{"id":34472,"date":"2024-11-26T12:52:02","date_gmt":"2024-11-26T04:52:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/34472\/"},"modified":"2024-11-26T12:52:02","modified_gmt":"2024-11-26T04:52:02","slug":"java%e4%b8%ad%e6%80%8e%e4%b9%88%e6%b7%bb%e5%8a%a0%e9%94%ae%e5%80%bc%e5%af%b9%e8%bf%9b%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/34472\/","title":{"rendered":"Java\u4e2d\u600e\u4e48\u6dfb\u52a0\u952e\u503c\u5bf9\u8fdb\u6570\u7ec4"},"content":{"rendered":"<blockquote><p>\n  java\u6570\u7ec4\u4e0d\u652f\u6301\u76f4\u63a5\u6dfb\u52a0\u952e\u503c\u5bf9\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 map \u63a5\u53e3\u3001\u81ea\u5b9a\u4e49\u5bf9\u8c61\u6216 guava \u5e93\u7684 immutablemap \u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\uff1a\u4f7f\u7528 map \u63a5\u53e3\uff1a\u521b\u5efa map \u5b9e\u4f8b\uff0c\u5c06\u952e\u4e0e\u503c\u5173\u8054\u8d77\u6765\u3002\u4f7f\u7528\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff1a\u521b\u5efa\u5305\u542b\u952e\u548c\u503c\u7684\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002\u4f7f\u7528 guava \u5e93\uff1a\u521b\u5efa immutablemap \u5b9e\u4f8b\uff0c\u7136\u540e\u5c06\u5176\u503c\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/02\/2024110214365295874.jpg\" class=\"aligncenter\" title=\"Java\u4e2d\u600e\u4e48\u6dfb\u52a0\u952e\u503c\u5bf9\u8fdb\u6570\u7ec4\u63d2\u56fe\" alt=\"Java\u4e2d\u600e\u4e48\u6dfb\u52a0\u952e\u503c\u5bf9\u8fdb\u6570\u7ec4\u63d2\u56fe\" \/><\/p>\n<p><strong>Java\u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0<\/strong><\/p>\n<p>Java\u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u3001\u5305\u542b\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u5e8f\u5217\u3002\u800c\u952e\u503c\u5bf9\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u5c06\u4e00\u4e2a\u952e\uff08\u901a\u5e38\u662f\u552f\u4e00\u7684\uff09\u4e0e\u4e00\u4e2a\u76f8\u5173\u7684\u503c\u5173\u8054\u8d77\u6765\u3002\u56e0\u6b64\uff0c\u5728\u4f20\u7edf\u6570\u7ec4\u4e2d\u76f4\u63a5\u6dfb\u52a0\u952e\u503c\u5bf9\u5e76\u4e0d\u5408\u9002\u3002<\/p>\n<p>\u4e0d\u8fc7\uff0c\u6709\u51e0\u79cd\u53d8\u901a\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u952e\u503c\u5bf9\u529f\u80fd\uff1a<\/p>\n<p><strong>1. \u4f7f\u7528Map<\/strong><\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>Java\u4e2d\u7684Map\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u952e\u503c\u5bf9\u7684\u5b9e\u73b0\u3002\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aMap\u5b9e\u4f8b\uff0c\u5c06\u952e\uff08String\u6216\u5176\u4ed6\u5bf9\u8c61\uff09\u4e0e\u503c\uff08\u4efb\u4f55\u5bf9\u8c61\uff09\u5173\u8054\u8d77\u6765\u3002<\/p>\n<pre>Map&lt;String, Integer&gt; myMap = new HashMap&lt;&gt;();\nmyMap.put(\"key1\", 10);\nmyMap.put(\"key2\", 20);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>2. \u4f7f\u7528\u6570\u7ec4\u548c\u81ea\u5b9a\u4e49\u5bf9\u8c61<\/strong><\/p>\n<p>\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff0c\u5176\u4e2d\u5305\u542b\u4e24\u4e2a\u5b57\u6bb5\uff1a\u4e00\u4e2a\u7528\u4f5c\u952e\uff0c\u53e6\u4e00\u4e2a\u7528\u4f5c\u503c\u3002\u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5bf9\u8c61\u6dfb\u52a0\u5230\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre>public class KeyValuePair {\n    private String key;\n    private int value;\n}\n\nKeyValuePair[] myArray = new KeyValuePair[2];\nmyArray[0] = new KeyValuePair(\"key1\", 10);\nmyArray[1] = new KeyValuePair(\"key2\", 20);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>3. \u4f7f\u7528Guava\u5e93<\/strong><\/p>\n<p>Guava\u662f\u4e00\u4e2a\u6d41\u884c\u7684Java\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e2a\u901a\u7528\u7684\u952e\u503c\u5bf9\u5b9e\u73b0\uff0c\u79f0\u4e3aImmutableMap\u3002\u8be5\u7c7b\u521b\u5efa\u4e0d\u53ef\u53d8\u7684\u952e\u503c\u5bf9\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre>import