Vectors have different meanings depending on the context (Geometry, Physics, Calculus, Natural Sciences, etc). However, they do all seem to generally have a starting point, ending point and direction.
The Java Vector class seems to buck this mathmatical convention by providing a growable data structure.
https://en.wikipedia.org/wiki/Vector_(mathematics_and_physics)
https://docs.oracle.com/en/java/javase/24/docs/api/java.base/java/util/Vector.html