Package org.apache.commons.text.similarity

Class JaccardSimilarity

java.lang.Object

org.apache.commons.text.similarity.JaccardSimilarity

All Implemented Interfaces:

SimilarityScore<Double>

public class JaccardSimilarity
extends Object
implements SimilarityScore<Double>

Measures the Jaccard similarity (aka Jaccard index) of two sets of character sequence. Jaccard similarity is the size of the intersection divided by the size of the union of the two sets.

For further explanation about Jaccard Similarity, refer https://en.wikipedia.org/wiki/Jaccard_index

Since:

1.0

Constructor Summary

Constructors

Constructor	Description
JaccardSimilarity()

Method Summary

Modifier and Type	Method	Description
Double	apply(CharSequence left, CharSequence right)	Calculates Jaccard Similarity of two set character sequence passed as input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JaccardSimilarity

public JaccardSimilarity()

Method Details

apply

public Double apply(CharSequence left,
 CharSequence right)

Calculates Jaccard Similarity of two set character sequence passed as input.

Specified by:

apply in interface SimilarityScore<Double>

Parameters:

left - first character sequence

right - second character sequence

Returns:

index

Throws:

IllegalArgumentException - if either String input null