{"id":65480,"date":"2025-05-03T12:25:26","date_gmt":"2025-05-03T04:25:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65480\/"},"modified":"2025-05-03T12:25:26","modified_gmt":"2025-05-03T04:25:26","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e5%88%a4%e6%96%ad%e6%95%b0%e7%bb%84%e7%b1%bb%e5%9e%8b-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65480\/","title":{"rendered":"java\u4e2d\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7c7b\u578b"},"content":{"rendered":"<blockquote><p>\n  java \u6570\u7ec4\u7c7b\u578b\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5224\u65ad\uff1ainstanceof \u8fd0\u7b97\u7b26\uff1a\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5c5e\u4e8e\u7279\u5b9a\u7c7b\u578b\u6216\u5176\u5b50\u7c7b\uff0c\u4f8b\u5982\u4f7f\u7528 class \u5bf9\u8c61\u8868\u793a\u6570\u7ec4\u7c7b\u578b\u3002getclass() \u65b9\u6cd5\uff1a\u8fd4\u56de\u8868\u793a\u5bf9\u8c61\u7c7b\u578b\u7684 class \u5bf9\u8c61\uff0c\u5bf9\u4e8e\u6570\u7ec4\uff0c\u5176\u7c7b\u578b\u4e3a class[]\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111302034082531.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7c7b\u578b\u63d2\u56fe\" alt=\"java\u4e2d\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7c7b\u578b\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u7c7b\u578b<\/strong><\/p>\n<p>\u5224\u65ad Java \u6570\u7ec4\u7c7b\u578b\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e24\u79cd\uff1a<\/p>\n<p><strong>1. instanceof \u8fd0\u7b97\u7b26<\/strong><\/p>\n<p>instanceof \u8fd0\u7b97\u7b26\u53ef\u7528\u4e8e\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5c5e\u4e8e\u7279\u5b9a\u7c7b\u578b\u6216\u5176\u5b50\u7c7b\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class \u5bf9\u8c61\u6765\u8868\u793a\u6570\u7ec4\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>int[] numbers = {1, 2, 3};\nboolean isIntArray = numbers instanceof int[];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cisIntArray \u5c06\u88ab\u8bbe\u7f6e\u4e3a true\uff0c\u56e0\u4e3a\u5b83\u8868\u660e numbers \u6570\u7ec4\u662f int \u6570\u7ec4\u3002<\/p>\n<p><strong>2. getClass() \u65b9\u6cd5<\/strong><\/p>\n<p>getClass() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u8be5\u5bf9\u8c61\u7c7b\u578b\u7684 Class \u5bf9\u8c61\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0cgetClass() \u8fd4\u56de\u7684 Class \u5bf9\u8c61\u662f\u4e00\u4e2a Class&gt;[] \u7c7b\u578b\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] numbers = {1, 2, 3};\nClass&lt;?&gt; componentType = numbers.getClass().getComponentType();\nboolean isIntArray = componentType == int.class;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0ccomponentType \u662f\u8868\u793a int \u7c7b\u578b\u6570\u7ec4\u7684 Class&gt; \u5bf9\u8c61\uff0c\u800c isIntArray \u5c06\u88ab\u8bbe\u7f6e\u4e3a true\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u600e\u4e48\u5224\u65ad\u6570\u7ec4\u7c7b\u578b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>java \u6570\u7ec4\u7c7b\u578b\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e24\u79cd\u65b9\u6cd5\u5224\u65ad\uff1ainstanceof \u8fd0\u7b97\u7b26\uff1a\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5c5e\u4e8e\u7279\u5b9a\u7c7b\u578b\u6216\u5176\u5b50\u7c7b\uff0c\u4f8b\u5982\u4f7f\u7528 class \u5bf9\u8c61\u8868\u793a\u6570\u7ec4\u7c7b\u578b\u3002getclass() \u65b9\u6cd5\uff1a\u8fd4\u56de\u8868\u793a\u5bf9\u8c61\u7c7b\u578b\u7684 class \u5bf9\u8c61\uff0c\u5bf9\u4e8e\u6570\u7ec4\uff0c\u5176\u7c7b\u578b\u4e3a class[]\u3002 \u5982\u4f55\u5224\u65ad Java \u6570\u7ec4\u7c7b\u578b \u5224\u65ad Java \u6570\u7ec4\u7c7b\u578b\u7684\u65b9\u6cd5\u4e3b\u8981\u6709\u4ee5\u4e0b\u4e24\u79cd\uff1a 1. instanceof \u8fd0\u7b97\u7b26 instanceof \u8fd0\u7b97\u7b26\u53ef\u7528\u4e8e\u68c0\u67e5\u5bf9\u8c61\u662f\u5426\u5c5e\u4e8e\u7279\u5b9a\u7c7b\u578b\u6216\u5176\u5b50\u7c7b\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Class \u5bf9\u8c61\u6765\u8868\u793a\u6570\u7ec4\u7684\u7c7b\u578b\u3002\u4f8b\u5982\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b int[] numbers = {1, 2, 3}; boolean isIntArray = numbers instanceof int[]; \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cisIntArray \u5c06\u88ab\u8bbe\u7f6e\u4e3a true\uff0c\u56e0\u4e3a\u5b83\u8868\u660e numbers \u6570\u7ec4\u662f int \u6570\u7ec4\u3002 2. getClass() \u65b9\u6cd5 getClass() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u8be5\u5bf9\u8c61\u7c7b\u578b\u7684 Class \u5bf9\u8c61\u3002\u5bf9\u4e8e\u6570\u7ec4\uff0cgetClass() \u8fd4\u56de\u7684 Class \u5bf9\u8c61\u662f\u4e00\u4e2a Class&gt;[] \u7c7b\u578b\u3002\u4f8b\u5982\uff1a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-65480","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=65480"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65480\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}