## Hierarchy For Package org.apache.lucene.util

Package Hierarchies:
  All Packages

## Class Hierarchy

- java.lang.Object
  - org.apache.lucene.util._TestUtil
  - java.util.AbstractCollection<E> (implements java.util.Collection<E>)
    - java.util.AbstractSet<E> (implements java.util.Set<E>)
      - org.apache.lucene.util.MapBackedSet<E> (implements java.io.Serializable)
  - org.apache.lucene.util.ArrayUtil
  - org.junit.Assert
    - org.apache.lucene.util.LuceneTestCase
  - org.apache.lucene.util.AttributeImpl (implements org.apache.lucene.util.Attribute, java.lang.Cloneable, java.io.Serializable)
  - org.apache.lucene.util.AttributeSource
  - org.apache.lucene.util.AttributeSource.AttributeFactory
  - org.apache.lucene.util.AttributeSource.State (implements java.lang.Cloneable)
  - org.apache.lucene.util.Bits.MatchAllBits (implements org.apache.lucene.util.Bits)
  - org.apache.lucene.util.Bits.MatchNoBits (implements org.apache.lucene.util.Bits)
  - org.apache.lucene.util.BitUtil
  - org.apache.lucene.util.BitVector (implements org.apache.lucene.util.Bits, java.lang.Cloneable)
  - org.apache.lucene.util.ByteBlockPool
  - org.apache.lucene.util.ByteBlockPool.Allocator
    - org.apache.lucene.util.ByteBlockPool.DirectAllocator
    - org.apache.lucene.util.ByteBlockPool.DirectTrackingAllocator
    - org.apache.lucene.util.RecyclingByteBlockAllocator
  - org.apache.lucene.util.BytesRef (implements java.lang.Cloneable, java.lang.Comparable<T>)
  - org.apache.lucene.util.BytesRefHash
  - org.apache.lucene.util.BytesRefHash.BytesStartArray
    - org.apache.lucene.util.BytesRefHash.DirectBytesStartArray
    - org.apache.lucene.util.BytesRefHash.TrackingDirectBytesStartArray
  - org.apache.lucene.util.CharacterUtils
  - org.apache.lucene.util.CharacterUtils.CharacterBuffer
  - org.apache.lucene.util.CharsRef (implements java.lang.CharSequence, java.lang.Cloneable, java.lang.Comparable<T>)
  - org.apache.lucene.util.CloseableThreadLocal<T> (implements java.io.Closeable)
  - org.apache.lucene.util.CodecUtil
  - org.apache.lucene.util.CollectionUtil
  - org.apache.lucene.util.CommandLineUtil
  - org.apache.lucene.util.Constants
  - org.apache.lucene.util.Counter
  - org.apache.lucene.store.DataInput (implements java.lang.Cloneable)
    - org.apache.lucene.util.PagedBytes.PagedBytesDataInput
  - org.apache.lucene.store.DataOutput
    - org.apache.lucene.store.IndexOutput (implements java.io.Closeable)
      - org.apache.lucene.util.ThrottledIndexOutput
    - org.apache.lucene.util.PagedBytes.PagedBytesDataOutput
  - org.apache.lucene.search.DocIdSet
    - org.apache.lucene.util.DocIdBitSet
    - org.apache.lucene.util.FixedBitSet (implements org.apache.lucene.util.Bits)
    - org.apache.lucene.util.OpenBitSet (implements org.apache.lucene.util.Bits, java.lang.Cloneable, java.io.Serializable)
      - org.apache.lucene.util.OpenBitSetDISI
    - org.apache.lucene.util.SortedVIntList
  - org.apache.lucene.search.DocIdSetIterator
    - org.apache.lucene.util.OpenBitSetIterator
  - org.apache.lucene.util.DoubleBarrelLRUCache<K,V>
  - org.apache.lucene.util.DoubleBarrelLRUCache.CloneableKey
  - org.apache.lucene.util.DummyConcurrentLock (implements java.util.concurrent.locks.Lock)
  - org.apache.lucene.util.English
  - org.apache.lucene.util.FieldCacheSanityChecker
  - org.apache.lucene.util.FieldCacheSanityChecker.Insanity
  - org.apache.lucene.util.FieldCacheSanityChecker.InsanityType
  - org.apache.lucene.util.IndexableBinaryStringTools
  - java.io.InputStream (implements java.io.Closeable)
    - org.apache.lucene.util.UnsafeByteArrayInputStream
  - org.apache.lucene.util.IntsRef (implements java.lang.Cloneable, java.lang.Comparable<T>)
  - org.apache.lucene.util.IOUtils
  - org.apache.lucene.util.LineFileDocs (implements java.io.Closeable)
  - org.apache.lucene.util.LuceneJUnitResultFormatter (implements org.apache.tools.ant.taskdefs.optional.junit.JUnitResultFormatter)
  - org.apache.lucene.util.MapOfSets<K,V>
