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2
votes
0answers
71 views

Determine exact coordinates for a map image?

My brother suggested that I should write a web app that lets students create and print blank maps. A blank map is a map that contains country borders, waters etc. but no text labels. The first use ...
-3
votes
0answers
102 views

Why HashMap is faster than HashSet?

A HashMap takes the key-element, make a hashCode() of it and puts the new hashcoded value back into array[index]. A HashSet takes the obj, uses its hashCode() and puts it back into an array[index]. ...