ChunkSample (Apache OpenNLP Tools 1.9.5 API)
Date: 2026-06-18

opennlp.tools.chunker

## Class ChunkSample

- java.lang.Object
- - opennlp.tools.chunker.ChunkSample

- All Implemented Interfaces:
    Serializable

      public class ChunkSample
      extends Object
      implements Serializable

  Class for holding chunks for a single unit of text.
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `ChunkSample(List<String> sentence, List<String> tags, List<String> preds)` Initializes the current instance.
    `ChunkSample(String[] sentence, String[] tags, String[] preds)` Initializes the current instance.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `boolean` | `equals(Object obj)`
    `Span[]` | `getPhrasesAsSpanList()` Gets the phrases as an array of spans
    `String[]` | `getPreds()` Gets the Chunk tags in B-* I-* notation
    `String[]` | `getSentence()` Gets the training sentence
    `String[]` | `getTags()` Gets the POS Tags for the sentence
    `int` | `hashCode()`
    `String` | `nicePrint()` Creates a nice to read string for the phrases formatted as following: `[NP Rockwell_NNP ] [VP said_VBD ] [NP the_DT agreement_NN ] [VP calls_VBZ ] [SBAR for_IN ] [NP it_PRP ] [VP to_TO supply_VB ] [NP 200_CD additional_JJ so-called_JJ shipsets_NNS ] [PP for_IN ] [NP the_DT planes_NNS ] ._.`
    `static Span[]` | `phrasesAsSpanList(String[] aSentence, String[] aTags, String[] aPreds)` Static method to create arrays of spans of phrases
    `String` | `toString()`

    - ### Methods inherited from class java.lang.Object

      `getClass, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### ChunkSample

          public ChunkSample(String[] sentence,
                             String[] tags,
                             String[] preds)

      Initializes the current instance.
      Parameters:
        `sentence` - training sentence
        `tags` - POS Tags for the sentence
        `preds` - Chunk tags in B-* I-* notation

    - #### ChunkSample

          public ChunkSample(List<String> sentence,
                             List<String> tags,
                             List<String> preds)

      Initializes the current instance.
      Parameters:
        `sentence` - training sentence
        `tags` - POS Tags for the sentence
        `preds` - Chunk tags in B-* I-* notation

  - ### Method Detail

    - #### getSentence

          public String[] getSentence()

      Gets the training sentence

    - #### getTags

          public String[] getTags()

      Gets the POS Tags for the sentence

    - #### getPreds

          public String[] getPreds()

      Gets the Chunk tags in B-* I-* notation

    - #### getPhrasesAsSpanList

          public Span[] getPhrasesAsSpanList()

      Gets the phrases as an array of spans

    - #### phrasesAsSpanList

          public static Span[] phrasesAsSpanList(String[] aSentence,
                                                 String[] aTags,
                                                 String[] aPreds)

      Static method to create arrays of spans of phrases
      Parameters:
        `aSentence` - training sentence
        `aTags` - POS Tags for the sentence
        `aPreds` - Chunk tags in B-* I-* notation
      Returns:
        the phrases as an array of spans

    - #### nicePrint

          public String nicePrint()

      Creates a nice to read string for the phrases formatted as following:
      `[NP Rockwell_NNP ] [VP said_VBD ] [NP the_DT agreement_NN ] [VP calls_VBZ ] [SBAR for_IN ] [NP it_PRP ] [VP to_TO supply_VB ] [NP 200_CD additional_JJ so-called_JJ shipsets_NNS ] [PP for_IN ] [NP the_DT planes_NNS ] ._.`
      Returns:
        a nice to read string representation of the chunk phases

    - #### toString

          public String toString()

      Overrides:
        `toString` in class `Object`

    - #### hashCode

          public int hashCode()

      Overrides:
        `hashCode` in class `Object`

    - #### equals

          public boolean equals(Object obj)

      Overrides:
        `equals` in class `Object`

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