If you use any Java internal APIs in your code, it is time to stop. And if you don't stop on your own, Oracle will stop it for you.

Oracle has extended public updates for Java Development Kit (JDK) 8 until at least January 2019. These had been slated to end in September 2018.

Oracle has proposed several new implementation milestones for version 8 of the Java Development Kit (JDK 8), beginning with Milestone 1 on April 24 and ending with Milestone 6 on Jan. 30, 2013.

As I was thinking about the remaining differences between Java interfaces and abstract classes in a JDK 8 world, I decided to see what the Java Tutorial had to say on this.

Some developers try and change the Java compiler setting within Eclipse from Java 1.5 to Java 1.8, but that only works temporarily. As soon as a new Maven build takes place, the JDK version reverts ...