org.apache.hadoop.util
Interfaces 
IndexedSortable
IndexedSorter
Progressable
Tool
Classes 
ChecksumUtil
CyclicIteration
Daemon
DataChecksum
DiskChecker
GenericOptionsParser
GenericsUtil
HeapSort
HostsFileReader
LineReader
LinuxMemoryCalculatorPlugin
LinuxResourceCalculatorPlugin
MemoryCalculatorPlugin
MergeSort
NativeCodeLoader
PlatformName
PrintJarMainClass
PriorityQueue
ProcessTree
ProcfsBasedProcessTree
ProgramDriver
Progress
QueueProcessingStatistics
QuickSort
ReflectionUtils
ResourceCalculatorPlugin
ResourceCalculatorPlugin.ProcResourceValues
RunJar
ServletUtil
Shell
Shell.ShellCommandExecutor
StringUtils
ToolRunner
UTF8ByteArrayUtils
VersionInfo
XMLUtils
Enums 
ProcessTree.Signal
QueueProcessingStatistics.State
StringUtils.TraditionalBinaryPrefix
Exceptions 
DiskChecker.DiskErrorException
DiskChecker.DiskOutOfSpaceException
Shell.ExitCodeException