You can download a binary, ready to use, build of openJDK for windows from: http://jdk7.java.net/java-se-7-ri. Happy openJDK-ing!.
NEW workshop: Building HTML 5 Applications With Angular 2
Full week in December 2016: from Java EE 7 Bootstrap, Effective, Architectures over Testing to Microservices
On demand workshops: Java EE 7: Bootstrap, Effective, Testing and Microservices available for streaming.