The source code provided with demos for the JDK is meantto illustrate the usage of a given feature or technique and has beendeliberately simplified. Additional steps required for aproduction-quality application, such as security checks, inputvalidation, and proper error handling, might not be present in thesample code.In some cases, the default security settings may block an executionof demo applets in a browser. To adjust the security settings, pleaserefer to the following resource:http://java.com/en/download/help/java_blocked.xmlSome demo applets need to be accessed through the HTTP or HTTPSprotocols to enable access to the required resources.