Like many server applications, Tomcat installs a variety of class loaders (that is, classes that implement java.lang.ClassLoader) to allow different portions of the container, and the web ...

Complex Java programs, such as application servers, sometimes create their own class loaders using the URLClassLoader type. With URLClassLoader, applications can load classes and resources from a ...

Java 5 added the Java Instrumentation mechanism, which allows you to provide “Java agents” that can inspect and modify the byte code of the classes as they are loaded.