{"id":237737,"date":"2022-03-28T16:42:10","date_gmt":"2022-03-28T15:42:10","guid":{"rendered":"https:\/\/blog.jetbrains.com\/idea\/2022\/03\/java-18-features-support\/"},"modified":"2025-09-18T14:53:16","modified_gmt":"2025-09-18T13:53:16","slug":"java-18-features-support","status":"publish","type":"idea","link":"https:\/\/blog.jetbrains.com\/zh-hans\/idea\/2022\/03\/java-18-features-support\/","title":{"rendered":"Java 18 \u529f\u80fd\u652f\u6301"},"content":{"rendered":"\n<p>Java 18 \u73b0\u5df2\u53d1\u5e03\uff0c\u4ece 2022.1 \u7248\u672c\u5f00\u59cb\uff0cIntelliJ IDEA \u5c06\u63d0\u4f9b\u5bf9\u5b83\u7684\u652f\u6301\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5bf9\u4ee3\u7801\u6bb5\u7684\u652f\u6301<\/h2>\n\n\n\n<p>JDK 18&nbsp;<a href=\"https:\/\/openjdk.java.net\/jeps\/413\" target=\"_blank\" rel=\"noopener\">\u5f15\u5165<\/a>\u4e86 JavaDoc \u6807\u51c6 Doclet \u7684&nbsp;<em>@snippet<\/em>&nbsp;\u6807\u8bb0\uff0c\u7528\u4e8e\u7b80\u5316\u5728 API \u6587\u6863\u4e2d\u5305\u542b\u793a\u4f8b\u6e90\u4ee3\u7801\u7684\u64cd\u4f5c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2025\/09\/a04oHNjRZrReq_6CAtYC6Ytz7A8t9d64SCiRVe0hONS1E5kzmuHNqYKvgjEx8z_bKI1YVs8cxYQznh5hUbp9nz_1NrnsLPThWvQR97BbvDfLFde6VHPQxFRq8Wd9KR4gfxm_BZ9p-1.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u5373\u4f7f\u6ca1\u6709\u663e\u5f0f\u5305\u88c5\u5668\uff0c\u4ee3\u7801\u6bb5\u7247\u6bb5\u4ecd\u4f1a\u88ab\u8bc6\u522b\u4e3a Java \u4ee3\u7801\u3002&nbsp;\u4efb\u4f55\u8bed\u8a00\u90fd\u53ef\u4ee5\u88ab\u6307\u5b9a\uff0c\u5e76\u4e14<a href=\"https:\/\/www.jetbrains.com\/help\/idea\/using-language-injections.html\" target=\"_blank\" rel=\"noopener\">\u8bed\u8a00\u6ce8\u5165<\/a>\u529f\u80fd\u4e5f\u9002\u7528\u4e8e\u4ee3\u7801\u6bb5\u3002&nbsp;\u4f8b\u5982\uff0c\u53ef\u5bfc\u822a\u5f15\u7528\u5c06\u9002\u7528\u4e8e\u901a\u8fc7 import \u53ef\u7528\u7684\u6240\u6709\u5143\u7d20\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2025\/09\/jk-rgQkMpAMJ4bjAKjxXakRIBtyenJkoreZk7XqHNN3xzib9AFgO-h8zD-a61djInEIHJFqdEf8LqpcXEPP6LGWyHkgCfShSi3Q8lM_Xu4FBv7jyDXhg0Psox3BPywryeQfnFoLF-1.png\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u6ca1\u6709\u5fc5\u8981\u4f7f\u7528\u7c7b\u7684\u7ed1\u5b9a\u7f16\u5199\u4ee3\u7801\u6bb5\u4e2d\u7684\u6240\u6709\u4ee3\u7801\u3002&nbsp;\u7247\u6bb5\u5c06\u88ab IntelliJ IDEA \u8bc6\u522b\u4e3a\u4e0e JShell \u7247\u6bb5\u7c7b\u4f3c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">switch \u8868\u8fbe\u5f0f\u7684\u6a21\u5f0f\uff1a\u7b2c\u4e8c\u9884\u89c8<\/h2>\n\n\n\n<p>JDK17 \u4e2d\u5f15\u5165\u7684 switch \u8868\u8fbe\u5f0f\u7684\u6a21\u5f0f\u5339\u914d\u89c4\u8303\u73b0\u5df2<a href=\"https:\/\/openjdk.java.net\/jeps\/420\" target=\"_blank\" rel=\"noopener\">\u66f4\u65b0<\/a>\uff0c\u6dfb\u52a0\u4e86 IntelliJ IDEA \u4e2d\u5df2\u7ecf\u652f\u6301\u7684\u4e24\u4e2a\u57fa\u672c\u53d8\u66f4\uff1a<\/p>\n\n\n\n<ul>\n<li>\u4efb\u4f55\u7c7b\u578b\u7684\u6a21\u5f0f\uff08\u5305\u62ec\u53d7\u4fdd\u62a4\u7684\u6a21\u5f0f\uff09\u90fd\u652f\u914d\u7740\u5e38\u91cf case\u3002&nbsp;\u6a21\u5f0f\u548c\u975e\u5e38\u91cf case \u7684\u652f\u914d\u6ca1\u6709\u6539\u53d8\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2025\/09\/7l1b9P_qt5XL8XsHeJIWzwUMtVFQBIR19XN43KNVDjPmnLHHhYUzR-Bd-ZE1VU-VstmjBmuWEQTG5PSzN7EDuougWK1qVYWBmCdfH8zqIcj5Dd8o_fPBO47qF6JJYJ9J2sHll5sF-1.png\" alt=\"\"\/><\/figure>\n\n\n\n<ul>\n<li>\u5bf9\u4e8e\u5bc6\u5c01\u5c42\u6b21\u7ed3\u6784\uff0c\u5b50\u7c7b\u578b\u6709\u65f6\u4e0d\u80fd\u7528\u4e8e\u9009\u62e9\u5668\u7c7b\u578b\uff0c\u6216\u8005\u4e0d\u80fd\u8f6c\u6362\u4e3a\u9009\u62e9\u5668\u7c7b\u578b\u3002&nbsp;\u60a8\u4e0d\u518d\u9700\u8981\u5904\u7406\u8fd9\u4e9b\u5b50\u7c7b\u578b\u6765\u4f7f switch \u8bed\u53e5\u8be6\u5c3d\u65e0\u9057\u3002<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2025\/09\/vghJ66NaVEJK7P1hgC4-dvC0x7CJbc1syZTYHdtV01UeM-TAHWHEZkx6Eo0WDMk_Igy1625JU7GD9LFcuH-BZmkJOHwXfyky4f2LLY5qOnXKcnjp-bebtPyn6ZZPcSOnj6o0dfvq-1.png\" alt=\"\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u5176\u4ed6\u66f4\u65b0<\/h2>\n\n\n\n<p>\u4ece Java 18 \u5f00\u59cb\uff0c\u975e\u9759\u6001\u5185\u90e8\u7c7b\uff08\u65e0\u8bba\u662f\u5426\u533f\u540d\uff09\u5982\u679c\u672a\u4f7f\u7528\u5c31\u4e0d\u4f1a\u6355\u83b7 `<em>this`<\/em>\uff0c\u56e0\u6b64\u68c0\u67e5&nbsp;<em>Cleaner captures object reference<\/em>\uff08\u6e05\u7406\u5668\u6355\u83b7\u5bf9\u8c61\u5f15\u7528\uff09\u5df2\u76f8\u5e94\u66f4\u65b0\u3002&nbsp;\u5b83\u4e0d\u4f1a\u5728\u4ee3\u7801\u4e2d\u89e6\u53d1\u4ee5\u4e0b\u8b66\u544a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2025\/09\/fzcVsW_pWZcMQx7zC9sKSqaQ5bT2JndqYaK3i9ViLj3BbyTwQFedYh330ogdP0IDF8-8GL2_C15Vc4M8mBCJvUMA7Lpn02mgzblhR_YtE4o-mbkqpBmcbrVO7aHFwUIuen4fDZ-1.png\" alt=\"\"\/><figcaption class=\"wp-element-caption\">The inspection: Java | Probable bugs | Cleaner captures object reference<br>\uff08\u68c0\u67e5\uff1aJava | \u53ef\u80fd\u7684\u9519\u8bef | \u6e05\u7406\u5668\u6355\u83b7\u5bf9\u8c61\u5f15\u7528\uff09<\/figcaption><\/figure>\n\n\n\n<p>\u6b64\u5916\uff0c\u5728 JDK18 \u4e2d\uff0c\u9ed8\u8ba4\u5b57\u7b26\u96c6\u73b0\u5728\u662f UTF-8\uff0c\u800c\u4e0d\u662f\u6839\u636e\u5e73\u53f0\u5b58\u5728\u7684\u4e0d\u540c\u9ed8\u8ba4\u5b57\u7b26\u96c6\u3002&nbsp;\u62a5\u544a\u9690\u5f0f\u4f7f\u7528\u5e73\u53f0\u9ed8\u8ba4\u5b57\u7b26\u96c6\u7684\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u8c03\u7528\u7684&nbsp;<em>Implicit platform default charset<\/em>\uff08\u9690\u5f0f\u5e73\u53f0\u9ed8\u8ba4\u5b57\u7b26\u96c6\uff09\u68c0\u67e5\u5df2\u76f8\u5e94\u66f4\u65b0\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u672c\u535a\u6587\u82f1\u6587\u539f\u4f5c\u8005\uff1a<\/p>\n\n\n    <div class=\"about-author \">\n        <div class=\"about-author__box\">\n            <div class=\"row\">\n                <div class=\"about-author__box-img\">\n                    <img decoding=\"async\" src=\"https:\/\/secure.gravatar.com\/avatar\/?s=200&#038;r=g\" width=\"200\" height=\"200\" alt=\"\" loading=\"lazy\"  class=\"avatar avatar-200 wp-user-avatar wp-user-avatar-200 photo avatar-default\">\n                <\/div>\n                <div class=\"about-author__box-text\">\n                                                        <\/div>\n            <\/div>\n        <\/div>\n    <\/div>\n","protected":false},"author":1297,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","categories":[4759,5088],"tags":[6916,155,6961,76],"cross-post-tag":[],"acf":[],"_links":{"self":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/idea\/237737"}],"collection":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/idea"}],"about":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/types\/idea"}],"author":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/users\/1297"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/comments?post=237737"}],"version-history":[{"count":5,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/idea\/237737\/revisions"}],"predecessor-version":[{"id":633158,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/idea\/237737\/revisions\/633158"}],"wp:attachment":[{"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/media?parent=237737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/categories?post=237737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/tags?post=237737"},{"taxonomy":"cross-post-tag","embeddable":true,"href":"https:\/\/blog.jetbrains.com\/zh-hans\/wp-json\/wp\/v2\/cross-post-tag?post=237737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}