http://www.ibm.com/developerworks/cn/java/j-5things2.html
http://www.ibm.com/developerworks/cn/java/j-5things3.html
https://www.ibm.com/developerworks/cn/java/j-5things4.html
http://www.ibm.com/developerworks/cn/java/j-5things5.html
http://www.ibm.com/developerworks/cn/java/j-5things6.html
http://www.ibm.com/developerworks/cn/java/j-5things7.html
http://www.ibm.com/developerworks/cn/java/j-5things8.html
http://www.ibm.com/developerworks/cn/java/j-5things9.html