Java Collection Subtract subtract(final Collection a, final Collection b)

Description

subtract

License

Apache License

Declaration

public static <K> Collection<K> subtract(final Collection<K> a, final Collection<K> b) 

Method Source Code

//package com.java2s;
/*//ww w  .ja  v  a  2 s .c  o m
 * Copyright 2009 Thomas Bocek
 * 
 * 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.ArrayList;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;

import java.util.Map;

public class Main {
    public static <K> Collection<K> subtract(final Collection<K> a, final Collection<K> b) {
        ArrayList<K> list = new ArrayList<K>(a);
        for (Iterator<K> it = b.iterator(); it.hasNext();) {
            list.remove(it.next());
        }
        return list;
    }

    public static <K, V> Map<K, V> subtract(final Map<K, V> a, final Collection<K> b) {
        Map<K, V> map = new HashMap<K, V>(a);
        for (Iterator<K> it = b.iterator(); it.hasNext();) {
            map.remove(it.next());
        }
        return map;
    }
}

Related

1. subtract(Collection a, Collection b)
2. subtract(Collection c1, Collection c2)
3. subtract(Collection l1, Collection l2)
4. subtract(Collection l1, Collection l2)
5. subtract(final Collection a, final Collection b)
6. subtract(final Collection a, final Collection b)
7. subtract(final Collection a, final Collection b)
8. subtractCollections(Collection collection1, Collection collection2)