{"id":753,"date":"2022-10-07T18:30:11","date_gmt":"2022-10-07T10:30:11","guid":{"rendered":"https:\/\/qaqaq.top\/?p=753"},"modified":"2022-11-27T12:39:55","modified_gmt":"2022-11-27T04:39:55","slug":"%e9%9d%a2%e5%90%91%e5%af%b9%e8%b1%a1%e4%b8%ad-tostring%e7%9a%84%e4%bd%bf%e7%94%a8","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=753","title":{"rendered":"\u9762\u5411\u5bf9\u8c61(\u4e2d)-toString()\u7684\u4f7f\u7528"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P301;\r\n\r\nimport java.util.Objects;\r\n\r\npublic class Customer {\r\n\r\n\tprivate String name;\r\n\tprivate int age;\r\n\r\n\tpublic Customer() {\r\n\t\tsuper();\r\n\t}\r\n\r\n\tpublic Customer(String name, int age) {\r\n\t\tsuper();\r\n\t\tthis.name = name;\r\n\t\tthis.age = age;\r\n\t}\r\n\r\n\tpublic String getName() {\r\n\t\treturn name;\r\n\t}\r\n\r\n\tpublic void setName(String name) {\r\n\t\tthis.name = name;\r\n\t}\r\n\r\n\tpublic int getAge() {\r\n\t\treturn age;\r\n\t}\r\n\r\n\tpublic void setAge(int age) {\r\n\t\tthis.age = age;\r\n\t}\r\n\r\n\t\/\/ \u81ea\u52a8\u751f\u6210\u7684 equals()\r\n\t@Override\r\n\tpublic boolean equals(Object obj) {\r\n\t\tif (this == obj)\r\n\t\t\treturn true;\r\n\t\tif (obj == null)\r\n\t\t\treturn false;\r\n\t\tif (getClass() != obj.getClass())\r\n\t\t\treturn false;\r\n\t\tCustomer other = (Customer) obj;\r\n\t\treturn age == other.age &amp;&amp; Objects.equals(name, other.name);\r\n\t}\r\n\r\n\t\/\/ \u91cd\u5199\u7684\u539f\u5219\uff1a\u6bd4\u8f83\u4e24\u4e2a\u5bf9\u8c61\u7684\u5b9e\u4f53\u5185\u5bb9\uff08\u5373\uff1aname\u548cage\uff09\u662f\u5426\u76f8\u540c\r\n\t\/\/ \u624b\u52a8\u5b9e\u73b0 equals() \u7684\u91cd\u5199\r\n\/\/\t@Override\r\n\/\/\tpublic boolean equals(Object obj) {\r\n\/\/\t\t\r\n\/\/\/\/\t\tSystem.out.println(\"Customer equals()...\");\r\n\/\/\t\tif (this == obj) {\r\n\/\/            return true;\r\n\/\/        }\r\n\/\/\t\t\r\n\/\/\t\tif(obj instanceof Customer) {\r\n\/\/\t\t\tCustomer cust = (Customer)obj;\r\n\/\/\t\t\t\/\/\u6bd4\u8f83\u4e24\u4e2a\u5bf9\u8c61\u7684\u6bcf\u4e2a\u5c5e\u6027\u662f\u5426\u90fd\u76f8\u540c\r\n\/\/\/\/\t\t\tif(this.age == cust.age &amp;&amp; this.name.equals(cust.name)) {\r\n\/\/\/\/\t\t\t\treturn true;\r\n\/\/\/\/\t\t\t}else {\r\n\/\/\/\/\t\t\t\treturn false;\r\n\/\/\/\/\t\t\t}\r\n\/\/\t\t\t\r\n\/\/\t\t\t\/\/\u6216\r\n\/\/\t\t\treturn this.age == cust.age &amp;&amp; this.name.equals(cust.name);\r\n\/\/\t\t}else {\r\n\/\/\t\t\treturn false;\r\n\/\/\t\t}\r\n\/\/\t\t\r\n\/\/\t}\r\n\r\n\t\/\/ \u624b\u52a8\u5b9e\u73b0\r\n\/\/\t@Override\r\n\/\/\tpublic String toString() {\r\n\/\/\t\treturn \"Customer&#91;name = \" + name + \",age = \" + age + \"]\";\r\n\/\/\t}\r\n\r\n\t\/\/ \u81ea\u52a8\u5b9e\u73b0\r\n\t@Override\r\n\tpublic String toString() {\r\n\t\treturn \"Customer &#91;name=\" + name + \", age=\" + age + \"]\";\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P301;\r\n\r\nimport java.util.Date;\r\n\r\n\/*\r\n * Object\u7c7b\u4e2dtoString()\u7684\u4f7f\u7528\uff1a\r\n * \r\n * 1. \u5f53\u6211\u4eec\u8f93\u51fa\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\u65f6\uff0c\u5b9e\u9645\u4e0a\u5c31\u662f\u8c03\u7528\u5f53\u524d\u5bf9\u8c61\u7684toString()\r\n * \r\n * 2. Object\u7c7b\u4e2dtoString()\u7684\u5b9a\u4e49\uff1a\r\n *\t\tpublic String toString() {\r\n  \t\t\treturn getClass().getName() + \"@\" + Integer.toHexString(hashCode());\r\n  \t\t}\r\n * \r\n * 3. \u50cfString\u3001Date\u3001File\u3001\u5305\u88c5\u7c7b\u7b49\u90fd\u91cd\u5199\u4e86Object\u7c7b\u4e2d\u7684toString()\u65b9\u6cd5\u3002\r\n * \t\t\u4f7f\u5f97\u5728\u8c03\u7528\u5bf9\u8c61\u7684toString()\u65f6\uff0c\u8fd4\u56de\"\u5b9e\u4f53\u5185\u5bb9\"\u4fe1\u606f\r\n * \r\n * 4. \u81ea\u5b9a\u4e49\u7c7b\u4e5f\u53ef\u4ee5\u91cd\u5199toString()\u65b9\u6cd5\uff0c\u5f53\u8c03\u7528\u6b64\u65b9\u6cd5\u65f6\uff0c\u8fd4\u56de\u5bf9\u8c61\u7684\"\u5b9e\u4f53\u5185\u5bb9\"\r\n * \r\n *\/\r\npublic class ToStringTest {\r\n\r\n\tpublic static void main(String&#91;] args) {\r\n\t\t\r\n\t\tCustomer cust1 = new Customer(\"Tom\", 21);\r\n\t\tSystem.out.println(cust1.toString());\/\/top.qaqaq.java.P301.Customer@5aaa6d82-->Customer&#91;name = Tom,age = 21]\r\n\t\tSystem.out.println(cust1);\/\/top.qaqaq.java.P301.Customer@5aaa6d82-->Customer&#91;name = Tom,age = 21]\r\n\t\t\r\n\t\tString str = new String(\"MM\");\r\n\t\tSystem.out.println(str);\/\/MM\r\n\t\t\r\n\t\tDate date = new Date(4534534534543L);\r\n\t\tSystem.out.println(date.toString());\/\/Mon Sep 11 08:55:34 CST 2113\r\n\t}\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46],"class_list":["post-753","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/753"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=753"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/753\/revisions"}],"predecessor-version":[{"id":754,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/753\/revisions\/754"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}