{"id":66790,"date":"2025-05-03T14:21:43","date_gmt":"2025-05-03T06:21:43","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66790\/"},"modified":"2025-05-03T14:21:43","modified_gmt":"2025-05-03T06:21:43","slug":"java%e6%80%8e%e4%b9%88%e7%bb%99%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e5%88%a4%e7%a9%ba-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66790\/","title":{"rendered":"java\u600e\u4e48\u7ed9\u5b57\u7b26\u4e32\u6570\u7ec4\u5224\u7a7a"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u4f7f\u7528 isempty() \u65b9\u6cd5\u53ef\u5224\u65ad\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de true \u8868\u793a\u6570\u7ec4\u4e3a\u7a7a\uff0c\u5426\u5219\u8fd4\u56de false\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/17\/2024111710041524476.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u7ed9\u5b57\u7b26\u4e32\u6570\u7ec4\u5224\u7a7a\u63d2\u56fe\" alt=\"java\u600e\u4e48\u7ed9\u5b57\u7b26\u4e32\u6570\u7ec4\u5224\u7a7a\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u68c0\u67e5\u662f\u5426\u4e3a\u7a7a<\/strong><\/p>\n<p><strong>\u5feb\u901f\u89e3\u7b54\uff1a<\/strong><\/p>\n<p>\u5224\u65ad\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528 isEmpty() \u65b9\u6cd5\u3002<\/p>\n<p><strong>\u8be6\u7ec6\u89e3\u7b54\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u5143\u7d20\u7684\u5bf9\u8c61\u3002\u8981\u68c0\u67e5\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528 isEmpty() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u5982\u679c\u6570\u7ec4\u4e3a\u7a7a\u5219\u4e3a true\uff0c\u5426\u5219\u4e3a false\u3002<\/p>\n<p>\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>boolean isEmpty()<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>String[] myArray = new String[5];\nboolean isEmpty = myArray.isEmpty();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u6b64\u793a\u4f8b\u4e2d\uff0cisEmpty \u53d8\u91cf\u5c06\u5b58\u50a8 true\uff0c\u56e0\u4e3a\u6570\u7ec4 myArray \u76ee\u524d\u4e0d\u5305\u542b\u4efb\u4f55\u5143\u7d20\u3002<\/p>\n<p><strong>\u6ce8\u610f\u4e8b\u9879\uff1a<\/strong><\/p>\n<ul>\n<li>isEmpty() \u65b9\u6cd5\u4ec5\u68c0\u67e5\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u800c\u4e0d\u68c0\u67e5\u5176\u5143\u7d20\u662f\u5426\u4e3a null\u3002\u8981\u68c0\u67e5\u6570\u7ec4\u5143\u7d20\u662f\u5426\u4e3a null\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.stream(array).allMatch(Objects::nonNull)\u3002<\/li>\n<li>\u5982\u679c\u6570\u7ec4\u4e3a null\uff0cisEmpty() \u65b9\u6cd5\u5c06\u629b\u51fa NullPointerException \u5f02\u5e38\u3002\u8981\u907f\u514d\u6b64\u5f02\u5e38\uff0c\u8bf7\u5728\u4f7f\u7528 isEmpty() \u65b9\u6cd5\u4e4b\u524d\u68c0\u67e5\u6570\u7ec4\u662f\u5426\u4e3a null\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u7ed9\u5224\u7a7a\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>\u5728 java \u4e2d\uff0c\u4f7f\u7528 isempty() \u65b9\u6cd5\u53ef\u5224\u65ad\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de true \u8868\u793a\u6570\u7ec4\u4e3a\u7a7a\uff0c\u5426\u5219\u8fd4\u56de false\u3002 \u5982\u4f55\u5728 Java \u4e2d\u68c0\u67e5\u662f\u5426\u4e3a\u7a7a \u5feb\u901f\u89e3\u7b54\uff1a \u5224\u65ad\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528 isEmpty() \u65b9\u6cd5\u3002 \u8be6\u7ec6\u89e3\u7b54\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u4e00\u4e2a\u5305\u542b\u5b57\u7b26\u4e32\u5143\u7d20\u7684\u5bf9\u8c61\u3002\u8981\u68c0\u67e5\u5b57\u7b26\u4e32\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u53ef\u4ee5\u4f7f\u7528 isEmpty() \u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5e03\u5c14\u503c\uff0c\u5982\u679c\u6570\u7ec4\u4e3a\u7a7a\u5219\u4e3a true\uff0c\u5426\u5219\u4e3a false\u3002 \u8bed\u6cd5\u5982\u4e0b\uff1a boolean isEmpty() \u767b\u5f55\u540e\u590d\u5236 \u793a\u4f8b\uff1a String[] myArray = new String[5]; boolean isEmpty = myArray.isEmpty(); \u767b\u5f55\u540e\u590d\u5236 \u5728\u6b64\u793a\u4f8b\u4e2d\uff0cisEmpty \u53d8\u91cf\u5c06\u5b58\u50a8 true\uff0c\u56e0\u4e3a\u6570\u7ec4 myArray \u76ee\u524d\u4e0d\u5305\u542b\u4efb\u4f55\u5143\u7d20\u3002 \u6ce8\u610f\u4e8b\u9879\uff1a isEmpty() \u65b9\u6cd5\u4ec5\u68c0\u67e5\u6570\u7ec4\u662f\u5426\u4e3a\u7a7a\uff0c\u800c\u4e0d\u68c0\u67e5\u5176\u5143\u7d20\u662f\u5426\u4e3a null\u3002\u8981\u68c0\u67e5\u6570\u7ec4\u5143\u7d20\u662f\u5426\u4e3a null\uff0c\u53ef\u4ee5\u4f7f\u7528 Arrays.stream(array).allMatch(Objects::nonNull)\u3002 \u5982\u679c\u6570\u7ec4\u4e3a null\uff0cisEmpty() \u65b9\u6cd5\u5c06\u629b\u51fa NullPointerException \u5f02\u5e38\u3002\u8981\u907f\u514d\u6b64\u5f02\u5e38\uff0c\u8bf7\u5728\u4f7f\u7528 [&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-66790","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66790","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=66790"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/66790\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=66790"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=66790"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=66790"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}