{"id":18504,"date":"2023-06-03T01:17:14","date_gmt":"2023-06-02T17:17:14","guid":{"rendered":"https:\/\/www.ruoxue.org\/?p=18504"},"modified":"2023-10-11T22:57:12","modified_gmt":"2023-10-11T14:57:12","slug":"java-147-java-enummap-methods","status":"publish","type":"post","link":"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/","title":{"rendered":"Java EnumMap Methods &#8211; Java 147"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"18504\" class=\"elementor elementor-18504\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5b68fba elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5b68fba\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0cc3f4c\" data-id=\"0cc3f4c\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2a1cbd9 elementor-widget elementor-widget-heading\" data-id=\"2a1cbd9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 25-07-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#Java_EnumMap_Methods\" title=\"Java EnumMap Methods\">Java EnumMap Methods<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#%E6%AA%94%E6%A1%88%E7%9B%AE%E9%8C%84\" title=\"\u6a94\u6848\u76ee\u9304\">\u6a94\u6848\u76ee\u9304<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#%E5%96%AE%E5%85%83%E6%B8%AC%E8%A9%A6\" title=\"\u55ae\u5143\u6e2c\u8a66\">\u55ae\u5143\u6e2c\u8a66<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#Fruit\" title=\"Fruit\">Fruit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#put\" title=\"put\">put<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#putIfAbsent\" title=\"putIfAbsent\">putIfAbsent<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#get\" title=\"get\">get<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#getOrDefault\" title=\"getOrDefault\">getOrDefault<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#update\" title=\"update\">update<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#remove\" title=\"remove\">remove<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#clear\" title=\"clear\">clear<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#size\" title=\"size\">size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#putAll\" title=\"putAll\">putAll<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#isEmpty\" title=\"isEmpty\">isEmpty<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#EnumMapMethodsTestjava\" title=\"EnumMapMethodsTest.java\">EnumMapMethodsTest.java<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#%E5%BF%83%E5%BE%97%E5%88%86%E4%BA%AB\" title=\"\u5fc3\u5f97\u5206\u4eab\">\u5fc3\u5f97\u5206\u4eab<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-methods\/#%E5%8E%9F%E7%A2%BC%E4%B8%8B%E8%BC%89\" title=\"\u539f\u78bc\u4e0b\u8f09\">\u539f\u78bc\u4e0b\u8f09<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Java_EnumMap_Methods\"><\/span>Java EnumMap Methods<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-125eb99 elementor-widget elementor-widget-text-editor\" data-id=\"125eb99\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.23.0 - 25-07-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>\u7576 key \u662f enum \u985e\u5225\uff0c\u53ef\u4ee5\u4f7f\u7528 EnumMap \u4f86\u9032\u884c\u64cd\u4f5c\uff0c\u5167\u90e8\u4ee5\u4e00\u500b\u975e\u5e38\u7dca\u6e4a\u7684\u9663\u5217\u5132\u5b58 value\uff0c\u4e26\u4e14\u6839\u64da enum \u985e\u5225\u7684 key \u76f4\u63a5\u5b9a\u4f4d\u5230\u5167\u90e8\u9663\u5217\u7684\u7d22\u5f15\uff0c\u4e26\u4e0d\u9700\u8981\u8a08\u7b97 hashCode\uff0c\u4e0d\u4f46\u6548\u7387\u6700\u9ad8\uff0c\u800c\u4e14\u6c92\u6709\u984d\u5916\u7684\u7a7a\u9593\u6d6a\u8cbb\uff0c\u4ecb\u7d39\u5e38\u898b\u7684 put \u3001 get \u3001 clear \u3001 size \u7b49\u65b9\u6cd5\uff0c\u5c07\u8cc7\u6599\u5b58\u5132\u5728\u9375\u3001\u503c\u5c0d\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u53e6\u4e00\u7a2e\u985e\u578b\u7684\u7d22\u5f15\u8a2a\u554f\uff0c\u7576\u63d2\u5165\u91cd\u8907\u9375\u6642\uff0c\u6703\u66ff\u63db\u76f8\u61c9\u9375\u7684\u5143\u7d20\uff0c EnumMap Java Methods \u672c\u7bc7\u589e\u52a0\u4e86\u7bc4\u4f8b\uff0c\u4e26\u900f\u904e\u55ae\u5143\u6e2c\u8a66\u4f86\u9a57\u8b49\u7522\u51fa\u7d50\u679c\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-16baa92 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"16baa92\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-f787747\" data-id=\"f787747\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c8ca01c elementor-widget elementor-widget-heading\" data-id=\"c8ca01c\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"%E6%AA%94%E6%A1%88%E7%9B%AE%E9%8C%84\"><\/span>\u6a94\u6848\u76ee\u9304<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f8a9883 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"f8a9883\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>.