com.sun.tools.javac.util.MissingPlatformError: Fatal Error: Unable to find package java.lang in classpath or bootclasspath
        at com.sun.tools.javac.comp.MemberEnter.importAll(MemberEnter.java:158)
        at com.sun.tools.javac.comp.MemberEnter.visitTopLevel(MemberEnter.java:557)
        at com.sun.tools.javac.tree.JCTree$JCCompilationUnit.accept(JCTree.java:450)
        at com.sun.tools.javac.comp.MemberEnter.memberEnter(MemberEnter.java:427)
        at com.sun.tools.javac.comp.MemberEnter.complete(MemberEnter.java:968)
        at com.sun.tools.javac.code.Symbol.complete(Symbol.java:405)
        at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(Symbol.java:800)
        at com.sun.tools.javac.comp.Enter.complete(Enter.java:646)
        at com.sun.tools.javac.comp.Enter.main(Enter.java:624)
        at com.sun.tools.javac.main.JavaCompiler.enterTrees(JavaCompiler.java:897)
        at com.sun.tools.javac.api.JavacTaskImpl.enter(JavacTaskImpl.java:367)
        at com.sun.tools.javac.api.JavacTaskImpl.enterTrees(JavacTaskImpl.java:406)
        at org.netbeans.modules.java.source.indexing.OnePassCompileWorker.compile(OnePassCompileWorker.java:169)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:131)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1$1.run(JavaCustomIndexer.java:117)
        at org.netbeans.modules.java.source.tasklist.TaskCache.refreshTransaction(TaskCache.java:464)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:117)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$1.run(JavaCustomIndexer.java:115)
        at org.netbeans.modules.java.source.usages.ClassIndexManager.writeLock(ClassIndexManager.java:100)
        at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.index(JavaCustomIndexer.java:115)
        at org.netbeans.modules.parsing.spi.indexing.Indexable$MyAccessor.index(Indexable.java:141)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.index(RepositoryUpdater.java:659)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.scanSource(RepositoryUpdater.java:1044)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.scanSources(RepositoryUpdater.java:1021)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$RootsWork.getDone(RepositoryUpdater.java:849)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:704)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:1175)
        at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:1150)
        at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:601)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:613)