org.apache.hadoop.util
Interfaces 
IdentityHashStore.Visitor
IPList
LightWeightCache.Entry
LightWeightGSet.LinkedElement
Progressable
Shell.CommandExecutor
Tool
Classes 
ApplicationClassLoader
CacheableIPList
CloseableReferenceCount
CombinedIPWhiteList
ComparableVersion
FileBasedIPList
LimitInputStream
MachineList
MachineList.InetAddressFactory
Options
Options.BooleanOption
Options.ClassOption
Options.FSDataInputStreamOption
Options.FSDataOutputStreamOption
Options.IntegerOption
Options.LongOption
Options.PathOption
Options.ProgressableOption
Options.StringOption
PerformanceAdvisory
ProtoUtil
PureJavaCrc32
PureJavaCrc32C
ReflectionUtils
Shell.ShellCommandExecutor
ShutdownHookManager
ShutdownThreadsHelper
StringInterner
ThreadUtil
ToolRunner
Waitable
Enums 
DataChecksum.Type
Shell.OSType
StringUtils.TraditionalBinaryPrefix
Exceptions 
DiskChecker.DiskErrorException
DiskChecker.DiskOutOfSpaceException
ExitUtil.ExitException
ExitUtil.HaltException
Shell.ExitCodeException