\/\r\n   +- src\r\n       +- test\r\n       |   +- org\r\n       |       +- ruoxue\r\n       |           +- java_147\r\n       |               +- map\r\n       |                   +- enummap\r\n       |                       +- EnumMapMethodsTest.java   \r\n<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-11971ce elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"11971ce\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a17061f\" data-id=\"a17061f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-29d5bdb elementor-widget elementor-widget-heading\" data-id=\"29d5bdb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"%E5%96%AE%E5%85%83%E6%B8%AC%E8%A9%A6\"><\/span>\u55ae\u5143\u6e2c\u8a66<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4a1ce45 elementor-widget elementor-widget-text-editor\" data-id=\"4a1ce45\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>EnumMap Methods Java \u63d0\u4f9b\u65b0\u589e\u3001\u53d6\u5f97\u3001\u4fee\u6539\u3001\u522a\u9664\u7b49\u64cd\u4f5c Map \u4e2d\u7684\u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-36c263f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"36c263f\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-0b204b1\" data-id=\"0b204b1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-254d9d5 elementor-widget elementor-widget-heading\" data-id=\"254d9d5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Fruit\"><\/span>Fruit<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e215ff4 elementor-widget elementor-widget-text-editor\" data-id=\"e215ff4\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>EnumMap Methods Java \u5efa\u7acb Fruit enum \u985e\u5225\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-932895e elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"932895e\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-java'>\tpublic enum Fruit {\r\n\t\tGRAPE, KIWIFRUIT, LEMON,\r\n\r\n\t\tEMPTY,\r\n\r\n\t\tAPPLE, BANANA, CHERRY\r\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-35221d1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"35221d1\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-28ffeb7\" data-id=\"28ffeb7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2e99e0b elementor-widget elementor-widget-heading\" data-id=\"2e99e0b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"put\"><\/span>put<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-07e87f3 elementor-widget elementor-widget-text-editor\" data-id=\"07e87f3\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u589e\u52a0\u4e09\u500b\u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-30f0325 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"30f0325\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\r\n\tpublic void put() {\r\n\t\tint expectedSize = 3;\r\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\r\n\t\tmap.put(Fruit.GRAPE, 1);\r\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\r\n\t\tmap.put(Fruit.LEMON, 3);\r\n\t\tSystem.out.println(map);\r\n\t\tassertEquals(expectedSize, map.size());\r\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8600946 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"8600946\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>{GRAPE=1, KIWIFRUIT=2, LEMON=3}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-176cdd0 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"176cdd0\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a9bbc80\" data-id=\"a9bbc80\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ed98c6e elementor-widget elementor-widget-heading\" data-id=\"ed98c6e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"putIfAbsent\"><\/span>putIfAbsent<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-99593ca elementor-widget elementor-widget-text-editor\" data-id=\"99593ca\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u7576\u5143\u7d20\u4e0d\u5b58\u5728\u6642\uff0c\u65b0\u589e\u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e6d0068 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"e6d0068\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void putIfAbsent() {\n\t\tint expectedSize = 3;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tInteger put = map.putIfAbsent(Fruit.LEMON, 3);\n\t\tSystem.out.println(put);\n\t\tassertNull(put);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a02f69f elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"a02f69f\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>null\n{GRAPE=1, KIWIFRUIT=2, LEMON=3}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0a7949a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0a7949a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5fd8136\" data-id=\"5fd8136\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5bede57 elementor-widget