Java Map Invert invert(Map in)

Description

invert

License

Open Source License

Declaration

public static <K, V> HashMap<V, K> invert(Map<K, V> in) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Breakout Cave Survey Visualizer/*w ww .  ja  v a  2  s . co  m*/
 *
 * Copyright (C) 2014 James Edwards
 *
 * jedwards8 at fastmail dot fm
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *******************************************************************************/

import java.util.HashMap;

import java.util.Map;

public class Main {
    public static <K, V> HashMap<V, K> invert(Map<K, V> in) {
        HashMap<V, K> result = new HashMap<V, K>();
        for (Map.Entry<K, V> e : in.entrySet()) {
            result.put(e.getValue(), e.getKey());
        }
        return result;
    }

    public static <K, V> void invert(Map<K, V> in, Map<V, K> out) {
        for (Map.Entry<K, V> e : in.entrySet()) {
            out.put(e.getValue(), e.getKey());
        }
    }
}

Related

1. inverse(Map m, Map newMap)
2. inverse(Map map)
3. inverse(Map map)
4. inverseGet(Map map, Object value)
5. invert(Map map)
6. invert(Map map)
7. invert(Map map, String prefix)
8. invert(Map map)
9. invertedMapFrom(Map source)