Java Class Loader loadClass(String className)

Description

load Class

License

Open Source License

Declaration

public static Class<?> loadClass(String className) 

Method Source Code

//package com.java2s;
/*//www.j  a  va 2  s  .c  o m
 * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.io.File;

import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;

public class Main {
    private static final boolean USE_SEPARATE_CLASSLOADER = Boolean.getBoolean("jmh.separateClassLoader");

    public static Class<?> loadClass(String className) {
        try {
            if (!USE_SEPARATE_CLASSLOADER) {
                return Class.forName(className);
            }

            // load the class in a different classloader
            String classPathValue = System.getProperty("java.class.path");
            String[] classPath = classPathValue.split(File.pathSeparator);
            URL[] classPathUrl = new URL[classPath.length];
            for (int i = 0; i < classPathUrl.length; i++) {
                try {
                    classPathUrl[i] = new File(classPath[i]).toURI().toURL();
                } catch (MalformedURLException ex) {
                    throw new RuntimeException(
                            "Error parsing the value of property java.class.path: " + classPathValue, ex);
                }
            }

            URLClassLoader loader = new URLClassLoader(classPathUrl);
            return loader.loadClass(className);
        } catch (ClassNotFoundException ex) {
            throw new IllegalArgumentException("Benchmark does not match a class", ex);
        }
    }
}

Related

1. loadAllAutoConfigFiles(ClassLoader classloader)
2. loadArrayClass(ClassLoader cl, String aName)
3. loadClass(ClassLoader cl, String cName)
4. loadClass(final File baseFolder, final String qualifiedType)
5. loadClass(final File classFolder, final String className)
6. loadClass(String className)
7. loadClass(String dir, String classname)
8. loadClass(String name)
9. loadClass(String name, Object fallbackClass)