plugin not compatible with java 8

[dnsmkl]

Plugin fails with exception if JRE is 1.8.

Intellij 2020.1.2 Ultimate Edition
google-java-format 1.9.0.0
JRE 1.8

Exception: `java.lang.UnsupportedClassVersionError: com/google/googlejavaformat/intellij/InitialConfigurationProjectManagerListener has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

55 -> java 11
52 -> java 8

Full stack trace:

Cannot create listener

com.intellij.diagnostic.PluginException: Cannot create listener com.google.googlejavaformat.intellij.InitialConfigurationProjectManagerListener [Plugin: google-java-format]
    at com.intellij.serviceContainer.ComponentManagerImpl.createListener(ComponentManagerImpl.kt:716)
    at com.intellij.util.messages.impl.MessageBusImpl.subscribeLazyListeners(MessageBusImpl.java:204)
    at com.intellij.util.messages.impl.MessageBusImpl.calcSubscribers(MessageBusImpl.java:320)
    at com.intellij.util.messages.impl.MessageBusImpl.getTopicSubscribers(MessageBusImpl.java:366)
    at com.intellij.util.messages.impl.MessageBusImpl.postMessage(MessageBusImpl.java:344)
    at com.intellij.util.messages.impl.MessageBusImpl.sendMessage(MessageBusImpl.java:396)
    at com.intellij.util.messages.impl.MessageBusImpl.lambda$createTopicHandler$3(MessageBusImpl.java:237)
    at com.sun.proxy.$Proxy74.projectOpened(Unknown Source)
    at com.intellij.openapi.project.impl.ProjectManagerImpl.fireProjectOpened(ProjectManagerImpl.java:782)
    at com.intellij.openapi.project.impl.ProjectManagerImpl.lambda$doLoadProject$6(ProjectManagerImpl.java:456)
    at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:201)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
    at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeAndWait$8(ApplicationImpl.java:480)
    at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:124)
    at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:80)
    at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:128)
    at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
    at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:184)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:974)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:847)
    at com.intellij.ide.IdeEventQueue.lambda$null$8(IdeEventQueue.java:449)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:730)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496)
    at com.intellij.ide.IdeEventQueue.pumpEventsForHierarchy(IdeEventQueue.java:1030)
    at com.intellij.openapi.progress.util.ProgressWindow.pumpEventsForHierarchy(ProgressWindow.java:199)
    at com.intellij.openapi.progress.util.ProgressWindow.lambda$startBlocking$3(ProgressWindow.java:189)
    at com.intellij.openapi.application.impl.ApplicationImpl.runUnlockingIntendedWrite(ApplicationImpl.java:857)
    at com.intellij.openapi.progress.util.ProgressWindow.startBlocking(ProgressWindow.java:188)
    at com.intellij.openapi.progress.impl.ProgressRunner.lambda$legacyExec$6(ProgressRunner.java:302)
    at java.util.concurrent.CompletableFuture.uniAccept(CompletableFuture.java:656)
    at java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:669)
    at java.util.concurrent.CompletableFuture.thenAccept(CompletableFuture.java:1997)
    at com.intellij.openapi.progress.impl.ProgressRunner.legacyExec(ProgressRunner.java:300)
    at com.intellij.openapi.progress.impl.ProgressRunner.submit(ProgressRunner.java:248)
    at com.intellij.openapi.progress.impl.ProgressRunner.submitAndGet(ProgressRunner.java:169)
    at com.intellij.openapi.application.impl.ApplicationImpl.runProcessWithProgressSynchronously(ApplicationImpl.java:426)
    at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:494)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcessWithProgressSynchronously(ProgressManagerImpl.java:84)
    at com.intellij.platform.ProjectUiFrameAllocator$run$1.run(ProjectFrameAllocator.kt:98)
    at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:201)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
    at com.intellij.openapi.application.impl.ApplicationImpl.lambda$invokeAndWait$8(ApplicationImpl.java:480)
    at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:124)
    at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:80)
    at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:128)
    at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:46)
    at com.intellij.openapi.application.impl.FlushQueue$FlushNow.run(FlushQueue.java:184)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
    at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:974)
    at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:847)
    at com.intellij.ide.IdeEventQueue.lambda$null$8(IdeEventQueue.java:449)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:741)
    at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448)
    at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:831)
    at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: com.intellij.diagnostic.PluginException: While loading class com.google.googlejavaformat.intellij.InitialConfigurationProjectManagerListener: com/google/googlejavaformat/intellij/InitialConfigurationProjectManagerListener has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0 [Plugin: google-java-format]
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:262)
    at com.intellij.ide.plugins.cl.PluginClassLoader.tryLoadingClass(PluginClassLoader.java:205)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:113)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at com.intellij.serviceContainer.ComponentManagerImpl.createListener(ComponentManagerImpl.kt:713)
    ... 77 more
Caused by: java.lang.UnsupportedClassVersionError: com/google/googlejavaformat/intellij/InitialConfigurationProjectManagerListener has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:642)
    at com.intellij.util.lang.UrlClassLoader._defineClass(UrlClassLoader.java:380)
    at com.intellij.util.lang.UrlClassLoader.defineClass(UrlClassLoader.java:376)
    at com.intellij.util.lang.UrlClassLoader._findClass(UrlClassLoader.java:340)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClassInsideSelf(PluginClassLoader.java:259)
    ... 83 more

[Stephan202]

Hi @dnsmkl. This is not a bug; see the version 1.8 release notes.

(Note that the plugin can still format Java 8 code. Just the runtime needs to be Java 11+.)

[plumpy]

I didn't realize IntelliJ actually worked under Java 8 still. Unfortunately, there's no way I know of to mark a plugin as incompatible with Java 8, so there's not much I can do here. You can still manually download version 1.7.0.5 and install that.