elementor-widget-heading\" data-id=\"5bede57\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"get\"><\/span>get<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f94380d elementor-widget elementor-widget-text-editor\" data-id=\"f94380d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u53d6\u5f97\u6307\u5b9a Key \u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c38a72c elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"c38a72c\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void get() {\n\t\tInteger expected = 2;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tInteger value = map.get(Fruit.KIWIFRUIT);\n\t\tSystem.out.println(value);\n\t\tassertEquals(expected, value);\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5a515e elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"d5a515e\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>2<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-215ad7a elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"215ad7a\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7fc2783\" data-id=\"7fc2783\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d1f2ed1 elementor-widget elementor-widget-heading\" data-id=\"d1f2ed1\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"getOrDefault\"><\/span>getOrDefault<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7bef99a elementor-widget elementor-widget-text-editor\" data-id=\"7bef99a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u53d6\u5f97\u6307\u5b9a Key \u5143\u7d20\uff0c\u82e5\u4e0d\u5b58\u5728\u50b3\u56de\u9810\u8a2d\u503c\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ded0da elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"7ded0da\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void getOrDefault() {\n\t\tInteger expected = -1;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tInteger value = map.getOrDefault(Fruit.EMPTY, -1);\n\t\tSystem.out.println(value);\n\t\tassertEquals(expected, value);\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ca69079 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"ca69079\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>-1<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1949669 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1949669\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-8aca1e1\" data-id=\"8aca1e1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-90c0da0 elementor-widget elementor-widget-heading\" data-id=\"90c0da0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"update\"><\/span>update<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b49b315 elementor-widget elementor-widget-text-editor\" data-id=\"b49b315\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u66f4\u65b0\u6307\u5b9a Key \u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-762c5aa elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"762c5aa\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void update() {\n\t\tInteger expected = 10;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tSystem.out.println(map);\n\n\t\tInteger put = map.put(Fruit.GRAPE, 10);\n\t\tSystem.out.println(put);\n\t\tassertEquals(1, put.intValue());\n\t\tSystem.out.println(map);\n\t\tassertEquals(expected, map.get(Fruit.GRAPE));\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0728358 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"0728358\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>{GRAPE=1, KIWIFRUIT=2, LEMON=3}\n1\n{GRAPE=10, KIWIFRUIT=2, LEMON=3}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-25e7cc7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"25e7cc7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c2c8bbf\" data-id=\"c2c8bbf\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5a61477 elementor-widget elementor-widget-heading\" data-id=\"5a61477\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"remove\"><\/span>remove<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2697657 elementor-widget elementor-widget-text-editor\" data-id=\"2697657\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u522a\u9664\u6307\u5b9a Key \u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ea013b2 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"ea013b2\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void remove() {\n\t\tint expectedSize = 2;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tmap.remove(Fruit.GRAPE);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a10a5a elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"1a10a5a\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>{KIWIFRUIT=2, LEMON=3}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-93b441b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"93b441b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9c720cb\" data-id=\"9c720cb\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4282549 