Returns the number of elements shared between the two arrays containing sets. Return the number of elements shared by two column index arrays. - Java Collection Framework

Java examples for Collection Framework:Array Contain

Description

Returns the number of elements shared between the two arrays containing sets. Return the number of elements shared by two column index arrays.

Demo Code

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//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        int[] arra = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int[] arrb = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(countCommonElements(arra, arrb));
    }

    /**
     * Returns the number of elements shared between the two arrays containing
     * sets.<p>
     *
     * Return the number of elements shared by two column index arrays.
     * This method assumes that each of these arrays contains a set (each
     * element index is listed only once in each index array). Otherwise the
     * returned number will NOT represent the number of unique column indexes
     * shared by both index array.
     *
     * @param arra int[]; first array of column indexes.
     *
     * @param arrb int[]; second array of column indexes
     *
     * @return int; number of elements shared by <code>a</code> and <code>b</code>
     */
    public static int countCommonElements(int[] arra, int[] arrb) {

        int k = 0;

        for (int i = 0; i < arra.length; i++) {
            for (int j = 0; j < arrb.length; j++) {
                if (arra[i] == arrb[j]) {
                    k++;
                }
            }
        }

        return k;
    }
}

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