@FunctionalInterface public interface Runnable { public abstract void run(); } The class library annotates Runnable with @FunctionalInterface, which is an instance of Java 8’s new java.lang ...

public interface Runnable { public abstract void run(); } The class library annotates Runnable with @FunctionalInterface, which is an instance of the java.lang.FunctionalInterface annotation type.

Runnable, the “YouTube of Code” which launched exactly three months ago, today announced support for a number of new languages, as well as extended support for companies and open source ...