Java Tutorial https://docs.oracle.com/javase/tutorial/jaxp/intro/index.html, in particular, https://docs.oracle.com/javase/tutorial/jaxp/intro/sample.html, contains a link to jaxp.java.net. As java.net is shut down, this link will be broken. One option to resolve the issue would be to include the sample in the tutorial instead of linking to jaxp.java.net.

Similar situation in this tutorial where it suggests download the JAXP samples from jaxp.java.net:
https://docs.oracle.com/javase/tutorial/jaxp/sax/index.html