Java Zero Format zeroOrderBessel(float num)

Description

zero Order Bessel

License

Open Source License

Declaration

public static float zeroOrderBessel(float num) 

Method Source Code

//package com.java2s;
/*/*ww w.j a v a  2  s . co  m*/
 * Copyright (C) 2015 An Honest Effort LLC, coping.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public static float zeroOrderBessel(float num) {
        float d = 0;
        float ds = 1;
        float s = 1;

        do {
            d += 2;
            ds *= num * num / (d * d);
            s += ds;
        } while (ds > (s * 1e-6f));

        return s;
    }

    public static float zeroOrderBessel(double num) {
        return zeroOrderBessel((float) num);
    }
}

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