Knowledge that Java programmers should update

2013:

Common Library of Java knowledge you should update (i)

Common Library of Java knowledge you should update (ii)

Observer of Java knowledge you should update

You should update the collection of Java knowledge to initialize

You should update the Java Knowledge Collection operation

You should update the lazy evaluation of Java knowledge

Optional of Java knowledge you should update

Optional advanced usage of Java knowledge you should update

You should update the immutable collection of Java knowledge