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Ubuntu 18.04 下的 NetBeans 10 不再正常工作

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Ubuntu 18.04 下的 NetBeans 10 不再正常工作

最近，尝试在 Ubuntu 18.04 中使用 NetBeans 10，但在启动时显示一条错误消息：

Activation failed: StandardModule:org.netbeans.modules.db jarFile:  
/usr/share/netbeans/10.0/ide/modules/org-netbeans-modules-db.jar:  
java.lang.UnsupportedClassVersionError:   
org/netbeans/lib/ddl/DBConnection 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 54.0

我尝试使用 OpenJDK 8 和 OpenJDK 11 运行 NetBeans，但似乎无法摆脱此错误。我没有找到有用的提示，只是针对旧版本的 NetBeans，而且它们实际上不起作用。

停用相应模块后，NB 启动但在日志中显示“意外异常”：

java.lang.IllegalStateException: 
Cannot call getCompilationUnit() if current phase < JavaSource.Phase.PARSED. 
You must call toPhase(Phase.PARSED) first. 
    at org.netbeans.modules.java.source.parsing.CompilationInfoImpl.getCompilationUnit(Unknown Source) 
    at org.netbeans.api.java.source.CompilationInfo.getCompilationUnit(Unknown Source) 
    at org.netbeans.modules.java.JavaNode$IconTask$SourceIcon$1.run(Unknown Source) 
    at org.netbeans.modules.java.JavaNode$IconTask$SourceIcon$1.run(Unknown Source) 
    at org.netbeans.api.java.source.JavaSource$MultiTask.run(Unknown Source) 
    at org.netbeans.modules.parsing.impl.TaskProcessor.callUserTask(Unknown Source) 
    at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(Unknown Source) 
    at org.netbeans.modules.parsing.api.ParserManager$UserTaskAction.run(Unknown Source) 
    at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(Unknown Source) 
    at org.netbeans.modules.parsing.impl.TaskProcessor$2.call(Unknown Source) 
    at org.netbeans.modules.masterfs.filebasedfs.utils.FileChangedManager.priorityIO(Unknown Source) 
    at org.netbeans.modules.masterfs.providers.ProvidedExtensions.priorityIO(Unknown Source) 
    at org.netbeans.modules.parsing.nb.DataObjectEnvFactory.runPriorityIO(Unknown Source) 
    at org.netbeans.modules.parsing.impl.Utilities.runPriorityIO(Unknown Source) 
    at org.netbeans.modules.parsing.impl.TaskProcessor.runUserTask(Unknown Source) 
    at org.netbeans.modules.parsing.api.ParserManager.parse(Unknown Source) 
    at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(Unknown Source) 
    at org.netbeans.api.java.source.JavaSource.runUserActionTask(Unknown Source) 
    at org.netbeans.modules.java.JavaNode$IconTask$SourceIcon.computeIcon(Unknown Source) 
    at org.netbeans.modules.java.JavaNode$IconTask.run(Unknown Source) 
    at org.openide.util.RequestProcessor$Task.run(Unknown Source) 
    at org.netbeans.modules.openide.util.GlobalLookup.execute(Unknown Source) [catch] 
    at org.openide.util.lookup.Lookups.executeWith(Unknown Source) 
    at org.openide.util.RequestProcessor$Processor.run(Unknown Source)

此异常不同于那个。

最烦人的是，导航器不再工作。后两个错误可能是这些异常的副作用，但我不确定。此错误已报告对于 Debian。

我也试过那安装指南：我已更新JAVA_HOME至/etc/environment

JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64/bin/java"

它效果更好，但我仍然得到很多空指针异常当 NetBeans 解析代码时。

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