Example Code for lesson from http://nguyenvantien2009.com/category/tai-lieu/java-basic/
This chapter help us learn Data Type and Java Syntex: Variable, Data Type, Casting, Operation, Comment in Java.
Code resource: https://github.com/tiennguyen2009/java-basic/tree/master/src/com/tiennguyen/chapter_2/
Code resource: https://github.com/tiennguyen2009/java-basic/tree/master/src/com/tiennguyen/chapter_3
Code resource: https://github.com/tiennguyen2009/java-basic/tree/master/src/com/tiennguyen/chapter_4