{"id":35370,"date":"2024-11-26T10:14:21","date_gmt":"2024-11-26T02:14:21","guid":{"rendered":"https:\/\/fwq.ai\/blog\/35370\/"},"modified":"2024-11-26T10:14:21","modified_gmt":"2024-11-26T02:14:21","slug":"java%e6%80%8e%e4%b9%88%e4%bb%8e%e6%95%b0%e7%bb%84%e4%b8%ad%e8%8e%b7%e5%8f%96%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/35370\/","title":{"rendered":"java\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u7531\u5176\u58f0\u660e\u7c7b\u578b\u51b3\u5b9a\u3002\u8981\u83b7\u53d6\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1agetclass() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u5143\u7d20\u7c7b\u578b\u7684 class \u5bf9\u8c61\uff1b\u7c7b\u578b\u64e6\u9664\u5220\u9664\u6cdb\u578b\u4fe1\u606f\uff0c\u53ef\u901a\u8fc7\u8bbf\u95ee\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7c7b\u578b\u6765\u83b7\u53d6\u5143\u7d20\u7c7b\u578b\uff1b\u6570\u7ec4\u58f0\u660e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6\u5143\u7d20\u7c7b\u578b\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/04\/2024110401421739249.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b\u63d2\u56fe\" alt=\"java\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u4ece Java \u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u7531\u6570\u7ec4\u7684\u58f0\u660e\u7c7b\u578b\u51b3\u5b9a\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>int[] intArray = {1, 2, 3};\nString[] stringArray = {\"a\", \"b\", \"c\"};<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528 getClass() \u65b9\u6cd5<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u5316\u7684 Class \u5bf9\u8c61\u3002<\/p>\n<pre>Class&lt;?&gt; elementType = intArray.getClass().getComponentType();\nSystem.out.println(elementType); \/\/ \u8f93\u51fa\uff1aint<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528\u7c7b\u578b\u64e6\u9664<\/strong><\/p>\n<p>Java \u5141\u8bb8\u4f7f\u7528\u7c7b\u578b\u64e6\u9664\u7684\u7279\u6027\u6765\u83b7\u53d6\u6570\u7ec4\u5143\u7d20\u7684\u7c7b\u578b\u3002\u7c7b\u578b\u64e6\u9664\u4f1a\u5220\u9664\u6cdb\u578b\u7c7b\u578b\u4fe1\u606f\u3002<\/p>\n<pre>int[] intArray = {1, 2, 3};\nint elementType = intArray[0].getClass();\nSystem.out.println(elementType); \/\/ \u8f93\u51fa\uff1aint<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528\u6570\u7ec4\u58f0\u660e\u7c7b\u578b<\/strong><\/p>\n<p>\u6570\u7ec4\u58f0\u660e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u7528\u6765\u83b7\u53d6\u6570\u7ec4\u5143\u7d20\u7684\u7c7b\u578b\u3002<\/p>\n<pre>int[] intArray;\nint elementType = intArray.getClass().getComponentType();\nSystem.out.println(elementType); \/\/ \u8f93\u51fa\uff1aint<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<ul>\n<li>\u4e0a\u8ff0\u65b9\u6cd5\u53ea\u9002\u7528\u4e8e\u539f\u59cb\u7c7b\u578b\u548c\u5bf9\u8c61\u7c7b\u578b\u6570\u7ec4\u3002<\/li>\n<li>\u5982\u679c\u6570\u7ec4\u5305\u542b\u5f15\u7528\u7c7b\u578b\u7684\u5143\u7d20\uff0c\u5219 getClass() \u65b9\u6cd5\u5c06\u8fd4\u56de\u5143\u7d20\u7684\u7c7b\u7c7b\u578b\uff0c\u800c\u4e0d\u662f\u5176\u57fa\u672c\u7c7b\u578b\u3002\u4f8b\u5982\uff0c\u5982\u679c String[] \u6570\u7ec4\u5305\u542b Integer \u5bf9\u8c61\uff0c\u5219 getClass() \u65b9\u6cd5\u5c06\u8fd4\u56de Integer \u7c7b\u3002<\/li>\n<li>\u5728 Java 9 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 getGenericComponentType() \u65b9\u6cd5\u6765\u83b7\u53d6\u6cdb\u578b\u6570\u7ec4\u7684\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u4ece\u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 java \u4e2d\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u7531\u5176\u58f0\u660e\u7c7b\u578b\u51b3\u5b9a\u3002\u8981\u83b7\u53d6\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1agetclass() \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u5143\u7d20\u7c7b\u578b\u7684 class \u5bf9\u8c61\uff1b\u7c7b\u578b\u64e6\u9664\u5220\u9664\u6cdb\u578b\u4fe1\u606f\uff0c\u53ef\u901a\u8fc7\u8bbf\u95ee\u6570\u7ec4\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7c7b\u578b\u6765\u83b7\u53d6\u5143\u7d20\u7c7b\u578b\uff1b\u6570\u7ec4\u58f0\u660e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6\u5143\u7d20\u7c7b\u578b\u3002 \u5982\u4f55\u4ece Java \u6570\u7ec4\u4e2d\u83b7\u53d6\u6570\u636e\u7c7b\u578b \u5728 Java \u4e2d\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\u7531\u6570\u7ec4\u7684\u58f0\u660e\u7c7b\u578b\u51b3\u5b9a\u3002\u4f8b\u5982\uff1a int[] intArray = {1, 2, 3}; String[] stringArray = {&#8220;a&#8221;, &#8220;b&#8221;, &#8220;c&#8221;}; \u767b\u5f55\u540e\u590d\u5236 \u8981\u83b7\u53d6\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. \u4f7f\u7528 getClass() \u65b9\u6cd5 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u6570\u7ec4\u5143\u7d20\u7c7b\u578b\u5316\u7684 Class \u5bf9\u8c61\u3002 Class&lt;?&gt; elementType = intArray.getClass().getComponentType(); System.out.println(elementType); \/\/ \u8f93\u51fa\uff1aint \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528\u7c7b\u578b\u64e6\u9664 Java \u5141\u8bb8\u4f7f\u7528\u7c7b\u578b\u64e6\u9664\u7684\u7279\u6027\u6765\u83b7\u53d6\u6570\u7ec4\u5143\u7d20\u7684\u7c7b\u578b\u3002\u7c7b\u578b\u64e6\u9664\u4f1a\u5220\u9664\u6cdb\u578b\u7c7b\u578b\u4fe1\u606f\u3002 int[] intArray = {1, 2, 3}; int elementType = [&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-35370","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35370","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=35370"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/35370\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=35370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=35370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=35370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}