Java List Select selectRandom(List list)

Description

select Random

License

Apache License

Parameter

Parameter	Description
list	a parameter

Declaration

public static <T> T selectRandom(List<T> list) 

Method Source Code

//package com.java2s;
/*/* ww  w  .j av a 2 s. com*/
 * chombo: Hadoop Map Reduce utility
 * Author: Pranab Ghosh
 * 
 * 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.List;

public class Main {
    /**
     * @param list
     * @return
     */
    public static <T> T selectRandom(List<T> list) {
        int index = (int) (Math.random() * list.size());
        return list.get(index);
    }
}

Related

1. select(List src, List indexes)
2. selectDuplicateQualifiers( List elements)
3. selectElements(final List list, int start, int end)
4. selectExactly(List original, int nb)
5. selectFields(String[] fields, List fieldList, int allFieldsFrom, String separator)
6. selectTopN(List originalList, int topN, Comparator