Table of Contents

出现的错误 

解决办法

出现的错误 

Error:Internal error: (java.lang.IllegalArgumentException) No enum constant org.jetbrains.jps.model.java.LanguageLevel.JDK_1_11
java.lang.IllegalArgumentException: No enum constant org.jetbrains.jps.model.java.LanguageLevel.JDK_1_9
    at java.lang.Enum.valueOf(Enum.java:238)
    at org.jetbrains.jps.model.java.LanguageLevel.valueOf(LanguageLevel.java:21)
    at org.jetbrains.jps.model.serialization.java.JpsJavaModelSerializerExtension$JavaProjectExtensionSerializer.loadExtension(JpsJavaModelSerializerExtension.java:285)
    at org.jetbrains.jps.model.serialization.java.JpsJavaModelSerializerExtension$JavaProjectExtensionSerializer.loadExtension(JpsJavaModelSerializerExtension.java:268)
    at org.jetbrains.jps.model.serialization.JpsLoaderBase.loadComponents(JpsLoaderBase.java:59)
    at org.jetbrains.jps.model.serialization.JpsProjectLoader.a(JpsProjectLoader.java:119)
    at org.jetbrains.jps.model.serialization.JpsProjectLoader.loadProject(JpsProjectLoader.java:98)
    at org.jetbrains.jps.model.serialization.impl.JpsSerializationManagerImpl.loadModel(JpsSerializationManagerImpl.java:41)
    at org.jetbrains.jps.cmdline.JpsModelLoaderImpl.loadModel(JpsModelLoaderImpl.java:45)
    at org.jetbrains.jps.cmdline.BuildRunner.load(BuildRunner.java:71)
    at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:198)
    at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:113)
    at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler$1.run(BuildMain.java:133)
    at org.jetbrains.jps.service.impl.SharedThreadPoolImpl$1.run(SharedThreadPoolImpl.java:41)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

解决办法

在项目下：点击右键——>找到Open Module Settings

（1）检查 project 处是否与自己安装的JDK是否一致

（2） 检查 Model 处是否与自己安装的JDK是否一致

注意，如果model 处有红波浪线，问题就出在此处