Java Iterable to List iterableToList(Iterable iterable)

Description

iterable To List

License

Apache License

Parameter

Parameter	Description
iterable	Iterable whose contents are to be put into a List

Return

a with the objects one gets by iterating over the given

Declaration

public static <K> List<K> iterableToList(Iterable<K> iterable) 

Method Source Code

//package com.java2s;
/**//from www.jav a2 s  .c  o  m
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.Collections;
import java.util.Comparator;
import java.util.List;

public class Main {
    /**
     * @param iterable {@link Iterable} whose contents are to be put into a {@link List}
     * @return a {@link List} with the objects one gets by iterating over the given {@link Iterable}
     */
    public static <K> List<K> iterableToList(Iterable<K> iterable) {
        return iterableToList(iterable, null);
    }

    /**
     * @param iterable   {@link Iterable} whose contents are to be put into a {@link List}
     * @param comparator {@link Comparator} defining the sort order of the returned {@link List}
     * @return a {@link List} with the objects one gets by iterating over the given {@link Iterable}, sorted according to
     *         the given {@link Comparator}
     */
    public static <K> List<K> iterableToList(Iterable<K> iterable, Comparator<K> comparator) {
        if (iterable == null) {
            throw new IllegalArgumentException("iterable is null");
        }
        List<K> list;
        if (iterable instanceof Collection) {
            if (iterable instanceof List) {
                list = (List<K>) iterable;
            } else {
                Collection<K> collection = (Collection<K>) iterable;
                list = new ArrayList<K>(collection.size());
                list.addAll(collection);
            }
        } else {
            list = new ArrayList<K>();
            for (K item : iterable) {
                list.add(item);
            }
        }
        if (comparator != null) {
            Collections.sort(list, comparator);
        }
        return list;
    }
}

Related

1. iterable2List(Iterable iterable)
2. iterableAsList(Iterable iterable)
3. iterableToCollection(Iterable c, Collection list)
4. iterableToCollection(Iterable c, Collection list)
5. iterableToList(Iterable input)
6. iterableToList(Iterable iterable)
7. iterableToSSV(Iterable list, String sep)
8. toList(Iterable i)