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