Java Reflection Field Value Set setFieldValue(Object obj, String fieldName, Object value)

Description

Reads the value of a field.

License

Open Source License

Parameter

Parameter	Description
obj	the object to read the field value from. If it is a static field the object can be a instance of Class.

Declaration

public static void setFieldValue(Object obj, String fieldName, Object value) 

Method Source Code

//package com.java2s;
/*//from   w w w  .ja v a 2 s.  c o  m
 *  PHEX - The pure-java Gnutella-servent.
 *  Copyright (C) 2001 - 2005 Phex Development Group
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

import java.lang.reflect.*;

public class Main {
    /**
     * Reads the value of a field.
     * @param obj the object to read the field value from. If it is a static field
     *            the object can be a instance of Class.
     */
    public static void setFieldValue(Object obj, String fieldName, Object value) {
        try {
            Class clazz;
            if (obj instanceof Class) {
                clazz = (Class) obj;
            } else {
                clazz = obj.getClass();
            }
            Field field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            field.set(obj, value);
        } catch (Exception exp) {
            exp.printStackTrace();
            throw new RuntimeException(exp.getMessage());
        }
    }
}

Related

1. SetFieldValue(Object o, String field, Object object)
2. setFieldValue(Object obj, Field f, Object value)
3. setFieldValue(Object obj, Field field, Object value)
4. setFieldValue(Object obj, Field field, Object value)
5. setFieldValue(Object obj, String field, Object value)
6. setFieldValue(Object obj, String fieldname, Object value)
7. setFieldValue(Object obj, String fieldName, Object value)
8. setFieldValue(Object obj, String fieldName, Object value)
9. setFieldValue(Object obj, String fieldName, Object value)