make code pretty
refactor. rename
make code pretty
introduce static factory. a good one.
refactor-rename.
refactor-rename.
add some small utils and applied to somethings.
introduce static factory method
add a test util.
apply the simple test util
introduce static factory methods
add sort example
refactoring. in methods, use end rather than size
Merge branch 'master' of https://github.com/psjava/psjava.git
fix mistake. remove CNAME