Returns a set containing all the elements which are not contained by the two given sets. - Android java.util

Android examples for java.util:Set

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Description

Returns a set containing all the elements which are not contained by the two given sets.

Demo Code

/*//from   w  w  w.  ja v a 2  s. com
 * "Copyright (c) 2015   Capgemini Technology Services (hereinafter "Capgemini")
 *
 * License/Terms of Use
 * Permission is hereby granted, free of charge and for the term of intellectual
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 * propagate free of charge, anywhere in the world, all or part of the Software
 * subject to the following mandatory conditions:
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 * all copies or substantial portions of the Software.
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 * Any failure to comply with the above shall automatically terminate the license
 * and be construed as a breach of these Terms of Use causing significant harm to
 * Capgemini.
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, PEACEFUL ENJOYMENT,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
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 * IMPORTANT NOTICE: The WUIC software implements software components governed by
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//package com.book2s;
import java.util.*;

public class Main {
    /**
     * <p>
     * Returns a set containing all the elements which are not contained by the two given sets.
     * </p>
     *
     * @param first the first set
     * @param second the second set
     * @param <T> the type of element
     * @return the difference between two sets
     */
    public static <T> Set<T> difference(final Set<T> first,
            final Set<T> second) {
        final Set<T> retval = new HashSet<T>();

        for (final T e : first) {
            if (!second.contains(e)) {
                retval.add(e);
            }
        }

        for (final T e : second) {
            if (!first.contains(e)) {
                retval.add(e);
            }
        }

        return retval;
    }
}

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