Each release of the JDK brings forth new enhancements and capability to the Java platform. Each release also carries with it backward compatibility with previous releases. This book includes a number of recipes covering the new features for Java 9, and this chapter showcases a few of the top enhancements to whet your appetite. By no means is this chapter a complete listing of all Java 9 enhancements. Rather, it is a jump start to get you going on some of the hot new features of Java 9.
2-1. Avoiding Redundancy in Interface Code
You would like to implement two or more default methods within an interface that ...