Remove all object from collection to other collection - Java java.util

Java examples for java.util:Collection Element Remove

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Description

Remove all object from collection to other collection

Demo Code

/*//from  w  ww. j av a  2s .co m
 *  Copyright 2011 Eko Kurniawan Khannedy.
 * 
 *  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.
 *  under the License.
 */
//package com.book2s;
import java.util.Collection;

public class Main {
    public static void main(String[] argv) {
        Collection from = java.util.Arrays.asList("asdf", "book2s.com");
        Collection to = java.util.Arrays.asList("asdf", "book2s.com");
        moveAllObject(from, to);
    }

    /**
     * Remove all object from collection to other collection
     * @param <T>
     * @param from source collection
     * @param to target collection
     */
    public static <T> void moveAllObject(Collection<T> from,
            Collection<T> to) {
        if (!from.isEmpty()) {
            to.addAll(from);
            from.clear();
        }
    }
}

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