{"id":31587,"date":"2023-09-13T07:11:05","date_gmt":"2023-01-24T19:53:09","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8map-2\/"},"modified":"2024-05-03T23:31:49","modified_gmt":"2024-05-03T15:31:49","slug":"%e3%80%90java%e3%80%91%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8map-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8map-2\/","title":{"rendered":"\u3010Java\u3011\u5982\u4f55\u4f7f\u7528Map"},"content":{"rendered":"<h3>\u521d\u59cb\u5316<\/h3>\n<p>\u7531\u4e8eMap\u65e0\u6cd5\u6307\u5b9a\u539f\u59cb\u7c7b\u578b\uff0c\u56e0\u6b64\u9700\u8981\u6307\u5b9a\u5305\u88c5\u7c7b\uff0c\u4f8b\u5982Integer\u6216String\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nc\">Map<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span><span class=\"o\">&gt;<\/span> <span class=\"n\">map1<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">HashMap<\/span><span class=\"o\">&lt;<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">,<\/span> <span class=\"nc\">String<\/span><span class=\"o\">&gt;();<\/span> \r\n<\/code><\/pre>\n<h3>\u6dfb\u52a0\u8981\u7d20<\/h3>\n<p>\u5c06\u5bf9\u8c61\u540d.put(\u952e, &#8220;\u503c&#8221;)<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n<\/code><\/pre>\n<h3>\u83b7\u53d6\u8981\u7d20<\/h3>\n<p>\u83b7\u53d6\u5bf9\u8c61\u540d\u4e2d\u7684\u952e\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f\"cherry\"\u306b\u306a\u308b<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u203b\u5982\u679c\u952e\u91cd\u590d<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">));<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f\"cherry\"\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<p>Map\u5185\u7684\u5143\u7d20\u901a\u8fc7\u952e\u6765\u7ba1\u7406\u503c\uff0c\u56e0\u6b64\u4e0d\u80fd\u6709\u91cd\u590d\u3002<br \/>\n\u5f53\u4f7f\u7528put\u65b9\u6cd5\u5c06\u503c\u653e\u5165\u91cd\u590d\u7684\u952e\u65f6\uff0c\u4ee5\u524d\u7684\u503c\u4f1a\u88ab\u66ff\u4ee3\u3002<\/p>\n<h3>\u5220\u9664\u8981\u7d20<\/h3>\n<p>\u5982\u679c\u8981\u5220\u9664\u4e00\u4e2a\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528&#8221;\u5bf9\u8c61\u540d.remove(\u952e)&#8221;\u8fd9\u4e2a\u65b9\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">remove<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f{2=orange, 3=cherry}\u3068\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<p>\u5982\u679c\u8981\u5b8c\u5168\u5220\u9664\uff0c\u53ef\u4ee5\u4f7f\u7528\u5bf9\u8c61\u540d.clear()\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">clear<\/span><span class=\"o\">();<\/span>\r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">);<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f\uff5b\uff5d\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<h3>\u8981\u7d20\u7684\u66ff\u6362<\/h3>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">replace<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"banana\"<\/span><span class=\"o\">);<\/span>\r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">get<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">));<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306fbanana\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<h3>\u83b7\u53d6\u5bc6\u94a5<\/h3>\n<p>\u8fd4\u56de\u5728map\u4e2d\u5b58\u5728\u7684\u952e\u7684\u5bf9\u8c61\u540d\u79f0.keySet()<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">());<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f[1, 2, 3]\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<h3>\u83b7\u53d6\u952e\u7684\u6570\u91cf<\/h3>\n<p>\u8fd4\u56demap\u4e2d\u5b58\u5728\u7684\u952e\u7684\u6570\u91cf\u3002<br \/>\n\u5bf9\u8c61\u540d.keySet()<\/p>\n<pre class=\"post-pre\"><code><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">1<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"apple\"<\/span><span class=\"o\">);<\/span> \r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">2<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"orange\"<\/span><span class=\"o\">);<\/span>\r\n<span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">put<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">,<\/span> <span class=\"s\">\"cherry\"<\/span><span class=\"o\">);<\/span> \r\n\r\n\r\n<span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">map1<\/span><span class=\"o\">.<\/span><span class=\"na\">size<\/span><span class=\"o\">());<\/span>\r\n<span class=\"c1\">\/\/\u51fa\u529b\u7d50\u679c\u306f3\u306b\u306a\u308b<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u521d\u59cb\u5316 \u7531\u4e8eMap\u65e0\u6cd5\u6307\u5b9a\u539f\u59cb\u7c7b\u578b\uff0c\u56e0\u6b64\u9700\u8981\u6307\u5b9a\u5305\u88c5\u7c7b\uff0c\u4f8b\u5982Integer\u6216String\u3002 Map&lt;In [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31587","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u3010Java\u3011\u5982\u4f55\u4f7f\u7528Map - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u5982\u4f55\u4f7f\u7528map-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011\u5982\u4f55\u4f7f\u7528Map\" \/>\n<meta property=\"og:description\" content=\"\u521d\u59cb\u5316 \u7531\u4e8eMap\u65e0\u6cd5\u6307\u5b9a\u539f\u59cb\u7c7b\u578b\uff0c\u56e0\u6b64\u9700\u8981\u6307\u5b9a\u5305\u88c5\u7c7b\uff0c\u4f8b\u5982Integer\u6216String\u3002 Map&lt;In [&hellip;]\" \/>\n<meta property=\"og:url\" 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