{"id":37092,"date":"2024-11-26T10:42:01","date_gmt":"2024-11-26T02:42:01","guid":{"rendered":"https:\/\/fwq.ai\/blog\/37092\/"},"modified":"2024-11-26T10:42:01","modified_gmt":"2024-11-26T02:42:01","slug":"java-%e6%95%b0%e7%bb%84%e4%b8%ba%e7%a9%ba%e6%80%8e%e4%b9%88%e8%a1%a8%e7%a4%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/37092\/","title":{"rendered":"java \u6570\u7ec4\u4e3a\u7a7a\u600e\u4e48\u8868\u793a"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u7684\u7a7a\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528 null \u8868\u793a\uff0c\u8868\u793a\u6570\u7ec4\u53d8\u91cf\u4e0d\u5f15\u7528\u4efb\u4f55\u6570\u7ec4\u5bf9\u8c61\u3002\u53e6\u5916\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 0 \u7684\u6570\u7ec4\u6765\u8868\u793a\u7a7a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111300580836346.jpg\" class=\"aligncenter\" title=\"java \u6570\u7ec4\u4e3a\u7a7a\u600e\u4e48\u8868\u793a\u63d2\u56fe\" alt=\"java \u6570\u7ec4\u4e3a\u7a7a\u600e\u4e48\u8868\u793a\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u8868\u793a\u7a7a\u6570\u7ec4<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u7a7a\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8868\u793a\uff1a<\/p>\n<p><strong>null<\/strong><\/p>\n<p>\u8fd9\u662f\u8868\u793a\u7a7a\u6570\u7ec4\u6700\u7b80\u5355\u3001\u6700\u76f4\u63a5\u7684\u65b9\u5f0f\u3002\u5f53\u6570\u7ec4\u53d8\u91cf\u7684\u503c\u4e3a null \u65f6\uff0c\u8868\u793a\u8be5\u53d8\u91cf\u4e0d\u5f15\u7528\u4efb\u4f55\u6570\u7ec4\u5bf9\u8c61\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>int[] arr = null;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>int[] arr = new int[0];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava \u6570\u7ec4\u4e3a\u7a7a\u600e\u4e48\u8868\u793a\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>java \u4e2d\u7684\u7a7a\u6570\u7ec4\u53ef\u4ee5\u4f7f\u7528 null \u8868\u793a\uff0c\u8868\u793a\u6570\u7ec4\u53d8\u91cf\u4e0d\u5f15\u7528\u4efb\u4f55\u6570\u7ec4\u5bf9\u8c61\u3002\u53e6\u5916\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 0 \u7684\u6570\u7ec4\u6765\u8868\u793a\u7a7a\u6570\u7ec4\u3002 Java \u4e2d\u8868\u793a\u7a7a\u6570\u7ec4 \u5728 Java \u4e2d\uff0c\u7a7a\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8868\u793a\uff1a null \u8fd9\u662f\u8868\u793a\u7a7a\u6570\u7ec4\u6700\u7b80\u5355\u3001\u6700\u76f4\u63a5\u7684\u65b9\u5f0f\u3002\u5f53\u6570\u7ec4\u53d8\u91cf\u7684\u503c\u4e3a null \u65f6\uff0c\u8868\u793a\u8be5\u53d8\u91cf\u4e0d\u5f15\u7528\u4efb\u4f55\u6570\u7ec4\u5bf9\u8c61\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u793a\u4f8b\uff1a int[] arr = null; \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a int[] arr = new int[0]; \u767b\u5f55\u540e\u590d\u5236 \u4ee5\u4e0a\u5c31\u662fjava \u6570\u7ec4\u4e3a\u7a7a\u600e\u4e48\u8868\u793a\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/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-37092","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37092","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=37092"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/37092\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=37092"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=37092"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=37092"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}