Here you can find the source of loadClass(ClassLoader loader, String className, String errorMessage)
public static Class<?> loadClass(ClassLoader loader, String className, String errorMessage) throws ClassNotFoundException
//package com.java2s; /*// ww w .j ava 2 s . c om * Copyright (C) 2013 Anton Tychyna <anton.tychina@gmail.com> * * 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. */ public class Main { public static Class<?> loadClass(ClassLoader loader, String className, String errorMessage) throws ClassNotFoundException { Class clazz; try { clazz = loader.loadClass(className); } catch (ClassNotFoundException e) { throw new ClassNotFoundException(errorMessage, e); } return clazz; } }