Java List Remove removeFromListMap(T key, U value, Map> map)

Description

Remove an element from a map whose values are lists of elements.

License

Apache License

Parameter

Parameter	Description
T	the type of the keys in the map.
U	the type of the elements in the lists.
key	the key for the value to remove.
value	the value to remove.
map	the map from which to remove the key/value pair.

Declaration

public static <T, U> void removeFromListMap(T key, U value,
        Map<T, List<U>> map) 

Method Source Code

//package com.java2s;
/*//from w ww.  j  a  va 2  s  . c om
 * JPPF.
 * Copyright (C) 2005-2010 JPPF Team.
 * http://www.jppf.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.util.*;

public class Main {
    /**
     * Remove an element from a map whose values are lists of elements.
     * @param <T> the type of the keys in the map.
     * @param <U> the type of the elements in the lists.
     * @param key the key for the value to remove.
     * @param value the value to remove.
     * @param map the map from which to remove the key/value pair.
     */
    public static <T, U> void removeFromListMap(T key, U value,
            Map<T, List<U>> map) {
        List<U> list = map.get(key);
        if (list == null)
            return;
        list.remove(value);
        if (list.isEmpty())
            map.remove(key);
    }
}

Related

1. removeEmptyValues(final List values)
2. removeFrom(List col, int from)
3. removeFrom(List list, T member)
4. removeFromArray(String[] fieldList, String exludeElement)
5. removeFromListByClass(final List list, final String className)
6. removeIgnoreCase(List l, String s)
7. removeIgnoreCase(String needle, List haystack)
8. removeItems(List list, T... remove)
9. removeList(List l)