Here you can find the source of setFieldValue(Object obj, String name, Object value)
public static void setFieldValue(Object obj, String name, Object value) throws NoSuchFieldException, IllegalAccessException
//package com.java2s; /*//from w w w . j a v a 2 s .c om * Copyright ? 2016 Oleg Cherednik * * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work * for additional information regarding copyright ownership. The ASF licenses this file to You 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 void setFieldValue(Object obj, String name, Object value) throws NoSuchFieldException, IllegalAccessException { Field field = getField(obj.getClass(), name); boolean accessible = field.isAccessible(); field.setAccessible(true); try { field.set(obj, value); } finally { field.setAccessible(accessible); } } private static Field getField(Class<?> cls, String name) throws NoSuchFieldException { Field field = null; while (field == null && cls != null) { try { field = cls.getDeclaredField(name); } catch (NoSuchFieldException ignored) { cls = cls.getSuperclass(); } } if (field == null) throw new NoSuchFieldException(); return field; } }