Java Collection Random Element randomIterable(Collection col)

Description

Takes given collection, shuffles it and returns iterable instance.

License

Apache License

Parameter

Parameter	Description
T	Type of elements to create iterator for.
col	Collection to shuffle.

Return

Iterable instance over randomly shuffled collection.

Declaration

public static <T> Iterable<T> randomIterable(Collection<T> col) 

Method Source Code

//package com.java2s;
/*//from w ww  . j  av  a 2 s .  co  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.List;

public class Main {
    /**
     * Takes given collection, shuffles it and returns iterable instance.
     *
     * @param <T> Type of elements to create iterator for.
     * @param col Collection to shuffle.
     * @return Iterable instance over randomly shuffled collection.
     */
    public static <T> Iterable<T> randomIterable(Collection<T> col) {
        List<T> list = new ArrayList<>(col);

        Collections.shuffle(list);

        return list;
    }
}

Related

1. random(Collection collection)
2. random(Collection coll)
3. random(Collection coll)
4. randomElement(Collection coll)
5. randomElement(Collection in)
6. rndSubset(final Collection c, final double ratio)
7. sampleWithReplacement(Collection c, int n)
8. selectRandom(Collection set)
9. selectRandom(Collection col)