677e\u4efb\u8c37\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u4f5c\u66f2\u5bb6\"<\/span><span class=\"o\">);<\/span> \r\n    <span class=\"kt\">var<\/span> <span class=\"n\">bp2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">BusinessPerson<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u7531\u5b9f\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u677e\u4efb\u8c37\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"\u6b4c\u624b\"<\/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\">bp1<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">p<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/true<\/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\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp1<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/true<\/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\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp2<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/true<\/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\">bp1<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">bp2<\/span><span class=\"o\">));<\/span> <span class=\"c1\">\/\/false \u63a8\u79fb\u6027\u9055\u53cd\uff01<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u83b7\u53d6\u5bf9\u8c61\u7684\u54c8\u5e0c\u503c<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">hashCode\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30cf\u30c3\u30b7\u30e5\u5024\uff08\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30c7\u30fc\u30bf\u3092\u5143\u306b\u751f\u6210\u3055\u308c\u305fint\u5024\uff09\u3092\u8fd4\u3059<\/p>\n<p>HashMap\/HashSet\u306a\u3069\u306e\u30cf\u30c3\u30b7\u30e5\u8868\u3067\u5024\u3092\u6b63\u3057\u304f\u7ba1\u7406\u3059\u308b\u305f\u3081\u306e\u60c5\u5831<br \/>\n\u540c\u5024\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u540c\u3058\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u8fd4\u3059<br \/>\nequals\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u305f\u5834\u5408hashCode\u30e1\u30bd\u30c3\u30c9\u3082\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b<\/p>\n<p>\u30af\u30e9\u30b9\u304c\u4e0d\u5909\u306a\u3089\u30e1\u30bd\u30c3\u30c9\u547c\u3073\u51fa\u3057\u306e\u5ea6\u306b\u8a08\u7b97\u3059\u308b\u306e\u3067\u306f\u306a\u304f\u30d5\u30a3\u30fc\u30eb\u30c9\u5024\u3068\u3057\u3066\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u30ad\u30e3\u30c3\u30b7\u30e5<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">ObjectHash<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">boolean<\/span> <span class=\"n\">boolValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">intValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">long<\/span> <span class=\"n\">longValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">float<\/span> <span class=\"n\">floatValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">doubleValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">stringValue<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">hashCode<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">final<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">31<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"o\">;<\/span>\r\n\r\n    <span class=\"c1\">\/\/\u30cf\u30c3\u30b7\u30e5\u5024\u3092\u4f7f\u3063\u3066\u4ee5\u4e0b\u306e\u8a08\u7b97<\/span>\r\n    <span class=\"c1\">\/\/hash = result*31^(n) + v_1*31^(n-1) +..+ v_n<\/span>\r\n    <span class=\"c1\">\/\/v_1~v_n\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u306eint\u5024<\/span>\r\n    <span class=\"c1\">\/\/n\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u6570<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"o\">(<\/span><span class=\"n\">boolValue<\/span> <span class=\"o\">?<\/span> <span class=\"mi\">1231<\/span> <span class=\"o\">:<\/span> <span class=\"mi\">1237<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"kt\">long<\/span> <span class=\"n\">temp<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"c1\">\/\/doubleToLongBits\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u306flong\u578b<\/span>\r\n    <span class=\"n\">temp<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Double<\/span><span class=\"o\">.<\/span><span class=\"na\">doubleToLongBits<\/span><span class=\"o\">(<\/span><span class=\"n\">doubleValue<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">)<\/span> <span class=\"o\">(<\/span><span class=\"n\">temp<\/span> <span class=\"o\">^<\/span> <span class=\"o\">(<\/span><span class=\"n\">temp<\/span> <span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"mi\">32<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"nc\">Float<\/span><span class=\"o\">.<\/span><span class=\"na\">floatToIntBits<\/span><span class=\"o\">(<\/span><span class=\"n\">floatValue<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"n\">intValue<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"o\">(<\/span><span class=\"kt\">int<\/span><span class=\"o\">)<\/span> <span class=\"o\">(<\/span><span class=\"n\">longValue<\/span> <span class=\"o\">^<\/span> <span class=\"o\">(<\/span><span class=\"n\">longValue<\/span> <span class=\"o\">&gt;&gt;&gt;<\/span> <span class=\"mi\">32<\/span><span class=\"o\">));<\/span>\r\n    <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"n\">prime<\/span> <span class=\"o\">*<\/span> <span class=\"n\">result<\/span> <span class=\"o\">+<\/span> <span class=\"o\">((<\/span><span class=\"n\">stringValue<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">?