opennlp.tools.util Class Hierarchy (Apache OpenNLP Tools 1.9.5 API)
Date: 2026-06-18

# Hierarchy For Package opennlp.tools.util

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - opennlp.tools.util.AbstractEventStream<T> (implements opennlp.tools.util.ObjectStream<T>)
  - java.util.AbstractMap<K,V> (implements java.util.Map<K,V>)
    - java.util.HashMap<K,V> (implements java.lang.Cloneable, java.util.Map<K,V>, java.io.Serializable)
      - java.util.LinkedHashMap<K,V> (implements java.util.Map<K,V>)
        - opennlp.tools.util.Cache<K,V>
  - opennlp.tools.util.AbstractObjectStream<T> (implements opennlp.tools.util.ObjectStream<T>)
  - opennlp.tools.util.BaseToolFactory
  - opennlp.tools.util.CollectionObjectStream<E> (implements opennlp.tools.util.ObjectStream<T>)
  - opennlp.tools.util.FilterObjectStream<S,T> (implements opennlp.tools.util.ObjectStream<T>)
    - opennlp.tools.util.EventTraceStream
    - opennlp.tools.util.ParagraphStream
  - opennlp.tools.util.MarkableFileInputStreamFactory (implements opennlp.tools.util.InputStreamFactory)
  - opennlp.tools.util.MutableInt
  - opennlp.tools.util.ObjectStreamUtils
  - opennlp.tools.util.PlainTextByLineStream (implements opennlp.tools.util.ObjectStream<T>)
  - opennlp.tools.util.ReverseListIterator<T> (implements java.util.Iterator<E>)
  - opennlp.tools.util.Sequence (implements java.lang.Comparable<T>)
  - opennlp.tools.util.Span (implements java.lang.Comparable<T>, java.io.Serializable)
  - opennlp.tools.util.StringList (implements java.lang.Iterable<T>)
  - opennlp.tools.util.StringUtil
  - java.lang.Throwable (implements java.io.Serializable)
    - java.lang.Exception
      - java.io.IOException
        - opennlp.tools.util.InsufficientTrainingDataException
        - opennlp.tools.util.InvalidFormatException
  - opennlp.tools.util.TokenTag
  - opennlp.tools.util.TrainingParameters
  - opennlp.tools.util.Version
  - opennlp.tools.util.XmlUtil

## Interface Hierarchy

- java.lang.AutoCloseable
  - opennlp.tools.util.ObjectStream<T>
- opennlp.tools.util.BeamSearchContextGenerator<T>
- opennlp.tools.util.InputStreamFactory
- java.util.Iterator<E>
  - opennlp.tools.util.ResetableIterator<E>
- opennlp.tools.util.SequenceCodec<T>
- opennlp.tools.util.SequenceValidator<T>

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