The link to the online training. I know I'm lazy, it's nearly 3 months ago I decided to take this online training course, but it's just today I started seriously. So I'm challenging myself to finish the 13 weeks online training within 2 weeks to cache up with others if any. To prove it, I'll post the progress and my homework. 1. Getting started Getting to know your Java programming environment 
myhelloproject2.zip is the finished project.
Java programming basics Difference about && and & is: & will evaluate the expression whether the 1st is true or false, so does | and ||. int i=0; boolean result= (i>0) && (++i>0); //here the result=false and i=0 since ++i was not evaluted result= (i>0) & (++i>0); //here result still false but i=1 
The finished project mygreatestvalueproject2
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