<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">:<\/span> <span class=\"n\">stringValue<\/span><span class=\"o\">.<\/span><span class=\"na\">hashCode<\/span><span class=\"o\">());<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">result<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">boolean<\/span> <span class=\"nf\">equals<\/span><span class=\"o\">(<\/span><span class=\"nc\">Object<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span> <span class=\"o\">==<\/span> <span class=\"n\">obj<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">getClass<\/span><span class=\"o\">()<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">obj<\/span><span class=\"o\">.<\/span><span class=\"na\">getClass<\/span><span class=\"o\">())<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"nc\">ObjectHash<\/span> <span class=\"n\">other<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">ObjectHash<\/span><span class=\"o\">)<\/span> <span class=\"n\">obj<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">boolValue<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">boolValue<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Double<\/span><span class=\"o\">.<\/span><span class=\"na\">doubleToLongBits<\/span><span class=\"o\">(<\/span><span class=\"n\">doubleValue<\/span><span class=\"o\">)<\/span> <span class=\"o\">!=<\/span> <span class=\"nc\">Double<\/span><span class=\"o\">.<\/span><span class=\"na\">doubleToLongBits<\/span><span class=\"o\">(<\/span><span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">doubleValue<\/span><span class=\"o\">))<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Float<\/span><span class=\"o\">.<\/span><span class=\"na\">floatToIntBits<\/span><span class=\"o\">(<\/span><span class=\"n\">floatValue<\/span><span class=\"o\">)<\/span> <span class=\"o\">!=<\/span> <span class=\"nc\">Float<\/span><span class=\"o\">.<\/span><span class=\"na\">floatToIntBits<\/span><span class=\"o\">(<\/span><span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">floatValue<\/span><span class=\"o\">))<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">intValue<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">intValue<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">longValue<\/span> <span class=\"o\">!=<\/span> <span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">longValue<\/span><span class=\"o\">)<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">stringValue<\/span> <span class=\"o\">==<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">stringValue<\/span> <span class=\"o\">!=<\/span> <span class=\"kc\">null<\/span><span class=\"o\">)<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"k\">if<\/span> <span class=\"o\">(!<\/span><span class=\"n\">stringValue<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">other<\/span><span class=\"o\">.<\/span><span class=\"na\">stringValue<\/span><span class=\"o\">))<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"kc\">false<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"kc\">true<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u6bd4\u8f83\u5bf9\u8c61<\/h2>\n<p>compareTo\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>Arrays.sort\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30bd\u30fc\u30c8<br \/>\nTreeMap\/TreeSet\u306e\u9806\u5e8f\u4ed8\u304d\u306e\u30ad\u30fc\u7ba1\u7406<\/p>\n<p>Object\u30af\u30e9\u30b9\u3067\u306f\u306a\u304fComparable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u5c5e\u3059\u308b\u30e1\u30bd\u30c3\u30c9<br \/>\n\u5024\u306e\u5927\u5c0f\u306b\u610f\u5473\u3092\u6301\u3063\u305f\u30af\u30e9\u30b9\u306a\u3089\u57fa\u672c\u5b9f\u88c5\u3059\u308b<\/p>\n<p>Comparable\u3067\u5b9f\u88c5<\/p>\n<p>\u306f\u6bd4\u8f03\u5bfe\u8c61\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<br \/>\nComparable<\/p>\n<p>\u5927\u5c0f\u306b\u5fdc\u3058\u3066\u4ee5\u4e0b\u30eb\u30fc\u30eb\u3067\u5024\u3092\u8fd4\u3059<\/p>\n<p>this&gt;\u5f15\u6570\uff1a\u6574\u6570<\/p>\n<p>this=\u5f15\u6570\uff1a0<\/p>\n<p>this&lt;\u5f15\u6570\uff1a\u8ca0\u6570<\/p>\n<p>\u6700\u521d\u306blastNameKana\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u5927\u5c0f\u6bd4\u8f03<br \/>\n\u7b49\u3057\u3044\u5834\u5408firstNameKana\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u5927\u5c0f\u6bd4\u8f03<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/Person\u30af\u30e9\u30b9\u306bcompareTo\u30e1\u30bd\u30c3\u30c9\u3092\u5b9f\u88c5\u3059\u308b\u4f8b<\/span>\r\n<span class=\"c1\">\/\/&lt;Person&gt;\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6bd4\u8f03\u5bfe\u8c61<\/span>\r\n<span class=\"c1\">\/\/\u59d3\u306e\u8f9e\u66f8\u9806\u306b\u4e26\u3079\u308b<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Person<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Comparable<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Person<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstNameKana<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastNameKana<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstNameKana<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastNameKana<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstNameKana<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstNameKana<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/span> <span class=\"o\">=<\/span> <span class=\"n\">lastNameKana<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u540d\u5b57\u3001\u540d\u524d\u30ab\u30ca\u3067\u5927\u5c0f\u5224\u5b9a<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"c1\">\/\/\u6700\u521d\u306b`lastNameKana\u30d5\u30a3\u30fc\u30eb\u30c9`\u3067\u5927\u5c0f\u6bd4\u8f03<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">int<\/span> <span class=\"nf\">compareTo<\/span><span class=\"o\">(<\/span><span class=\"nc\">Person<\/span> <span class=\"n\">o<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/\u7b49\u3057\u3044\u5834\u5408`firstNameKana\u30d5\u30a3\u30fc\u30eb\u30c9`\u3067\u5927\u5c0f\u6bd4\u8f03<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/span><span class=\"o\">.