Look at any recent build of the JDK API docs, such as here:
http://download.java.net/java/jdk9/docs/api/index.html

Scroll down the All Classes list to see items beginning Stream.
See this list:

StAXResult
StAXSource
StreamCorruptedException
StreamHandler
StreamPrintService
StreamPrintServiceFactory
StreamReaderDelegate
StreamResult
StreamSource
StreamSupport
StreamTokenizer
StrictMath
String
StringBuffer

Note the absence of Stream itself. It appears lower down, in this group of names:


StateFactory
Statement
StatementEventListener
Stream
Stream.Builder
Streamable
StreamableValue
StreamFilter
StringMonitorMBean



And, you can see the sort error explicitly in this set of names:


SystemColor
SystemException
SystemFlavorMap
SystemSleepEvent
SystemTray
Service.Mode
SignStyle
SOAPBinding.ParameterStyle
SOAPBinding.Style
SOAPBinding.Use
SortOrder

Last time I checked, Service.Mode, SignStyle and so on, should come before SystemTray.