Creating HashMap of point(x,y) and ArrayList in java
I have to make a HashMap of point and Array-list. point is nothing but the pair of x and y in x-y plain.
then i want to store all student’s roll no. which are there at that specific point.
I have to make a HashMap of point and Array-list. point is nothing but the pair of x and y in x-y plain.
then i want to store all student’s roll no. which are there at that specific point.