@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 ...

Because Runnable is an interface, any class can implement that interface by attaching an implements clause to the class header and by providing an appropriate run() method.

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 ...