{"id":40256,"date":"2024-11-26T14:43:35","date_gmt":"2024-11-26T06:43:35","guid":{"rendered":"https:\/\/fwq.ai\/blog\/40256\/"},"modified":"2024-11-26T14:43:35","modified_gmt":"2024-11-26T06:43:35","slug":"java%e4%b8%ad%e4%b8%80%e4%b8%b2%e6%95%b0%e6%80%8e%e4%b9%88%e5%bc%84%e6%88%90%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/40256\/","title":{"rendered":"java\u4e2d\u4e00\u4e32\u6570\u600e\u4e48\u5f04\u6210\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  \u6709\u4e09\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5c06 java \u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\u6570\u7ec4\uff1a1. \u4f7f\u7528 split() \u5206\u5272\uff1b2. \u4f7f\u7528 stream.maptoint() \u6620\u5c04\u5e76\u8f6c\u6362\u4e3a intstream\uff1b3. \u89e3\u6790\u5b57\u7b26\u4e32\u5e76\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/18\/2024111814490241598.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u4e00\u4e32\u6570\u600e\u4e48\u5f04\u6210\u6570\u7ec4\u63d2\u56fe\" alt=\"java\u4e2d\u4e00\u4e32\u6570\u600e\u4e48\u5f04\u6210\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5c06 Java \u4e2d\u7684\u4e00\u4e32\u6570\u5b57\u8f6c\u6362\u4e3a\u6570\u7ec4<\/strong><\/p>\n<p>\u8981\u5c06 Java \u4e2d\u7684\u4e00\u4e32\u6570\u5b57\u8f6c\u6362\u4e3a\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<p><strong>1. split() \u65b9\u6cd5<\/strong><\/p>\n<p>\u8be5\u65b9\u6cd5\u4ee5\u5206\u9694\u7b26\uff08\u4f8b\u5982\u9017\u53f7\u6216\u7a7a\u683c\uff09\u4e3a\u754c\uff0c\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u6570\u7ec4\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>String str = \"1,2,3,4,5\";\nString[] arr = str.split(\",\");<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>[1, 2, 3, 4, 5]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. Stream.mapToInt()<\/strong><\/p>\n<p>\u8be5\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6620\u5c04\u4e3a int\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728 IntStream \u4e2d\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06 IntStream \u8f6c\u6362\u4e3a\u6570\u7ec4\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>String str = \"1,2,3,4,5\";\nint[] arr = str.chars()\n        .mapToInt(Character::getNumericValue)\n        .toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>[1, 2, 3, 4, 5]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. <\/strong><\/p>\n<p>\u5bf9\u4e8e\u7b80\u5355\u7684\u6570\u5b57\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528 Integer.parseInt() \u6216 Integer.valueOf() \u65b9\u6cd5\u5c06\u6bcf\u4e2a\u6570\u5b57\u5b57\u7b26\u4e32\u89e3\u6790\u4e3a int\u3002\u7136\u540e\uff0c\u5c06\u89e3\u6790\u540e\u7684\u6570\u5b57\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002<\/p>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>String str = \"12345\";\nint[] arr = new int[str.length()];\nfor (int i = 0; i &lt; arr.length; i++) {\n    arr[i] = Integer.parseInt(str.substring(i, i + 1));\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>[1, 2, 3, 4, 5]<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u4e00\u4e32\u6570\u600e\u4e48\u5f04\u6210\u6570\u7ec4\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>\u6709\u4e09\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5c06 java \u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\u6570\u7ec4\uff1a1. \u4f7f\u7528 split() \u5206\u5272\uff1b2. \u4f7f\u7528 stream.maptoint() \u6620\u5c04\u5e76\u8f6c\u6362\u4e3a intstream\uff1b3. \u89e3\u6790\u5b57\u7b26\u4e32\u5e76\u5b58\u50a8\u5728\u6570\u7ec4\u4e2d\u3002 \u5982\u4f55\u5c06 Java \u4e2d\u7684\u4e00\u4e32\u6570\u5b57\u8f6c\u6362\u4e3a\u6570\u7ec4 \u8981\u5c06 Java \u4e2d\u7684\u4e00\u4e32\u6570\u5b57\u8f6c\u6362\u4e3a\u6570\u7ec4\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a 1. split() \u65b9\u6cd5 \u8be5\u65b9\u6cd5\u4ee5\u5206\u9694\u7b26\uff08\u4f8b\u5982\u9017\u53f7\u6216\u7a7a\u683c\uff09\u4e3a\u754c\uff0c\u5c06\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u6570\u7ec4\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u793a\u4f8b\uff1a String str = &#8220;1,2,3,4,5&#8221;; String[] arr = str.split(&#8220;,&#8221;); \u767b\u5f55\u540e\u590d\u5236 \u8f93\u51fa\uff1a [1, 2, 3, 4, 5] \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 \u767b\u5f55\u540e\u590d\u5236 2. Stream.mapToInt() \u8be5\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6620\u5c04\u4e3a int\uff0c\u5e76\u5c06\u5176\u5b58\u50a8\u5728 IntStream \u4e2d\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06 IntStream \u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 \u793a\u4f8b\uff1a String str = [&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-40256","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40256","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=40256"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/40256\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=40256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=40256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=40256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}