Brian Goetz explains how lambda expressions are implemented using the invokedynamic instruction introduced in Java SE 7.
Gunnar Hillert introduces WebSocket, the protocol and the corresponding W3C API, with an emphasis on the JSR-356 defining the Java EE 7 API.
Arun Gupta demoes some of the new features introduced or enhanced in Java EE 7: HTML5, JAX-RS 2, JMS 2, Batch Processing and Caching API, WebSocket, etc.
Reza Rahman shows code samples for some of the APIs coming in Java EE 7, such as JMS 2, WebSocket, JSON, JAX-RS 2, JPA 2.1, JTA 1.2, etc. and takes a peek at Java EE 8 features to be expected.