Android examples for java.lang:array calculation
hash Code on two dimensional array
/**/* www . ja va 2 s .c o m*/ * * Copyright 2008 - 2009 * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. * * @project loonframework * @author chenpeng * @email?ceponline@yahoo.com.cn * @version 0.1.1 */ //package com.java2s; public class Main { public static int hashCode(int[][] arrays) { if (arrays == null) { return 0; } int result = 1; int h = arrays.length; int w = arrays[0].length; int value = 0; for (int i = 0; i < h; i++) { for (int j = 0; j < w; j++) { value = arrays[i][j]; int elementHash = (value ^ (value >>> 32)); result = 31 * result + elementHash; } } return result; } }