Java Reflection Field Set setField(Object targetObject, String fieldName, Object value, boolean failIfError)

Description

Sets the fields value via reflection, this is useful in case there is no setter defined on the target object.

License

Open Source License

Parameter

Parameter	Description
targetObject	the object to set a field on
fieldName	the name of the field to be set
value	the new value for the field

Declaration

public static void setField(Object targetObject, String fieldName, Object value, boolean failIfError) 

Method Source Code

//package com.java2s;
/*/*from   ww w. ja  v a 2  s .c o m*/
 * The MIT License
 *
 * Copyright (c) 2012, Dominik Bartholdi
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import java.lang.reflect.Field;

public class Main {
    /**
     * Sets the fields value via reflection, this is useful in case there is no setter defined on the target object.
     * 
     * @param targetObject
     *            the object to set a field on
     * @param fieldName
     *            the name of the field to be set
     * @param value
     *            the new value for the field
     */
    public static void setField(Object targetObject, String fieldName, Object value, boolean failIfError) {
        try {
            Field f = targetObject.getClass().getDeclaredField(fieldName);
            f.setAccessible(true);
            f.set(targetObject, value);
        } catch (Exception e) {
            if (failIfError) {
                throw new RuntimeException("failed to set field", e);
            } else {
                System.err.println("WARN: failed to set field [" + fieldName + "] on [" + targetObject + "] "
                        + e.getClass() + ": " + e.getMessage());
            }
        }
    }
}

Related

1. setField(Object target, String fieldname, Object value)
2. setField(Object target, String name, Object value)
3. setField(Object target, String name, Object value)
4. setField(Object target, String name, Object value)
5. setField(Object target, String name, Object value)
6. setField(String field, Object object, Object value)
7. setField(String field, Object value)
8. setField(String fieldName, Object instance, Class instanceClass, Object value)
9. setField(String fieldName, Object instance, Object value)