I am given one assignment from our institution.Such as below.
Create an online petal shop using core java and collection APIs(Shopping cart)
1. Create different screens,such as welcome screen,list of flowers category,sub category.
2. Select flowers ang then,when you go back,while check out,it will sum and give .
3. output-order delivery--it should ask address,phone number,etc.
Note-Prerequisite for this question: Thorough knowledge of collection APIs and very good logical thinking.