DocCheck reports and grep confirms references to dead pages on java.sun.com. While the domain still exists, it simply redirects to a generic top level page for Java.

*** http://java.sun.com/products/jfc/tsc/articles/text/element_interface
open/src/java.desktop/share/classes/javax/swing/text/Document.java: * <a href="http://java.sun.com/products/jfc/tsc/articles/text/element_interface">
build/linux-x86_64-server-release/images/docs/api/java.desktop/javax/swing/text/Document.html: <a href="http://java.sun.com/products/jfc/tsc/articles/text/element_interface">

*** http://java.sun.com/products/jfc/tsc/articles/timer/
open/src/java.desktop/share/classes/javax/swing/Timer.java: * <a href="http://java.sun.com/products/jfc/tsc/articles/timer/"
build/linux-x86_64-server-release/images/docs/api/java.desktop/javax/swing/Timer.html: <a href="http://java.sun.com/products/jfc/tsc/articles/timer/" target="_top">Using Timers in Swing Applications</a>,