{"id":38167,"date":"2024-11-26T17:07:29","date_gmt":"2024-11-26T09:07:29","guid":{"rendered":"https:\/\/fwq.ai\/blog\/38167\/"},"modified":"2024-11-26T17:07:29","modified_gmt":"2024-11-26T09:07:29","slug":"%e6%80%8e%e4%b9%88%e5%b0%86%e5%af%b9%e8%b1%a1%e8%bd%ac%e5%8c%96%e4%b8%ba%e6%95%b0%e7%bb%84-java","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/38167\/","title":{"rendered":"\u600e\u4e48\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4 java"},"content":{"rendered":"<blockquote><p>\n  \u5728 java \u4e2d\u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u7b49\u4e8e\u5bf9\u8c61\u5143\u7d20\u6570\u91cf\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 arrays.aslist() \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5355\u4e2a\u5143\u7d20\u7684\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528 toarray() \u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u5728\u9700\u8981\u81ea\u5b9a\u4e49\u8f6c\u6362\u65f6\uff0c\u4f7f\u7528\u5b9e\u73b0 iterable \u6216 collection \u63a5\u53e3\u7684\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/14\/2024111410062754838.jpg\" class=\"aligncenter\" title=\"\u600e\u4e48\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4 java\u63d2\u56fe\" alt=\"\u600e\u4e48\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4 java\u63d2\u56fe\" \/><\/p>\n<p><strong>\u5982\u4f55\u5728 Java \u4e2d\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4<\/strong><\/p>\n<p>\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4\u662f Java \u4e2d\u4e00\u9879\u5e38\u89c1\u4efb\u52a1\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a<\/p>\n<p><strong>\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 Arrays.copyOf()<\/strong><\/p>\n<p>Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u7b49\u4e8e\u6307\u5b9a\u6570\u7ec4\u4e2d\u5143\u7d20\u6570\u91cf\u7684\u6307\u5b9a\u5bf9\u8c61\u7684\u526f\u672c\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<pre>Object[] array = Arrays.copyOf(object, length);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u5176\u4e2d\uff0cobject \u662f\u8981\u8f6c\u5316\u7684\u5bf9\u8c61\uff0clength \u662f\u8981\u521b\u5efa\u7684\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/p>\n<p><strong>\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 Arrays.asList()<\/strong><\/p>\n<p>Arrays.asList() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u5305\u542b\u5355\u4e2a\u5143\u7d20\u7684\u5217\u8868\uff0c\u8be5\u5143\u7d20\u662f\u6307\u5b9a\u7684\u5bf9\u8c61\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06\u5217\u8868\u8f6c\u5316\u4e3a\u6570\u7ec4\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>Object[] array = Arrays.asList(object).toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668<\/strong><\/p>\n<p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u6765\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0 Iterable \u6216 Collection \u63a5\u53e3\u6765\u5b8c\u6210\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>class MyObject implements Iterable&lt;Integer&gt; {\n\n    private int[] values;\n\n    public MyObject(int... values) {\n        this.values = values;\n    }\n\n    @Override\n    public Iterator&lt;Integer&gt; iterator() {\n        return new Iterator&lt;Integer&gt;() {\n\n            private int index = 0;\n\n            @Override\n            public boolean hasNext() {\n                return index &lt; values.length;\n            }\n\n            @Override\n            public Integer next() {\n                return values[index++];\n            }\n        };\n    }\n}\n\nObject[] array = new MyObject(1, 2, 3).toArray();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u9009\u62e9\u65b9\u6cd5<\/strong><\/p>\n<p>\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5bf9\u8c61\u548c\u6240\u9700\u6570\u7ec4\u7684\u7c7b\u578b\u3002\u5bf9\u4e8e\u7b80\u5355\u5bf9\u8c61\u548c\u56fa\u5b9a\u957f\u5ea6\u6570\u7ec4\uff0cArrays.copyOf() \u65b9\u6cd5\u901a\u5e38\u662f\u6700\u7b80\u5355\u7684\u9009\u62e9\u3002\u5bf9\u4e8e\u9700\u8981\u81ea\u5b9a\u4e49\u8f6c\u6362\u7684\u590d\u6742\u5bf9\u8c61\uff0c\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u53ef\u80fd\u66f4\u5408\u9002\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4 java\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>\u5728 java \u4e2d\u5c06\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6570\u7ec4\u7684\u6b65\u9aa4\u5982\u4e0b\uff1a\u4f7f\u7528 arrays.copyof() \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u7b49\u4e8e\u5bf9\u8c61\u5143\u7d20\u6570\u91cf\u7684\u65b0\u6570\u7ec4\u3002\u4f7f\u7528 arrays.aslist() \u521b\u5efa\u4e00\u4e2a\u5305\u542b\u5355\u4e2a\u5143\u7d20\u7684\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528 toarray() \u65b9\u6cd5\u5c06\u5176\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\u5728\u9700\u8981\u81ea\u5b9a\u4e49\u8f6c\u6362\u65f6\uff0c\u4f7f\u7528\u5b9e\u73b0 iterable \u6216 collection \u63a5\u53e3\u7684\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u3002 \u5982\u4f55\u5728 Java \u4e2d\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4 \u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4\u662f Java \u4e2d\u4e00\u9879\u5e38\u89c1\u4efb\u52a1\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a \u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528 Arrays.copyOf() Arrays.copyOf() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u8be5\u6570\u7ec4\u5305\u542b\u7b49\u4e8e\u6307\u5b9a\u6570\u7ec4\u4e2d\u5143\u7d20\u6570\u91cf\u7684\u6307\u5b9a\u5bf9\u8c61\u7684\u526f\u672c\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Object[] array = Arrays.copyOf(object, length); \u767b\u5f55\u540e\u590d\u5236 \u5176\u4e2d\uff0cobject \u662f\u8981\u8f6c\u5316\u7684\u5bf9\u8c61\uff0clength \u662f\u8981\u521b\u5efa\u7684\u65b0\u6570\u7ec4\u7684\u957f\u5ea6\u3002 \u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528 Arrays.asList() Arrays.asList() \u65b9\u6cd5\u53ef\u4ee5\u521b\u5efa\u5305\u542b\u5355\u4e2a\u5143\u7d20\u7684\u5217\u8868\uff0c\u8be5\u5143\u7d20\u662f\u6307\u5b9a\u7684\u5bf9\u8c61\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528 toArray() \u65b9\u6cd5\u5c06\u5217\u8868\u8f6c\u5316\u4e3a\u6570\u7ec4\u3002\u8bed\u6cd5\u5982\u4e0b\uff1a Object[] array = Arrays.asList(object).toArray(); \u767b\u5f55\u540e\u590d\u5236 \u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668 \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u6765\u5c06\u5bf9\u8c61\u8f6c\u5316\u4e3a\u6570\u7ec4\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0 Iterable \u6216 Collection \u63a5\u53e3\u6765\u5b8c\u6210\u3002\u4f8b\u5982\uff1a class MyObject implements Iterable&lt;Integer&gt; { [&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-38167","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38167","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=38167"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/38167\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=38167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=38167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=38167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}