{"id":65708,"date":"2025-05-03T13:41:59","date_gmt":"2025-05-03T05:41:59","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65708\/"},"modified":"2025-05-03T13:41:59","modified_gmt":"2025-05-03T05:41:59","slug":"java%e6%95%b0%e7%bb%84%e5%85%83%e7%b4%a0-1%e6%80%8e%e4%b9%88%e7%90%86%e8%a7%a3-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65708\/","title":{"rendered":"java\u6570\u7ec4\u5143\u7d20 -1\u600e\u4e48\u7406\u89e3"},"content":{"rendered":"<blockquote><p>\n  java \u6570\u7ec4\u5143\u7d20 -1 \u8868\u793a\u8be5\u5143\u7d20\u901a\u5e38\u672a\u521d\u59cb\u5316\u6216\u4e3a\u7a7a\u3002\u5177\u4f53\u800c\u8a00\uff1ajava \u6570\u7ec4\u5143\u7d20\u7684\u9ed8\u8ba4\u503c\u56e0\u7c7b\u578b\u800c\u5f02\uff1a\u57fa\u672c\u7c7b\u578b\u4e3a 0\uff0c\u5f15\u7528\u7c7b\u578b\u4e3a null\u3002int \u578b\u6570\u7ec4\u5143\u7d20\u672a\u88ab\u663e\u5f0f\u8d4b\u503c\u65f6\uff0c\u9ed8\u8ba4\u503c\u4e3a -1\u3002\u6570\u7ec4\u5143\u7d20\u7684 -1 \u503c\u8868\u793a\u8be5\u5143\u7d20\u4e3a\u7a7a\u6216\u672a\u88ab\u4f7f\u7528\uff0c\u4f46\u5e76\u4e0d\u603b\u662f\u610f\u5473\u7740\u672a\u521d\u59cb\u5316\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111307511869840.jpg\" class=\"aligncenter\" title=\"java\u6570\u7ec4\u5143\u7d20 -1\u600e\u4e48\u7406\u89e3\u63d2\u56fe\" alt=\"java\u6570\u7ec4\u5143\u7d20 -1\u600e\u4e48\u7406\u89e3\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u6570\u7ec4\u5143\u7d20 -1 \u7684\u542b\u4e49<\/strong><\/p>\n<p><strong>\u76f4\u63a5\u56de\u7b54\uff1a<\/strong><\/p>\n<p>Java\u6570\u7ec4\u5143\u7d20\u7684\u503c\u4e3a -1 \u901a\u5e38\u8868\u793a\u8be5\u5143\u7d20\u672a\u88ab\u521d\u59cb\u5316\u6216\u4e3a\u7a7a\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>Java\u6570\u7ec4\u662f\u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\u3002\u5728\u521b\u5efa\u6570\u7ec4\u65f6\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff08\u5982\u5bf9\u8c61\uff09\uff0c\u9ed8\u8ba4\u503c\u4e3a null\uff1b\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\uff08\u5982 int\uff09\uff0c\u9ed8\u8ba4\u503c\u4e3a 0\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5982\u679c\u4e00\u4e2a\u6570\u7ec4\u88ab\u663e\u5f0f\u5730\u521d\u59cb\u5316\uff0c\u4f46\u5143\u7d20\u672a\u88ab\u6307\u5b9a\uff0c\u5219\u8be5\u5143\u7d20\u5c06\u4fdd\u7559\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f 0\uff1b\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f null\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e int \u578b\u6570\u7ec4\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f -1\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u5982\u679c\u4e00\u4e2a int \u578b\u6570\u7ec4\u7684\u5143\u7d20\u88ab\u521d\u59cb\u5316\u4e3a -1\uff0c\u5219\u8868\u660e\u8be5\u5143\u7d20\u5c1a\u672a\u88ab\u663e\u5f0f\u8d4b\u503c\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u503c\u53ef\u4ee5\u968f\u65f6\u66f4\u6539\uff0c\u5305\u62ec\u5c06\u5176\u8bbe\u4e3a -1\u3002\u56e0\u6b64\uff0c-1 \u7684\u5b58\u5728\u5e76\u4e0d\u603b\u662f\u610f\u5473\u7740\u8be5\u5143\u7d20\u672a\u521d\u59cb\u5316\u3002\u7136\u800c\uff0c\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c-1 \u7684\u503c\u8868\u793a\u8be5\u5143\u7d20\u4e3a\u7a7a\u6216\u672a\u88ab\u4f7f\u7528\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>int[] myArray = new int[5]; \/\/ \u6bcf\u4e2a\u5143\u7d20\u9ed8\u8ba4\u503c\u4e3a 0\nmyArray[2] = -1; \/\/ \u660e\u786e\u5c06\u5143\u7d20 2 \u7684\u503c\u8bbe\u4e3a -1<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0cmyArray \u7684\u5143\u7d20 2 \u88ab\u660e\u786e\u5730\u8bbe\u4e3a -1\uff0c\u8868\u793a\u8be5\u5143\u7d20\u4e3a\u7a7a\u6216\u672a\u88ab\u4f7f\u7528\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u6570\u7ec4\u5143\u7d20 -1\u600e\u4e48\u7406\u89e3\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\u5143\u7d20 -1 \u8868\u793a\u8be5\u5143\u7d20\u901a\u5e38\u672a\u521d\u59cb\u5316\u6216\u4e3a\u7a7a\u3002\u5177\u4f53\u800c\u8a00\uff1ajava \u6570\u7ec4\u5143\u7d20\u7684\u9ed8\u8ba4\u503c\u56e0\u7c7b\u578b\u800c\u5f02\uff1a\u57fa\u672c\u7c7b\u578b\u4e3a 0\uff0c\u5f15\u7528\u7c7b\u578b\u4e3a null\u3002int \u578b\u6570\u7ec4\u5143\u7d20\u672a\u88ab\u663e\u5f0f\u8d4b\u503c\u65f6\uff0c\u9ed8\u8ba4\u503c\u4e3a -1\u3002\u6570\u7ec4\u5143\u7d20\u7684 -1 \u503c\u8868\u793a\u8be5\u5143\u7d20\u4e3a\u7a7a\u6216\u672a\u88ab\u4f7f\u7528\uff0c\u4f46\u5e76\u4e0d\u603b\u662f\u610f\u5473\u7740\u672a\u521d\u59cb\u5316\u3002 Java\u6570\u7ec4\u5143\u7d20 -1 \u7684\u542b\u4e49 \u76f4\u63a5\u56de\u7b54\uff1a Java\u6570\u7ec4\u5143\u7d20\u7684\u503c\u4e3a -1 \u901a\u5e38\u8868\u793a\u8be5\u5143\u7d20\u672a\u88ab\u521d\u59cb\u5316\u6216\u4e3a\u7a7a\u3002 \u8be6\u7ec6\u89e3\u7b54\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Java\u6570\u7ec4\u662f\u5bf9\u8c61\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\u3002\u5728\u521b\u5efa\u6570\u7ec4\u65f6\uff0c\u6bcf\u4e2a\u5143\u7d20\u90fd\u4f1a\u5206\u914d\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff08\u5982\u5bf9\u8c61\uff09\uff0c\u9ed8\u8ba4\u503c\u4e3a null\uff1b\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\uff08\u5982 int\uff09\uff0c\u9ed8\u8ba4\u503c\u4e3a 0\u3002 \u7136\u800c\uff0c\u5982\u679c\u4e00\u4e2a\u6570\u7ec4\u88ab\u663e\u5f0f\u5730\u521d\u59cb\u5316\uff0c\u4f46\u5143\u7d20\u672a\u88ab\u6307\u5b9a\uff0c\u5219\u8be5\u5143\u7d20\u5c06\u4fdd\u7559\u9ed8\u8ba4\u503c\u3002\u5bf9\u4e8e\u57fa\u672c\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f 0\uff1b\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f null\u3002\u4f46\u662f\uff0c\u5bf9\u4e8e int \u578b\u6570\u7ec4\uff0c\u9ed8\u8ba4\u503c\u5c06\u662f -1\u3002 \u56e0\u6b64\uff0c\u5982\u679c\u4e00\u4e2a int \u578b\u6570\u7ec4\u7684\u5143\u7d20\u88ab\u521d\u59cb\u5316\u4e3a -1\uff0c\u5219\u8868\u660e\u8be5\u5143\u7d20\u5c1a\u672a\u88ab\u663e\u5f0f\u8d4b\u503c\u3002 \u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u6570\u7ec4\u5143\u7d20\u7684\u503c\u53ef\u4ee5\u968f\u65f6\u66f4\u6539\uff0c\u5305\u62ec\u5c06\u5176\u8bbe\u4e3a -1\u3002\u56e0\u6b64\uff0c-1 \u7684\u5b58\u5728\u5e76\u4e0d\u603b\u662f\u610f\u5473\u7740\u8be5\u5143\u7d20\u672a\u521d\u59cb\u5316\u3002\u7136\u800c\uff0c\u5728\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c-1 \u7684\u503c\u8868\u793a\u8be5\u5143\u7d20\u4e3a\u7a7a\u6216\u672a\u88ab\u4f7f\u7528\u3002 \u793a\u4f8b\uff1a int[] myArray = new int[5]; \/\/ \u6bcf\u4e2a\u5143\u7d20\u9ed8\u8ba4\u503c\u4e3a 0 myArray[2] = -1; \/\/ \u660e\u786e\u5c06\u5143\u7d20 2 \u7684\u503c\u8bbe\u4e3a -1 [&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-65708","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65708","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=65708"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65708\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}