Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

Additional ListIterator Methods. As of the Java 17 release, there are four methods in the ListIterator interface not found in the more abstract Iterator:. hasPrevious() - returns the previous object ...

Java SE 10 (March 2018) introduced type inference for local variables. Java Language Architect Brian Goetz explains the feature. BT. ... Don't worry too much about "programming to the interface." ...

Method and variable handles vs. Java reflection. To truly understand MethodHandles and VarHandles—what they do and why they are useful—it’s helpful to know a few things about reflection in Java.