Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Java Common Library
 * Copyright (c) 2008 BitCtrl Systems GmbH
 *
 * 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 3.0 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 Street, Fifth Floor, Boston, MA  02110-1301  USA.
 *
 * Contact Information:
 * BitCtrl Systems GmbH
 * Weienfelser Strae 67
 * 04229 Leipzig
 * Phone: +49 341-490670
 * mailto: info@bitctrl.de
 */

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Main {

    public static <T> List<T> complement(final List<T> list1, final List<T> list2) {
        return union(difference(list1, list2), difference(list2, list1));
    }

    public static <T> Set<T> complement(final Set<T> set1, final Set<T> set2) {
        return union(difference(set1, set2), difference(set2, set1));
    }

    public static <T> List<T> union(final List<T> list1, final List<T> list2) {
        final List<T> result = new ArrayList<T>();
        result.addAll(list1);
        result.addAll(list2);

        return result;
    }

    /**
     * Bestimmt die Vereinigung zweier Mengen.
     * 
     * @param <T>
     *            der Typ der Mengen.
     * @param set1
     *            die erste Menge.
     * @param set2
     *            die zweite Menge.
     * @return die Mengenvereinigung.
     */
    public static <T> Set<T> union(final Set<T> set1, final Set<T> set2) {
        final Set<T> result = new HashSet<T>();
        result.addAll(set1);
        result.addAll(set2);

        return result;
    }

    public static <T> List<T> difference(final List<T> list1, final List<T> list2) {
        final List<T> result = new ArrayList<T>(list1);

        for (final T e : list2) {
            result.remove(e);
        }

        return result;
    }

    /**
     * Bestimmt die Differenz zweier Mengen.
     * 
     * @param <T>
     *            der Typ der Mengen.
     * @param set1
     *            die Menge von der abgezogen wird.
     * @param set2
     *            die Elemente dieser Liste werden abgezogen.
     * @return die Mengendifferenz.
     */
    public static <T> Set<T> difference(final Set<T> set1, final Set<T> set2) {
        final Set<T> result = new HashSet<T>(set1);

        for (final T e : set2) {
            result.remove(e);
        }

        return result;
    }
}