<\/span><span class=\"na\">equals<\/span><span class=\"o\">(<\/span><span class=\"n\">o<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/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\">firstNameKana<\/span><span class=\"o\">.<\/span><span class=\"na\">compareTo<\/span><span class=\"o\">(<\/span><span class=\"n\">o<\/span><span class=\"o\">.<\/span><span class=\"na\">firstNameKana<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/span><span class=\"o\">.<\/span><span class=\"na\">compareTo<\/span><span class=\"o\">(<\/span><span class=\"n\">o<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/span><span class=\"o\">);<\/span>\r\n    <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=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastNameKana<\/span> <span class=\"o\">+<\/span> <span class=\"s\">\" \"<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstNameKana<\/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.Arrays<\/span><span class=\"o\">;<\/span>\r\n<span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Arrays<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">CompareBasic<\/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\">data<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Person<\/span><span class=\"o\">[]<\/span> <span class=\"o\">{<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Harry\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Potter\"<\/span><span class=\"o\">),<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Ron\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Weasley\"<\/span><span class=\"o\">),<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Hermione\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Granger\"<\/span><span class=\"o\">),<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Albus\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Dumbledore\"<\/span><span class=\"o\">),<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Severus\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Snape\"<\/span><span class=\"o\">),<\/span>\r\n                <span class=\"k\">new<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Serius\"<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"Black\"<\/span><span class=\"o\">),<\/span>\r\n        <span class=\"o\">};<\/span>\r\n        <span class=\"nc\">Arrays<\/span><span class=\"o\">.<\/span><span class=\"na\">sort<\/span><span class=\"o\">(<\/span><span class=\"n\">data<\/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=\"nc\">Arrays<\/span><span class=\"o\">.<\/span><span class=\"na\">toString<\/span><span class=\"o\">(<\/span><span class=\"n\">data<\/span><span class=\"o\">));<\/span>\r\n        <span class=\"c1\">\/\/[Black Serius, Dumbledore Albus, Granger Hermione, Potter Harry, Snape Severus, Weasley Ron]<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u590d\u5236\u5bf9\u8c61<\/h2>\n<p>clone\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>x.clone()!= x \u7570\u306a\u308b\u53c2\u7167\u3067\u3042\u308b\u3053\u3068<\/p>\n<p>x.clone().getClass() == x.getClass() \u578b\u304c\u4e00\u81f4\u3057\u3066\u308b\u3053\u3068<\/p>\n<p>x.clone().equals(x) \u540c\u5024\u6027\u3092\u6e80\u305f\u3059\u3053\u3068<\/p>\n<p>\u6ce8\u610f\uff1a\u4ee3\u5165\u6f14\u7b97\u5b50=\u306f\u53c2\u7167\u306e\u30b3\u30d4\u30fc\u306e\u307f\u3067\u8907\u88fd\u306b\u306a\u3089\u306a\u3044<\/p>\n<p>var x_copy = x;<\/p>\n<p>\u30b7\u30e3\u30ed\u30fc\u30b3\u30d4\u30fc<\/p>\n<p>Cloneable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff1a\u305d\u308c\u81ea\u4f53\u306f\u610f\u5473\u3092\u6301\u305f\u306a\u3044\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9 (\u30de\u30fc\u30ab\u30fc\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9)<\/p>\n<p>Cloneable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308b\u9650\u308aCloneNotSupportedException\u306f\u767a\u751f\u3057\u306a\u3044<\/p>\n<p>AssertionError\uff1a\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u672c\u6765\u8d77\u3053\u308a\u3048\u306a\u3044\u4e88\u671f\u3057\u306a\u3044\u52d5\u4f5c\u3092\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u8868\u3059\u30a8\u30e9\u30fc<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/Cloneable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u660e\u793a\u7684\u306b\u8907\u88fd\u3092\u8a31\u53ef<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Person<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Cloneable<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/\u623b\u308a\u5024\u3092\u672c\u6765\u306eObject\u3067\u306f\u306a\u304fPerson\u578b\u306b\u5408\u308f\u305b\u5229\u7528\u8005\u5074\u3067\u30ad\u30e3\u30b9\u30c8\u306e\u624b\u9593\u3092\u7701\u304f<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nc\">Person<\/span> <span