Java Collection Convert convert(Collection list)

Description

convert

License

Open Source License

Declaration

public static double[] convert(Collection<Double> list) 

Method Source Code

//package com.java2s;
/****/*from  ww  w.  java2 s . co  m*/
    
activequant - activestocks.eu
    
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
    
       
   contact  : contact@activestocks.eu
homepage : http://www.activestocks.eu
    
****/

import java.util.Collection;

public class Main {
    public static double[] convert(Collection<Double> list) {
        return convert(list.toArray(new Double[] {}));
    }

    public static double[] convert(Double[] in) {
        double[] ret = new double[in.length];
        for (int i = 0; i < in.length; i++) {
            ret[i] = in[i];
        }
        return ret;
    }

    public static Double[] convert(double[] in) {
        Double[] ret = new Double[in.length];
        for (int i = 0; i < in.length; i++) {
            ret[i] = in[i];
        }
        return ret;
    }

    public static double[][] convert(Double[][] in) {
        double[][] ret = new double[in.length][in[0].length];
        for (int i = 0; i < in.length; i++) {
            for (int j = 0; j < in[0].length; j++) {
                ret[i][j] = in[i][j];
            }
        }
        return ret;
    }
}

Related

1. convert(Collection c)
2. convert2IntegerCollection(String[] strs)
3. convertArrayInCollection(String[] array)
4. convertCharCollectionToArray(Collection chars)