Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is S23M.
 *
 * The Initial Developer of the Original Code is
 * The S23M Foundation.
 * Portions created by the Initial Developer are
 * Copyright (C) 2012 The S23M Foundation.
 * All Rights Reserved.
 *
 * Contributor(s):
 * Andrew Shewring
 * ***** END LICENSE BLOCK ***** */

public class Main {
    private static final int DOUG_LEA_BLACK_MAGIC_OPERAND_1 = 20;
    private static final int DOUG_LEA_BLACK_MAGIC_OPERAND_2 = 12;
    private static final int DOUG_LEA_BLACK_MAGIC_OPERAND_3 = 7;
    private static final int DOUG_LEA_BLACK_MAGIC_OPERAND_4 = 4;

    /**
     * Returns a hash code for non-null Object x.
     * <p/>
     * This function ensures that hashCodes that differ only by
     * constant multiples at each bit position have a bounded
     * number of collisions. (Doug Lea)
     *
     * @param object the object serving as a key
     * @return the hash code
     */
    public static int hash(final Object object) {
        int h = object.hashCode();
        h ^= (h >>> DOUG_LEA_BLACK_MAGIC_OPERAND_1) ^ (h >>> DOUG_LEA_BLACK_MAGIC_OPERAND_2);
        return h ^ (h >>> DOUG_LEA_BLACK_MAGIC_OPERAND_3) ^ (h >>> DOUG_LEA_BLACK_MAGIC_OPERAND_4);
    }
}