Java : Collection Framework : Collections (Frequency)

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CollectionsExample.java
import java.util.ArrayList;

import java.util.Collections;

/*
 *  Example of  
 *  frequency(Collection<?> c,Object o) method
 */

public class CollectionsExample
{

    public static void main(String[] args)
    {

        ArrayList<Integer> arrayList = new ArrayList<Integer>();

        arrayList.add(2000);
        arrayList.add(3000);
        arrayList.add(4000);
        arrayList.add(1000);
        arrayList.add(2000);
        arrayList.add(2000);

        System.out.println("arrayList : " + arrayList + "\n");

        /*
         * Returns the number of elements in the specified collection equal to
         * the specified object.
         */

        int frequency = Collections.frequency(arrayList, 2000);

        System.out.println("frequency : " + frequency);

    }

}

Output

arrayList : [2000, 3000, 4000, 1000, 2000, 2000]

frequency : 3

To Download CollectionsDemoFrequencyApp Project Click the below link
https://sites.google.com/site/javaee4321/java-collections/CollectionsDemoFrequencyApp.zip?attredirects=0&d=1

See also:

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