Returns the hash-code of the specified object. - Java java.lang

Java examples for java.lang:Object

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Description

Returns the hash-code of the specified object.

Demo Code

/*/*from  w  w  w .  j a v a2 s  .co m*/
 * Copyright (c) 2015-2016 QuartzDesk.com.
 * Licensed under the MIT license (https://opensource.org/licenses/MIT).
 */
//package com.java2s;

import java.util.Arrays;

public class Main {
    public static void main(String[] argv) throws Exception {
        Object o = "java2s.com";
        System.out.println(safeHashCode(o));
    }

    /**
     * Returns the hash-code of the specified object. If the specified object
     * is null, then this method returns 1, rather then throwing NullPointerException.
     *
     * @param o the object.
     * @return the object's hash-code, or 1 if the object is null.
     */
    public static int safeHashCode(Object o) {
        int hash = 1;

        if (o != null) {
            if (o.getClass().isArray())
                return Arrays.deepHashCode((Object[]) o);
            else
                hash = o.hashCode();
        }

        return hash;
    }
}

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