private static Class<?> getAbstractClassLoader(String className) {
        try {
            return Class.forName(className, false, Object.class.getClassLoader());
        } catch (ClassNotFoundException e) {
            throw new IllegalStateException(className + " not found Caused by:" + e.getMessage(), e);
        }
    }
for ibm j9 jvm

@author Woonduk Kang(emeroad)
agent-module/bootstraps/bootstrap-core/src/main/java/com/navercorp/pinpoint/bootstrap/classloader/J9BootLoader.java