获取双倍字段。

// 来 自 时   代     Java  公  众  号 - nowjava.com

/*

 * NOTE: This is added by intellij IDE. Disregard this message if there is another copyright later in the file.

 * Copyright (C) 2014-2015  Will (n9Mtq4) Bresnahan

 * 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/>.

 */

//package com.nowjava;


import java.lang.reflect.Field;


public class Main {

    /**

     * Gets double.

     *

     * @param field the field

     * @param obj the obj

     * @return the double

     */

    public static double getDouble(Field field, Object obj) {

        try {

            field.setAccessible(true);

            return field.getDouble(obj);

        } catch (Exception e) {

            e.printStackTrace();

            return 0;/*from n o w j a v a . c o m*/

        }

    }


    /**

     * Gets double.

     *

     * @param fieldName the field name

     * @param obj       the obj

     * @param clazz     the class

     * @return the double

     */

    public static double getDouble(String fieldName, Object obj, Class clazz) {

        try {

            Field f = clazz.getDeclaredField(fieldName);

            return getDouble(f, obj);

        } catch (Exception e) {

            e.printStackTrace();

            return 0;