The Alfresco SDK's Rapid Application Development (RAD) features uses Spring Loaded.
There are no pre-requisites for this installation.
Spring Loaded is a Java agent (represented by a JAR file) that enables class reloading in a running JVM. It will enable you to update a Java file in your Alfresco extension project and then see the effect of the change directly in a running Alfresco-Tomcat-JVM instance without having to re-build JARs, AMPs, and WARs and re-deploying them, saving you loads of time.
- Download the Spring Loaded JAR from here.
Copy JAR to some directory.
There is no specific installation needed, just copy the JAR to a permanent place where you can refer to it.
You now have the Spring Loaded JAR readily available in a directory.