Java Reflection Field Set setField(Class clazz, T instance, String fieldName, Object value)

Description

set Field

License

Apache License

Declaration

public static <T> void setField(Class<T> clazz, T instance, String fieldName, Object value) 

Method Source Code

//package com.java2s;
/*//from   w  ww.  j a  v  a2  s  . c o  m
 * Copyright 2011-2015 B2i Healthcare Pte Ltd, http://b2i.sg
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.lang.reflect.Field;

public class Main {
    public static <T> void setField(Class<T> clazz, T instance, String fieldName, Object value) {
        try {
            Field field = clazz.getDeclaredField(fieldName);
            field.setAccessible(true);
            field.set(instance, value);

        } catch (SecurityException e) {
            handleException(e);
        } catch (NoSuchFieldException e) {
            handleException(e);
        } catch (IllegalAccessException e) {
            handleException(e);
        }
    }

    public static <T> void setField(T owner, String fieldName, Object value) {
        setField((Class<T>) owner.getClass(), owner, fieldName, value);
    }

    protected static void handleException(Throwable e) {
        throw new RuntimeException("An error occurred while reflecting", e);
    }
}

Related

1. setField(Class cl, String name, Object obj, Object value)
2. setField(Class clazz, Object instance, String field, Object value)
3. setField(Class clazz, Object obj, String fieldName, Object value)
4. setField(Class ownerClass, Object owner, String fieldName, Object newValue)
5. setField(Class target, Class fieldType, int index, Object obj, Object value)
6. setField(Class clazz, T instance, String fieldName, Object value)
7. setField(Field f, Object instance, Object value)
8. setField(Field f, Object this_, Object value)
9. setField(Field field, @Nullable Object instance, Object thing)