elementor-widget elementor-widget-heading\" data-id=\"4282549\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"clear\"><\/span>clear<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-765af75 elementor-widget elementor-widget-text-editor\" data-id=\"765af75\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u522a\u9664\u6240\u6709\u5143\u7d20\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fc29979 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"fc29979\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void clear() {\n\t\tint expectedSize = 0;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tmap.clear();\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb45088 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"cb45088\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>{}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-37c7307 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"37c7307\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-a8cdb79\" data-id=\"a8cdb79\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3eb6734 elementor-widget elementor-widget-heading\" data-id=\"3eb6734\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"size\"><\/span>size<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e73080b elementor-widget elementor-widget-text-editor\" data-id=\"e73080b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u5167\u6709\u4e09\u500b\u5143\u7d20\uff0c\u53d6\u5f97\u9577\u5ea6\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c633c8a elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"c633c8a\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void size() {\n\t\tint expectedSize = 3;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tSystem.out.println(map.size());\n\t\tassertEquals(expectedSize, map.size());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae28f51 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"ae28f51\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>3<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ba75084 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ba75084\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7a02ade\" data-id=\"7a02ade\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-034ba18 elementor-widget elementor-widget-heading\" data-id=\"034ba18\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"putAll\"><\/span>putAll<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-587b724 elementor-widget elementor-widget-text-editor\" data-id=\"587b724\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">\u5efa\u7acb\u5169\u500b EnumMap \uff0c\u5167\u5404\u6709\u4e09\u500b\u5143\u7d20\uff0c\u5408\u4f75\u6210\u70ba\u4e00\u500b Map \u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-547aa41 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"547aa41\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void putAll() {\n\t\tint expectedSize = 6;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.APPLE, 1);\n\t\tmap.put(Fruit.BANANA, 2);\n\t\tmap.put(Fruit.CHERRY, 3);\n\n\t\tMap&lt;Fruit, Integer&gt; map2 = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\n\t\tmap.putAll(map2);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-278b8e5 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"278b8e5\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>{GRAPE=1, KIWIFRUIT=2, LEMON=3, APPLE=1, BANANA=2, CHERRY=3}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1a6c469 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1a6c469\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fa15b52\" data-id=\"fa15b52\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8c70bed elementor-widget elementor-widget-heading\" data-id=\"8c70bed\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"isEmpty\"><\/span>isEmpty<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-35682e8 elementor-widget elementor-widget-text-editor\" data-id=\"35682e8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">\u5efa\u7acb\u4e00\u500b EnumMap \uff0c\u6aa2\u67e5\u662f\u5426\u70ba\u7a7a Map \u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d831dc elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"5d831dc\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>\t@Test\n\tpublic void isEmpty() {\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tSystem.out.println(map.isEmpty());\n\t\tassertTrue(map.isEmpty());\n\t\tmap.put(Fruit.GRAPE, 4);\n\t\tmap.put(Fruit.KIWIFRUIT, 5);\n\t\tmap.put(Fruit.LEMON, 6);\n\t\tSystem.out.println(map.isEmpty());\n\t\tassertFalse(map.isEmpty());\n\t}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2516609 