文章目錄

• 緣由
• 解決方法
• 參考

緣由

IDEA中build成功，但是automated build失敗

$ ./gradlew> Task :compileJava FAILED Wordle/src/game/ui/WordleFrame.java:60: error: illegal start of expressionvar background = switch (tallyResultOfOneLetter) {^ Wordle/src/game/ui/WordleFrame.java:61: error: : expectedcase EXACT -> COLOR_OF_EXACT;^ Wordle/src/game/ui/WordleFrame.java:62: error: : expectedcase MATCH -> COLOR_OF_MATCH;^ Wordle/src/game/ui/WordleFrame.java:63: error: : expectedcase NO_MATCH -> COLOR_OF_NO_MATCH;^ 4 errorsFAILURE: Build failed with an exception.* What went wrong: Execution failed for task ':compileJava'. > Compilation failed; see the compiler error output for details.* Try: > Run with --stacktrace option to get the stack trace. > Run with --info or --debug option to get more log output. > Run with --scan to get full insights.* Get more help at https://help.gradle.orgBUILD FAILED in 1s 2 actionable tasks: 2 executed

解決方法

后來發現IDEA中用的java JDK是17，而wsl中automated build用的是JDK 11，還沒達到JDK14,所以無法識別14的表達式。

那就在wsl中升級JDK即可。

這里升級到Java17.

具體操作過程：wsl2下Ubuntu 20

首先輸入

sudo apt update

如果ubuntu命令行出現 wsl ubuntu update顯示err: 404 Not Found解決方法，請點擊并且處理完之后再回到本文。

具體升級過程：

第一步：

sudo add-apt-repository ppa:linuxuprising/java

第二步：

sudo apt-get update sudo apt-get install oracle-java17-installer oracle-java17-set-default

結果如下：

$ sudo apt-get install oracle-java17-installer oracle-java17-set-default Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed:gsfonts gsfonts-x11 libxfont1 xfonts-encodings xfonts-utils Suggested packages:binfmt-support visualvm ttf-baekmuk | ttf-unfonts | ttf-unfonts-core ttf-kochi-gothic | ttf-sazanami-gothicttf-kochi-mincho | ttf-sazanami-mincho ttf-arphic-uming firefox | firefox-2 | iceweasel | mozilla-firefox| iceape-browser | mozilla-browser | epiphany-gecko | epiphany-webkit | epiphany-browser | galeon | midbrowser| moblin-web-browser | xulrunner | xulrunner-1.9 | konqueror | chromium-browser | midori | google-chrome The following NEW packages will be installed:gsfonts gsfonts-x11 libxfont1 oracle-java17-installer oracle-java17-set-default xfonts-encodings xfonts-utils 0 upgraded, 7 newly installed, 0 to remove and 1 not upgraded. Need to get 4158 kB of archives. After this operation, 6408 kB of additional disk space will be used. Do you want to continue? [Y/n]

出現的條款，pagedown鍵劃到底下，用上下左右鍵選擇下方的ok

然后按方向鍵選擇yes，按enter回車。

然后就是開始下載

安裝完成之后

azheng@lishizheng:/mnt/e/shizheng_coding/software_design_venkat$ java --version java 17.0.1 2021-10-19 LTS Java(TM) SE Runtime Environment (build 17.0.1+12-LTS-39) Java HotSpot(TM) 64-Bit Server VM (build 17.0.1+12-LTS-39, mixed mode, sharing)

參考

[1]https://github.com/google/google-java-format/issues/535

[2]https://www.debugpoint.com/2021/09/install-java-17-ubuntu-mint/

總結

以上是生活随笔為你收集整理的wsl 或者window terminal 下出现Java 14 switch expressions unrecognized解决方法：升级java jdk到14 or later的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。