Java Hash Code Calculate hashCode(final long l)

Description

hash Code

License

Open Source License

Parameter

Parameter	Description
l	The long number for which to calculate the hashcode.

Return

the same as new Long(l).hashCode() would do, but without the overhead of creating a Long instance.

Declaration

public static int hashCode(final long l) 

Method Source Code

//package com.java2s;
/* ********************************************************************
 * NightLabs PDF Viewer - http://www.nightlabs.org/projects/pdfviewer *
 * Copyright (C) 2004-2008 NightLabs GmbH - http://NightLabs.org      *
 *                                                                    *
 * This library is free software; you can redistribute it and/or      *
 * modify it under the terms of the GNU Lesser General Public         *
 * License as published by the Free Software Foundation; either       *
 * version 2.1 of the License, or (at your option) any later version. *
 *                                                                    *
 * This library is distributed in the hope that it will be useful,    *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of     *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
 * Lesser General Public License for more details.                    *
 *                                                                    *
 * You should have received a copy of the GNU Lesser General Public   *
 * License along with this library; if not, write to the              *
 *     Free Software Foundation, Inc.,                                *
 *     51 Franklin St, Fifth Floor,                                   *
 *     Boston, MA  02110-1301  USA                                    *
 *                                                                    *
 * Or get it online:                                                  *
 *     http://www.gnu.org/copyleft/lesser.html                        *
 **********************************************************************/

public class Main {
    /**// w ww.  j a  va 2 s  .  co  m
     * @param l The long number for which to calculate the hashcode.
     * @return the same as new Long(l).hashCode() would do, but
     *       without the overhead of creating a Long instance.
     */
    public static int hashCode(final long l) {
        return (int) (l ^ (l >>> 32));
    }

    /**
     * Get a hash code for an object. This method also handles
     * <code>null</code>-Objects.
     * @param obj An object or <code>null</code>
     * @return <code>0</code> if <code>obj == null</code> -
     *       <code>obj.hashCode()</code> otherwise
     */
    public static int hashCode(final Object obj) {
        return obj == null ? 0 : obj.hashCode();
    }
}

Related

1. hashCode(final int i)
2. hashCode(final int i)
3. hashCode(final int seed, final int hashcode)
4. hashCode(final int x, final int y)
5. hashcode(final int[] array)
6. hashCode(final long l)
7. hashCode(final long v)
8. hashCode(final Object obj)
9. hashCode(final Object obj)