com.google.common.collect.ImmutableMap;\n\nImmutableMap&lt;String, Integer&gt; myMap = ImmutableMap.of(\"key1\", 10, \"key2\", 20);\nInteger[] myArray = myMap.values().toArray(new Integer[0]);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u60a8\u7684\u5177\u4f53\u9700\u6c42\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u5e94\u7528\u7a0b\u5e8f\uff0c\u4f7f\u7528Map\u53ef\u80fd\u662f\u6700\u65b9\u4fbf\u7684\u3002\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u81ea\u5b9a\u4e49\u5bf9\u8c61\u6216Guava\u5e93\u53ef\u4ee5\u63d0\u4f9b\u66f4\u591a\u7075\u6d3b\u6027\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJava\u4e2d\u600e\u4e48\u6dfb\u52a0\u8fdb\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>java\u6570\u7ec4\u4e0d\u652f\u6301\u76f4\u63a5\u6dfb\u52a0\u952e\u503c\u5bf9\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528 map \u63a5\u53e3\u3001\u81ea\u5b9a\u4e49\u5bf9\u8c61\u6216 guava \u5e93\u7684 immutablemap \u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\uff1a\u4f7f\u7528 map \u63a5\u53e3\uff1a\u521b\u5efa map \u5b9e\u4f8b\uff0c\u5c06\u952e\u4e0e\u503c\u5173\u8054\u8d77\u6765\u3002\u4f7f\u7528\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff1a\u521b\u5efa\u5305\u542b\u952e\u548c\u503c\u7684\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u3002\u4f7f\u7528 guava \u5e93\uff1a\u521b\u5efa immutablemap \u5b9e\u4f8b\uff0c\u7136\u540e\u5c06\u5176\u503c\u8f6c\u6362\u4e3a\u6570\u7ec4\u3002 Java\u4e2d\u5411\u6570\u7ec4\u6dfb\u52a0 Java\u4e2d\uff0c\u6570\u7ec4\u662f\u4e00\u4e2a\u56fa\u5b9a\u5927\u5c0f\u3001\u5305\u542b\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u5e8f\u5217\u3002\u800c\u952e\u503c\u5bf9\u662f\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u5c06\u4e00\u4e2a\u952e\uff08\u901a\u5e38\u662f\u552f\u4e00\u7684\uff09\u4e0e\u4e00\u4e2a\u76f8\u5173\u7684\u503c\u5173\u8054\u8d77\u6765\u3002\u56e0\u6b64\uff0c\u5728\u4f20\u7edf\u6570\u7ec4\u4e2d\u76f4\u63a5\u6dfb\u52a0\u952e\u503c\u5bf9\u5e76\u4e0d\u5408\u9002\u3002 \u4e0d\u8fc7\uff0c\u6709\u51e0\u79cd\u53d8\u901a\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u7684\u952e\u503c\u5bf9\u529f\u80fd\uff1a 1. \u4f7f\u7528Map \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b Java\u4e2d\u7684Map\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5b83\u63d0\u4f9b\u4e86\u952e\u503c\u5bf9\u7684\u5b9e\u73b0\u3002\u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2aMap\u5b9e\u4f8b\uff0c\u5c06\u952e\uff08String\u6216\u5176\u4ed6\u5bf9\u8c61\uff09\u4e0e\u503c\uff08\u4efb\u4f55\u5bf9\u8c61\uff09\u5173\u8054\u8d77\u6765\u3002 Map&lt;String, Integer&gt; myMap = new HashMap&lt;&gt;(); myMap.put(&#8220;key1&#8221;, 10); myMap.put(&#8220;key2&#8221;, 20); \u767b\u5f55\u540e\u590d\u5236 2. \u4f7f\u7528\u6570\u7ec4\u548c\u81ea\u5b9a\u4e49\u5bf9\u8c61 \u60a8\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u81ea\u5b9a\u4e49\u5bf9\u8c61\uff0c\u5176\u4e2d\u5305\u542b\u4e24\u4e2a\u5b57\u6bb5\uff1a\u4e00\u4e2a\u7528\u4f5c\u952e\uff0c\u53e6\u4e00\u4e2a\u7528\u4f5c\u503c\u3002\u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5bf9\u8c61\u6dfb\u52a0\u5230\u4e00\u4e2a\u6570\u7ec4\u4e2d\u3002 public class KeyValuePair { private String key; private int value; } KeyValuePair[] myArray = new KeyValuePair[2]; myArray[0] = new [&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-34472","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34472","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=34472"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/34472\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=34472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=34472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=34472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}