Main.java Source code

Introduction

Here is the source code for Main.java

Source

//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;

import java.util.HashSet;

public class Main {
    /**
     * Return a set containing the union of all provided collections. We use a
     * {@link HashSet}, i.e. the elements should support hashing.
     * 
     * We use two separate arguments to ensure on the interface level that at
     * least one collection is provided. This is transparent for the caller.
     */
    public static <T> HashSet<T> unionSet(Collection<T> collection1,
            @SuppressWarnings("unchecked") Collection<T>... furtherCollections) {
        HashSet<T> result = new HashSet<T>(collection1);
        for (Collection<T> collection : furtherCollections) {
            result.addAll(collection);
        }
        return result;
    }
}