  - org.apache.lucene.util.NamedThreadFactory (implements java.util.concurrent.ThreadFactory)
  - org.apache.lucene.util.NumericUtils
  - org.apache.lucene.util.NumericUtils.IntRangeBuilder
  - org.apache.lucene.util.NumericUtils.LongRangeBuilder
  - java.io.OutputStream (implements java.io.Closeable, java.io.Flushable)
    - org.apache.lucene.util.UnsafeByteArrayOutputStream
  - org.apache.lucene.util.PagedBytes
  - org.apache.lucene.util.PagedBytes.Reader
  - org.apache.lucene.util.Parameter (implements java.io.Serializable)
  - org.apache.lucene.util.PriorityQueue<T>
  - org.apache.tools.ant.ProjectComponent (implements java.lang.Cloneable)
    - org.apache.tools.ant.types.DataType (implements java.lang.Cloneable)
      - org.apache.tools.ant.types.selectors.BaseSelector (implements org.apache.tools.ant.types.selectors.FileSelector)
        - org.apache.tools.ant.types.selectors.BaseExtendSelector (implements org.apache.tools.ant.types.selectors.ExtendFileSelector)
          - org.apache.lucene.util.LuceneJUnitDividingSelector
  - org.apache.lucene.util.RamUsageEstimator
  - java.util.Random (implements java.io.Serializable)
    - org.apache.lucene.util.SmartRandom
  - org.apache.lucene.util.ReaderUtil
  - org.apache.lucene.util.ReaderUtil.Gather
  - org.apache.lucene.util.Rethrow
  - org.apache.lucene.util.RollingBuffer<T>
  - org.apache.lucene.util.RollingCharBuffer
  - org.junit.runner.Runner (implements org.junit.runner.Describable)
    - org.junit.runners.ParentRunner<T> (implements org.junit.runner.manipulation.Filterable, org.junit.runner.manipulation.Sortable)
      - org.junit.runners.BlockJUnit4ClassRunner
        - org.apache.lucene.util.LuceneTestCaseRunner
  - org.apache.lucene.util.ScorerDocQueue
  - org.apache.lucene.util.SetOnce<T>
  - org.apache.lucene.util.SmallFloat
  - org.apache.lucene.util.SorterTemplate
  - org.apache.lucene.util.StoreClassNameRule (implements org.junit.rules.TestRule)
  - org.apache.lucene.util.StringHelper
  - org.apache.lucene.util.StringInterner
    - org.apache.lucene.util.SimpleStringInterner
  - org.apache.lucene.util.SystemPropertiesInvariantRule (implements org.junit.rules.TestRule)
  - org.apache.lucene.util.SystemPropertiesRestoreRule (implements org.junit.rules.TestRule)
  - java.lang.Throwable (implements java.io.Serializable)
    - java.lang.Exception
      - java.io.IOException
        - org.apache.lucene.util.TwoPhaseCommitTool.CommitFailException
        - org.apache.lucene.util.TwoPhaseCommitTool.PrepareCommitFailException
      - java.lang.RuntimeException
        - org.apache.lucene.util.BytesRefHash.MaxBytesLengthExceededException
        - org.apache.lucene.util.SetOnce.AlreadySetException
        - org.apache.lucene.util.ThreadInterruptedException
  - org.apache.lucene.util.ToStringUtils
  - org.apache.lucene.util.TwoPhaseCommitTool
  - org.apache.lucene.util.TwoPhaseCommitTool.TwoPhaseCommitWrapper (implements org.apache.lucene.util.TwoPhaseCommit)
  - org.apache.lucene.util.UncaughtExceptionsRule (implements org.junit.rules.TestRule)
  - org.apache.lucene.util.UncaughtExceptionsRule.UncaughtExceptionEntry
  - org.apache.lucene.util.UnicodeUtil
  - org.apache.lucene.util.UnicodeUtil.UTF16Result
  - org.apache.lucene.util.UnicodeUtil.UTF8Result
  - org.apache.lucene.util.Vint8
  - org.apache.lucene.util.Vint8.Position
  - org.apache.lucene.util.VirtualMethod<C>
  - org.apache.lucene.util.WeakIdentityMap<K,V>

## Interface Hierarchy

- org.apache.lucene.util.Attribute
- org.apache.lucene.util.AttributeReflector
- org.apache.lucene.util.Bits
- org.apache.lucene.util.BytesRefIterator
- org.apache.lucene.util.RollingBuffer.Resettable
- org.apache.lucene.util.TwoPhaseCommit

## Annotation Type Hierarchy

- org.apache.lucene.util.LuceneTestCase.Nightly (implements java.lang.annotation.Annotation)

## Enum Hierarchy

- java.lang.Object
  - java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable)
    - org.apache.lucene.util.RamUsageEstimator.JvmFeature
    - org.apache.lucene.util.Version