Java Collection Add addAllSafe(Collection collection1, Collection collection2)

Description

Adds all elements of collection2 to collection1.

License

Apache License

Declaration

public static <T> void addAllSafe(Collection<T> collection1, Collection<T> collection2) 

Method Source Code

//package com.java2s;
/*-------------------------------------------------------------------------+
|                                                                          |
| Copyright 2005-2011 The ConQAT Project                                   |
|                                                                          |
| 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;

public class Main {
    /**/*  www.jav  a  2 s.c  o m*/
     * Adds all elements of collection2 to collection1. collection2 may be
     * <code>null</code>, in which case nothing happens.
     */
    public static <T> void addAllSafe(Collection<T> collection1, Collection<T> collection2) {
        if (collection2 != null) {
            collection1.addAll(collection2);
        }
    }
}

Related

1. addAllIfSet(Collection target, Collection c)
2. addAllIgnoreNull(Collection c, T... elements)
3. addAllIgnoreNull(final Collection target, final Collection source)
4. addAllNotNull(final Collection c, final E... elements)
5. addAllOrSame(Collection collection, Collection newElements)
6. addAllUncontained(Collection col1, Collection col2)
7. addAllUnique(final Collection collection, final Collection values)
8. addArray(Collection col, T[] array)
9. addArray(java.util.Collection v, T array[])