Java for ever

http://introcs.cs.princeton.edu/java/10elements/

http://www.oracle.com/technetwork/java/index-138747.html

https://en.wikipedia.org/wiki/Java_(programming_language)

https://www.coursera.org/specializations/java-programming

https://www.codecademy.com/learn/learn-java

https://www.ibm.com/developerworks/java/tutorials/j-introtojava1/

https://en.wikibooks.org/wiki/Java_Programming

http://courses.caveofprogramming.com/p/java-for-complete-beginners

https://www.java.com/en/download/faq/develop.xml