Java Collection Remove removeDuplicates(Collection p_collection)

Description

Removes duplicate objects from the Collection.

License

Apache License

Parameter

Parameter	Description
p_collection	a Collection

Declaration

public static boolean removeDuplicates(Collection p_collection) 

Method Source Code

//package com.java2s;
/**//from   w  w w .j  a va 2  s. c  o m
 *  Copyright 2009 Welocalize, Inc. 
 *  
 *  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.Collection;
import java.util.Iterator;
import java.util.HashSet;

public class Main {
    /**
     * Removes duplicate objects from the Collection.
     * @param p_collection a Collection
     * @returns true if one or more duplicate objects were removed.
     */
    public static boolean removeDuplicates(Collection p_collection) {
        if (p_collection == null) {
            return false;
        }
        HashSet set = new HashSet(p_collection.size());
        Iterator it = p_collection.iterator();
        while (it.hasNext()) {
            set.add(it.next());
        }
        if (set.size() != p_collection.size()) {
            p_collection.clear();
            p_collection.addAll(set);
            return true;
        }
        return false;
    }
}

Related

1. removeArrayToCollection(T[] array, Collection collection)
2. removed(Collection old, Collection nu)
3. removed(Collection a, Collection b)
4. removeDuplicates(Collection collection)
5. removeDuplicates(Collection original)
6. removeDuplicates(Collection objects)
7. removeDuplicates(Collection elements)
8. removeElement(Collection coll)
9. removeElement(final int index, final Collection coll)