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"2516609\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-okaidia' data-show-toolbar='yes'><code class='language-wiki'>true\nfalse<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-588c89b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"588c89b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e24f3db\" data-id=\"e24f3db\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9c000d2 elementor-widget elementor-widget-heading\" data-id=\"9c000d2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"EnumMapMethodsTestjava\"><\/span>EnumMapMethodsTest.java<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7ff7b12 elementor-widget elementor-widget-text-editor\" data-id=\"7ff7b12\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Methods in Java \u65b0\u589e\u55ae\u5143\u6e2c\u8a66\uff0c\u9a57\u8b49 EnumMap Functions in Java \u662f\u5426\u7b26\u5408\u9810\u671f\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c3fff6 elementor-widget elementor-widget-code-block-for-elementor\" data-id=\"0c3fff6\" data-element_type=\"widget\" data-widget_type=\"code-block-for-elementor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<pre class='line-numbers theme-tomorrow-night' data-show-toolbar='yes'><code class='language-java'>package org.ruoxue.java_147.map.enummap;\n\nimport static org.junit.Assert.*;\n\nimport java.util.EnumMap;\nimport java.util.Map;\n\nimport org.junit.Test;\n\npublic class EnumMapMethodsTest {\n\n\tpublic enum Fruit {\n\t\tGRAPE, KIWIFRUIT, LEMON,\n\n\t\tEMPTY,\n\n\t\tAPPLE, BANANA, CHERRY\n\t}\n\n\t@Test\n\tpublic void put() {\n\t\tint expectedSize = 3;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void putIfAbsent() {\n\t\tint expectedSize = 3;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tInteger put = map.putIfAbsent(Fruit.LEMON, 3);\n\t\tSystem.out.println(put);\n\t\tassertNull(put);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void get() {\n\t\tInteger expected = 2;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tInteger value = map.get(Fruit.KIWIFRUIT);\n\t\tSystem.out.println(value);\n\t\tassertEquals(expected, value);\n\t}\n\n\t@Test\n\tpublic void getOrDefault() {\n\t\tInteger expected = -1;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tInteger value = map.getOrDefault(Fruit.EMPTY, -1);\n\t\tSystem.out.println(value);\n\t\tassertEquals(expected, value);\n\t}\n\n\t@Test\n\tpublic void update() {\n\t\tInteger expected = 10;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tSystem.out.println(map);\n\n\t\tInteger put = map.put(Fruit.GRAPE, 10);\n\t\tSystem.out.println(put);\n\t\tassertEquals(1, put.intValue());\n\t\tSystem.out.println(map);\n\t\tassertEquals(expected, map.get(Fruit.GRAPE));\n\t}\n\n\t@Test\n\tpublic void remove() {\n\t\tint expectedSize = 2;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tmap.remove(Fruit.GRAPE);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void clear() {\n\t\tint expectedSize = 0;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tmap.clear();\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void size() {\n\t\tint expectedSize = 3;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\t\tSystem.out.println(map.size());\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void putAll() {\n\t\tint expectedSize = 6;\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.APPLE, 1);\n\t\tmap.put(Fruit.BANANA, 2);\n\t\tmap.put(Fruit.CHERRY, 3);\n\n\t\tMap&lt;Fruit, Integer&gt; map2 = new EnumMap&lt;&gt;(Fruit.class);\n\t\tmap.put(Fruit.GRAPE, 1);\n\t\tmap.put(Fruit.KIWIFRUIT, 2);\n\t\tmap.put(Fruit.LEMON, 3);\n\n\t\tmap.putAll(map2);\n\t\tSystem.out.println(map);\n\t\tassertEquals(expectedSize, map.size());\n\t}\n\n\t@Test\n\tpublic void isEmpty() {\n\t\tMap&lt;Fruit, Integer&gt; map = new EnumMap&lt;&gt;(Fruit.class);\n\t\tSystem.out.println(map.isEmpty());\n\t\tassertTrue(map.isEmpty());\n\t\tmap.put(Fruit.GRAPE, 4);\n\t\tmap.put(Fruit.KIWIFRUIT, 5);\n\t\tmap.put(Fruit.LEMON, 6);\n\t\tSystem.out.println(map.isEmpty());\n\t\tassertFalse(map.isEmpty());\n\t}\n}<\/code><\/pre>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-40e13e6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"40e13e6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cb3c9b1\" data-id=\"cb3c9b1\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4400a84 elementor-widget elementor-widget-heading\" data-id=\"4400a84\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"%E5%BF%83%E5%BE%97%E5%88%86%E4%BA%AB\"><\/span>\u5fc3\u5f97\u5206\u4eab<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d050388 elementor-widget elementor-widget-text-editor\" data-id=\"d050388\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p class=\"p1\">EnumMap Functions in Java \u63d0\u4f9b <span