Sets a private field value. - Java Reflection

Java examples for Reflection:Field Value

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Description

Sets a private field value.

Demo Code

/*//from  w  ww .j  av a2s .c  o m
 * Copyright (c) 2005-2016 Vincent Vandenschrick. All rights reserved.
 *
 *  This file is part of the Jspresso framework.
 *
 *  Jspresso is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  Jspresso 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with Jspresso.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;
import java.lang.reflect.Field;

public class Main {
    /**
     * Sets a private field value.
     *
     * @param clazz
     *          the class declaring the private field.
     * @param fieldName
     *          the field name.
     * @param target
     *          the target object
     * @param fieldValue
     *          the private field value or null if not found.
     * @throws IllegalAccessException
     *           if accessibility context prevents from accessing the field.
     * @throws NoSuchFieldException
     *           if the field does not exist.
     */
    public static void setPrivateFieldValue(Class<?> clazz,
            String fieldName, Object target, Object fieldValue)
            throws IllegalAccessException, NoSuchFieldException {
        Field field = clazz.getDeclaredField(fieldName);
        field.setAccessible(true);
        field.set(target, fieldValue);
    }
}

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