This week's book giveaway is in the Java in General forum. We're giving away four copies of Think Java: How to Think Like a Computer Scientist and have Allen B. Downey & Chris Mayfield on-line! See this thread for details.
I know both , compo and aggre are types of associations between classes. I know that composition is a strong relation .. aggre is a weak one..
eg. There is College, Departments, and Professors..
College class has a strong relation with Departments as the departments dont have individual existence..
But it has weak relation with Professors... Even after college is destroyed Professors may exist..
Please explain using a coding example how do we implement Composition and ho w do we implement aggregation ?