class=\"s1\">enum<\/span> \u985e\u5225\u4f5c\u70ba\u9375\u503c\uff0c\u4e0d\u5141\u8a31\u5132\u5b58\u7a7a\u9375\uff0c\u4f46\u53ef\u4ee5\u5132\u5b58\u7a7a\u503c\uff0c\u719f\u6089 EnumMap Methods in Java \u9019\u4e9b\u65b9\u6cd5\u7684\u64cd\u4f5c\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\uff0c\u5728\u61c9\u7528\u4e0a\u76f8\u7576\u5ee3\u6cdb\u3002<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a0cbe7 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"1a0cbe7\" data-element_type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<link rel=\"stylesheet\" href=\"https:\/\/www.ruoxue.org\/wp-content\/plugins\/elementor\/assets\/css\/widget-icon-list.min.css\">\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.ruoxue.org\/java-147-enummap-in-java-with-examples\/\" target=\"_blank\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-dot-circle\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">EnumMap in Java with Examples<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/www.ruoxue.org\/java-147-java-enummap-class\/\" target=\"_blank\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-dot-circle\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">Java EnumMap Class<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6f38372 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6f38372\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-eb15993\" data-id=\"eb15993\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-131efa7 elementor-widget elementor-widget-heading\" data-id=\"131efa7\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"%E5%8E%9F%E7%A2%BC%E4%B8%8B%E8%BC%89\"><\/span>\u539f\u78bc\u4e0b\u8f09<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4f3bd4 elementor-icon-list--layout-traditional elementor-list-item-link-full_width elementor-widget elementor-widget-icon-list\" data-id=\"b4f3bd4\" data-element_type=\"widget\" data-widget_type=\"icon-list.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<ul class=\"elementor-icon-list-items\">\n\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item\">\n\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/github.com\/ruoxueorg\/java-147\/tree\/main\/src\/test\/java\/org\/ruoxue\/java_147\/map\/enummap\" target=\"_blank\" rel=\"noopener\">\n\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fab fa-github\"><\/i>\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text\">GitHub - ruoxueorg<\/span>\n\t\t\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t\t\t<\/ul>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Java EnumMap Methods \u7576 key \u662f enum \u985e\u5225\uff0c\u53ef\u4ee5\u4f7f\u7528 EnumMap \u4f86\u9032\u884c\u64cd\u4f5c\uff0c\u5167\u90e8\u4ee5\u4e00\u500b\u975e\u5e38\u7dca\u6e4a\u7684\u9663\u5217\u5132\u5b58 value\uff0c\u4e26\u4e14\u6839\u64da enum \u985e\u5225\u7684 key \u76f4\u63a5\u5b9a\u4f4d\u5230\u5167\u90e8\u9663\u5217\u7684\u7d22\u5f15\uff0c\u4e26\u4e0d\u9700\u8981\u8a08\u7b97 hashCode\uff0c\u4e0d\u4f46\u6548\u7387\u6700\u9ad8\uff0c\u800c\u4e14\u6c92\u6709\u984d\u5916\u7684\u7a7a\u9593\u6d6a\u8cbb\uff0c\u4ecb\u7d39\u5e38\u898b\u7684 put \u3001 get \u3001  clear \u3001 size \u7b49\u65b9\u6cd5\uff0c\u5c07\u8cc7\u6599\u5b58\u5132\u5728\u9375\u3001\u503c\u5c0d\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u53e6\u4e00\u7a2e\u985e\u578b\u7684\u7d22\u5f15\u8a2a\u554f\uff0c\u7576\u63d2\u5165\u91cd\u8907\u9375\u6642\uff0c\u6703\u66ff\u63db\u76f8\u61c9\u9375\u7684\u5143\u7d20\uff0c EnumMap Java Methods \u672c\u7bc7\u589e\u52a0\u4e86\u7bc4\u4f8b\uff0c\u4e26\u900f\u904e JUnit 4 \u55ae\u5143\u6e2c\u8a66\u4f86\u9a57\u8b49\u7522\u51fa\u7d50\u679c\u3002<\/p>\n","protected":false},"author":1,"featured_media":18453,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,20,365,361],"tags":[45,315,75,98,102],"class_list":["post-18504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rd","category-java","category-java-enummap","category-java-map","tag-collections","tag-enummap","tag-iterator","tag-loop-map","tag-map","entry","has-media"],"_links":{"self":[{"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/posts\/18504","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/comments?post=18504"}],"version-history":[{"count":1,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/posts\/18504\/revisions"}],"predecessor-version":[{"id":23762,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/posts\/18504\/revisions\/23762"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/media\/18453"}],"wp:attachment":[{"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/media?parent=18504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/categories?post=18504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ruoxue.org\/wp-json\/wp\/v2\/tags?post=18504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}