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Java 返回包含集合的两个数组之间共享的元素数。返回两个列索引数组共享的元素数。
返回包含集合的两个数组之间共享的元素数。返回两个列索引数组共享的元素数。
实例源码：
源代码：
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/* Copyright (c) 2001-2010, The HSQL Development Group3
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* All rights reserved.5
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*7
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* Redistribution and use in source and binary forms, with or without9
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* modification, are permitted provided that the following conditions are met:11
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*13
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* Redistributions of source code must retain the above copyright notice, this15
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* list of conditions and the following disclaimer.17
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*19
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* Redistributions in binary form must reproduce the above copyright notice,21
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* this list of conditions and the following disclaimer in the documentation23
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* and/or other materials provided with the distribution.25
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*27
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* Neither the name of the HSQL Development Group nor the names of its29
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* contributors may be used to endorse or promote products derived from this31
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* software without specific prior written permission.33
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*35
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"37
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE39
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE41
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* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,43
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,45
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,47
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;49
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND51
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT53
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS55
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.57
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*/59
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//package com.nowjava;//时代Java公众号 - nowjava.com 提 供61
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public class Main {64
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public static void main(String[] argv) throws Exception {66
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int[] arra = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };68
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int[] arrb = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };70
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System.out.println(countCommonElements(arra, arrb));72
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}74
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/**77
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* Returns the number of elements shared between the two arrays containing79
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* sets.<p>81
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*83
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* Return the number of elements shared by two column index arrays.85
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* This method assumes that each of these arrays contains a set (each87
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* element index is listed only once in each index array). Otherwise the89
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* returned number will NOT represent the number of unique column indexes91
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* shared by both index array.93
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*95
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* @param arra int[]; first array of column indexes.97
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*99
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* @param arrb int[]; second array of column indexes101
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*103
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