https:\/\/youtrack.jetbrains.com\/issue\/IDEA-346717\/Decompiler-fails-to-decompile-switch-statements-containing-static-method-calls<\/a>\uff09\uff0c\u4e0d\u8fc7\u4e00\u5468\u8fc7\u53bb\u4e86\u597d\u50cf\u4e5f\u6ca1\u6709\u56de\u5e94\uff0c\u5e72\u8106\u81ea\u5df1\u7814\u7a76\u4e00\u4e0b\u3002<\/p>\n\u6d4b\u8bd5\u7528\u4f8b\uff1a<\/p>\n
\r\npublic class A {\r\n public static void main(String[] args) {\r\n a();\r\n b();\r\n c();\r\n }\r\n\r\n public static void a() {\r\n switch (aa()) {\r\n case \"1\":\r\n System.out.println(\"a\");\r\n break;\r\n case \"2\":\r\n System.out.println(\"b\");\r\n break;\r\n }\r\n }\r\n\r\n public static String aa() {\r\n return \"1\";\r\n }\r\n\r\n public static void b() {\r\n switch (bb()) {\r\n case 1:\r\n System.out.println(\"a\");\r\n break;\r\n case 2:\r\n System.out.println(\"b\");\r\n break;\r\n }\r\n }\r\n\r\n public static int bb() {\r\n return 1;\r\n }\r\n\r\n public static void c() {\r\n switch (new A().cc()) {\r\n case 1:\r\n System.out.println(\"a\");\r\n break;\r\n case 2:\r\n System.out.println(\"b\");\r\n break;\r\n }\r\n }\r\n\r\n public int cc() {\r\n return 1;\r\n }\r\n}\r\n<\/pre>\n\u5176\u4e2d\uff0ca()\u548cc()\u80fd\u591f\u6b63\u5e38\u53cd\u7f16\u8bd1\uff0c\u800cb()\u4e0d\u884c\u3002\u53d1\u73b0\u662f\u8c03\u7528\u9759\u6001\u65b9\u6cd5\u5bfc\u81f4\u7684\u3002<\/p>\n
\u5728Fernflower\u4e2d\uff0c\u5982\u679c\u662f\u9759\u6001\u8c03\u7528\uff0c\u90a3\u4e48InvocationExprent\u7684instance\u6210\u5458\u53d8\u91cf\u4e3anull\uff08InvocationExprent.java:121\uff09\uff1a<\/p>\n
\r\nelse if (opcode == CodeConstants.opc_invokestatic) {\r\n isStatic = true;\r\n}\r\nelse {\r\n instance = stack.pop();\r\n}\r\n<\/pre>\n\u800c\u5728\u5904\u7406switch\u65f6\uff0c\u4f1a\u83b7\u53d6InvocationExprent\u7684instance\u6210\u5458\u7684type\u6210\u5458\uff08SwitchHelper.java:427\uff09\uff1a<\/p>\n
\r\nif (switchSelector.getInstance().type != Exprent.EXPRENT_VAR) return null;\r\n<\/pre>\n\u6b64\u65f6\uff0c\u5982\u679cinstance\u662fnull\uff0c\u5c31\u4f1a\u62a5\u9519\u3002\u89e3\u51b3\u65b9\u6cd5\u4e3a\u76f4\u63a5\u5148\u5728\u524d\u9762\u5224\u65adinstance\u662f\u5426\u4e3anull\uff1a<\/p>\n
\r\nif (switchSelector.getInstance() == null || switchSelector.getInstance().type != Exprent.EXPRENT_VAR) return null;\r\n<\/pre>\n\u63d0\u4ea4\u4e86\u4e00\u4e2aPR\uff0c\u76ee\u524d\u5df2\u4fee\u590d\uff08\u5c31\u662f\u4e0d\u77e5\u9053\u4ec0\u4e48\u65f6\u5019release\u65b0\u7248\u672c\uff09\uff1ahttps:\/\/github.com\/JetBrains\/intellij-community\/pull\/2688<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[24,6],"tags":[],"class_list":["post-893","post","type-post","status-publish","format-standard","hentry","category-24","category-6"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"h4ckm310n","author_link":"https:\/\/h4ckm310n.com\/?author=1"},"uagb_comment_info":0,"uagb_excerpt":null,"_links":{"self":[{"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/posts\/893","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=893"}],"version-history":[{"count":5,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/posts\/893\/revisions"}],"predecessor-version":[{"id":906,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=\/wp\/v2\/posts\/893\/revisions\/906"}],"wp:attachment":[{"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=893"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=893"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/h4ckm310n.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=893"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}