{"id":65442,"date":"2025-05-03T09:49:29","date_gmt":"2025-05-03T01:49:29","guid":{"rendered":"https:\/\/fwq.ai\/blog\/65442\/"},"modified":"2025-05-03T09:49:29","modified_gmt":"2025-05-03T01:49:29","slug":"java%e4%b8%ad%e5%ad%97%e7%ac%a6%e6%95%b0%e7%bb%84%e6%80%8e%e4%b9%88%e5%ae%9a%e4%b9%89","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/65442\/","title":{"rendered":"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\uff0c\u5b57\u7b26\u6570\u7ec4\u53ef\u901a\u8fc7 char[] arrayname = new char[length] \u5b9a\u4e49\uff0c\u5176\u4e2d arrayname \u662f\u6570\u7ec4\u540d\u79f0\uff0clength \u662f\u5143\u7d20\u6570\u91cf\u3002\u53ef\u4f7f\u7528\u7d22\u5f15\u53f7\u8bbf\u95ee\u5143\u7d20\uff0c\u4ece 0 \u5f00\u59cb\u3002\u5728\u521b\u5efa\u65f6\u53ef\u8fdb\u884c\u5143\u7d20\u521d\u59cb\u5316\u3002\u6570\u7ec4\u957f\u5ea6\u53ef\u901a\u8fc7 length \u5b57\u6bb5\u83b7\u53d6\u3002\u53ef\u4ee5\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/13\/2024111301042933592.jpg\" class=\"aligncenter\" title=\"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\u63d2\u56fe\" alt=\"java\u4e2d\u5b57\u7b26\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u5b9a\u4e49<\/strong><\/p>\n<p><strong>\u5b9a\u4e49\u8bed\u6cd5\uff1a<\/strong><\/p>\n<pre>char[] arrayName = new char[length];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>arrayName \u662f\u5b57\u7b26\u6570\u7ec4\u7684\u540d\u79f0\u3002<\/li>\n<li>length \u662f\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002<\/li>\n<\/ul>\n<p><strong>\u793a\u4f8b\uff1a<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>char[] myCharArray = new char[10];<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 10 \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u540d\u4e3a myCharArray\u3002<\/p>\n<p><strong>\u6570\u7ec4\u5143\u7d20\u7684\u8bbf\u95ee\uff1a<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u53f7\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u7d22\u5f15\u53f7\u4ece 0 \u5f00\u59cb\uff0c\u56e0\u6b64\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u53f7\u662f 0\uff0c\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u53f7\u662f length &#8211; 1\u3002<\/p>\n<pre>myCharArray[0] = 'a';\nmyCharArray[1] = 'b';<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06 myCharArray \u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e3a &#8216;a&#8217;\uff0c\u7b2c\u4e8c\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e3a &#8216;b&#8217;\u3002<\/p>\n<p><strong>\u6570\u7ec4\u5143\u7d20\u7684\u521d\u59cb\u5316\uff1a<\/strong><\/p>\n<p>\u5728\u521b\u5efa\u6570\u7ec4\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u521d\u59cb\u5316\u8bed\u6cd5\u6765\u521d\u59cb\u5316\u6570\u7ec4\u5143\u7d20\u3002<\/p>\n<pre>char[] myCharArray = { 'a', 'b', 'c', 'd' };<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 4 \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u5176\u4e2d\u5143\u7d20\u5206\u522b\u521d\u59cb\u5316\u4e3a &#8216;a&#8217;\u3001&#8217;b&#8217;\u3001&#8217;c&#8217; \u548c &#8216;d&#8217;\u3002<\/p>\n<p><strong>\u6570\u7ec4\u7684\u957f\u5ea6\uff1a<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 length \u5b57\u6bb5\u6765\u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n<pre>int length = myCharArray.length;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u5c06\u628a myCharArray \u6570\u7ec4\u7684\u957f\u5ea6\u5206\u914d\u7ed9 length \u53d8\u91cf\u3002<\/p>\n<p><strong>\u6570\u7ec4\u7684\u590d\u5236\uff1a<\/strong><\/p>\n<p>\u53ef\u4ee5\u4f7f\u7528 System.arraycopy() \u65b9\u6cd5\u6765\u590d\u5236\u5b57\u7b26\u6570\u7ec4\u3002<\/p>\n<pre>char[] copy = new char[myCharArray.length];\nSystem.arraycopy(myCharArray, 0, copy, 0, myCharArray.length);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u8fd9\u4f1a\u5c06 myCharArray \u6570\u7ec4\u7684\u5185\u5bb9\u590d\u5236\u5230 copy \u6570\u7ec4\u4e2d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u4e2d\u5b57\u7b26\u6570\u7ec4\u600e\u4e48\u5b9a\u4e49\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\u5b57\u7b26\u6570\u7ec4\u53ef\u901a\u8fc7 char[] arrayname = new char[length] \u5b9a\u4e49\uff0c\u5176\u4e2d arrayname \u662f\u6570\u7ec4\u540d\u79f0\uff0clength \u662f\u5143\u7d20\u6570\u91cf\u3002\u53ef\u4f7f\u7528\u7d22\u5f15\u53f7\u8bbf\u95ee\u5143\u7d20\uff0c\u4ece 0 \u5f00\u59cb\u3002\u5728\u521b\u5efa\u65f6\u53ef\u8fdb\u884c\u5143\u7d20\u521d\u59cb\u5316\u3002\u6570\u7ec4\u957f\u5ea6\u53ef\u901a\u8fc7 length \u5b57\u6bb5\u83b7\u53d6\u3002\u53ef\u4ee5\u4f7f\u7528 system.arraycopy() \u65b9\u6cd5\u590d\u5236\u6570\u7ec4\u3002 Java \u4e2d\u5b57\u7b26\u6570\u7ec4\u7684\u5b9a\u4e49 \u5b9a\u4e49\u8bed\u6cd5\uff1a char[] arrayName = new char[length]; \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff1a arrayName \u662f\u5b57\u7b26\u6570\u7ec4\u7684\u540d\u79f0\u3002 length \u662f\u6570\u7ec4\u4e2d\u5143\u7d20\u7684\u6570\u91cf\u3002 \u793a\u4f8b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b char[] myCharArray = new char[10]; \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a 10 \u7684\u5b57\u7b26\u6570\u7ec4\uff0c\u540d\u4e3a myCharArray\u3002 \u6570\u7ec4\u5143\u7d20\u7684\u8bbf\u95ee\uff1a \u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u53f7\u6765\u8bbf\u95ee\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u3002\u7d22\u5f15\u53f7\u4ece 0 \u5f00\u59cb\uff0c\u56e0\u6b64\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u53f7\u662f 0\uff0c\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u53f7\u662f length &#8211; 1\u3002 myCharArray[0] = &#8216;a&#8217;; [&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-65442","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65442","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=65442"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/65442\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=65442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=65442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=65442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}