Here you can find the source of invokeParameterlessMethod(T theObject, String methodName)
static public <T> Object invokeParameterlessMethod(T theObject, String methodName) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException
//package com.java2s; /*//from w ww . j av a 2s. com * 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.InvocationTargetException; import java.lang.reflect.Method; public class Main { static public <T> Object invokeParameterlessMethod(T theObject, String methodName) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException { Method method = theObject.getClass().getDeclaredMethod(methodName, null); method.setAccessible(true); return method.invoke(theObject, null); } }