How to select a line

Question

So I\'m trying to figure out how to implement a method of selecting lines or edges in a drawing area but my math is a bit lacking. This is what I got so far:

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Answer 1

If you use the 2D api then this is already taken care of.

You can use Line2D.Double class to represent the lines. The Line2D.Double class has a contains() method that tells you if a Point is onthe line or not.