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

opennlp.tools.util.eval

## Interface EvaluationMonitor<T>

- All Known Subinterfaces:
    ChunkerEvaluationMonitor, DoccatEvaluationMonitor, LanguageDetectorEvaluationMonitor, LemmatizerEvaluationMonitor, ParserEvaluationMonitor, POSTaggerEvaluationMonitor, SentenceDetectorEvaluationMonitor, TokenizerEvaluationMonitor, TokenNameFinderEvaluationMonitor
  All Known Implementing Classes:
    ChunkerDetailedFMeasureListener, ChunkEvaluationErrorListener, opennlp.tools.cmdline.DetailedFMeasureListener, DetokenEvaluationErrorListener, DoccatEvaluationErrorListener, DoccatFineGrainedReportListener, opennlp.tools.cmdline.EvaluationErrorPrinter, LanguageDetectorEvaluationErrorListener, LanguageDetectorFineGrainedReportListener, LemmaEvaluationErrorListener, LemmatizerFineGrainedReportListener, NameEvaluationErrorListener, POSEvaluationErrorListener, POSTaggerFineGrainedReportListener, SentenceEvaluationErrorListener, TokenEvaluationErrorListener, TokenNameFinderDetailedFMeasureListener, TokenNameFinderFineGrainedReportListener

      public interface EvaluationMonitor<T>

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `correctlyClassified(T reference, T prediction)`
    `void` | `missclassified(T reference, T prediction)`

- - ### Method Detail

    - #### correctlyClassified

          void correctlyClassified(T reference,
                                   T prediction)

    - #### missclassified

          void missclassified(T reference,
                              T prediction)

Copyright © 2026 The Apache Software Foundation. All rights reserved.