The Java Tutorials have been written for JDK 8. Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available.
See Java Language Changes for a summary of updated language features in Java SE 9 and subsequent releases.
See JDK Release Notes for information about new features, enhancements, and removed or deprecated options for all JDK releases.
JAXP 1.5 provides new properties to give controls of fetching external resources to users. The use of the new properties is the same as with other existing properties, except that the properties are provided with corresponding system properties and jaxp.properties so that they can be used for system-wide restrictions or permissions.