class=\"nf\">clone<\/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=\"kc\">null<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"c1\">\/\/Object\u30af\u30e9\u30b9\u306eclone\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059<\/span>\r\n      <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Person<\/span><span class=\"o\">)<\/span><span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">CloneNotSupportedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">AssertionError<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">p<\/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=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span> <span class=\"o\">+<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5f53\u5728\u5b57\u6bb5\u4e2d\u5305\u542b\u53ef\u53d8\u7c7b\u578b\u65f6\u7684\u590d\u5236<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc<\/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\">\u53c2\u7167\u578b\u306e\u30b3\u30d4\u30fc\u3067\u914d\u5217\u30b3\u30d4\u30fc\u306bclone\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046<\/ul>\n<\/li>\n<\/ul>\n<p>cf: \u3088\u308a\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u512a\u308c\u308bArrays.copyOf\/copyOfRange\u30e1\u30bd\u30c3\u30c9 \u304c\u304a\u3059\u3059\u3081<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Person<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Cloneable<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">memos<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Person<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">memos<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">firstName<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span> <span class=\"o\">=<\/span> <span class=\"n\">lastName<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">memos<\/span> <span class=\"o\">=<\/span> <span class=\"n\">memos<\/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=\"nc\">Person<\/span> <span class=\"nf\">clone<\/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=\"kc\">null<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">try<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"n\">p<\/span> <span class=\"o\">=<\/span> <span class=\"o\">(<\/span><span class=\"nc\">Person<\/span><span class=\"o\">)<\/span> <span class=\"kd\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n      <span class=\"c1\">\/\/\u8a72\u5f53\u30d5\u30a3\u30fc\u30eb\u30c9\u306eclone\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u3067\u914d\u5217\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u660e\u793a\u7684\u306b\u8907\u88fd<\/span>\r\n      <span class=\"n\">p<\/span><span class=\"o\">.<\/span><span class=\"na\">memos<\/span> <span class=\"o\">=<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">memos<\/span><span class=\"o\">.<\/span><span class=\"na\">clone<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span> <span class=\"k\">catch<\/span> <span class=\"o\">(<\/span><span class=\"nc\">CloneNotSupportedException<\/span> <span class=\"n\">e<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n      <span class=\"k\">throw<\/span> <span class=\"k\">new<\/span> <span class=\"nf\">AssertionError<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"o\">}<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"n\">p<\/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=\"nc\">String<\/span> <span class=\"nf\">toString<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span>  <span class=\"nc\">String<\/span><span class=\"o\">.<\/span><span class=\"na\">format<\/span><span class=\"o\">(<\/span><span class=\"s\">\"%s%s\uff08%s\uff09\"<\/span><span class=\"o\">,<\/span>\r\n        <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">lastName<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">firstName<\/span><span class=\"o\">,<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">memos<\/span><span class=\"o\">[<\/span><span class=\"mi\">1<\/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>Object\u7c7b\u662f\u4ec0\u4e48 \u30af\u30e9\u30b9\u5ba3\u8a00\u306e\u969b\u306bextends\u53e5\u3092\u7701\u7565\u3057\u305f\u6642\u306b\u6697\u9ed9\u7684\u306b\u7d99\u627f\u3055\u308c\u308b\u30af\u30e9\u30b9 \u5168\u30af\u30e9\u30b9\u304c\u6700\u7d42\u7684 [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31524","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\u3011Object\u7c7b - 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\u3011object\u7c7b\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011Object\u7c7b\" \/>\n<meta property=\"og:description\" content=\"Object\u7c7b\u662f\u4ec0\u4e48 \u30af\u30e9\u30b9\u5ba3\u8a00\u306e\u969b\u306bextends\u53e5\u3092\u7701\u7565\u3057\u305f\u6642\u306b\u6697\u9ed9\u7684\u306b\u7d99\u627f\u3055\u308c\u308b\u30af\u30e9\u30b9 \u5168\u30af\u30e9\u30b9\u304c\u6700\u7d42\u7684 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011object\u7c7b\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-19T18:22:40+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-30T11:20:02+00:00\" \/>\n<meta name=\"author\" content=\"\u96c5, \u609f\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u96c5, \u609f\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91object%e7%b1%bb\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91object%e7%b1%bb\/\",\"name\":\"\u3010Java\u3011Object\u7c7b - Blog - Silicon 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