Returns the intersection of two sets without modifying the original sets. - Android java.util

Android examples for java.util:Set

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Description

Returns the intersection of two sets without modifying the original sets.

Demo Code

/*/*from  w ww.java2s .c o  m*/
 * This library is part of Geranium -
 * an open source UI library for GWT.
 *
 * Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)-
 *
 * 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.
 *
 * For further information about Alkacon Software, please see the
 * company website: http://www.alkacon.com
 * 
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
//package com.book2s;

import java.util.HashSet;

import java.util.Set;

public class Main {
    /**
     * Returns the intersection of two sets without modifying the original sets.<p>
     * 
     * @param <A> the type of objects contained in the sets
     * 
     * @param first the first set
     * @param second the second set
     * 
     * @return the intersection of both sets
     */
    public static <A> Set<A> intersection(Set<A> first, Set<A> second) {

        HashSet<A> result = new HashSet<A>(first);
        result.retainAll(second);
        return result;
    }
}

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