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  1. #1
    Mazharul is offline Member
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    Aug 2008
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    Default Vector<Point2D> list = new Vector<Point2D>();Is it possible for 15,000 Point2D obj???

    Considering only fore-ground pixels co-ordinate, I want to extract only those points that will form a Convex Hull according to Graham Scan algo.So,firstly I want to insert all fore-ground pixels co-ordinate into a vector which will be by "Vector<Point2D> list = new Vector<Point2D>();,for about 15,000 co-ordinates".Is it vaild or possible using type "Point" or "point2D" objects. Latter ,for the reason of backtracking I have to use "Stack<Point2D>".
    Again is it poosible for about 15,000 Point2D objects? Also I have some calculation taking (x,y) form particular point from stack
    If possible plz help me for:
    1)what is the syntax for how about 15000 co-ordinates will be inserted in using "vector<Point2D> "?(I have image raw data[][] and i want to use that).

    2) How stack is used to insert Point2D class objects (suppose number of objects is 15,000)integer co-ordinate in the form Stack<Point2D>
    ...........SORRY for bothering and many many thanks for helping me many times earlier...

  2. #2
    mtyoung is offline Senior Member
    Join Date
    Dec 2008
    Hong Kong
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    stack is subclass of vector... if vector can, stack can

    i think it is ok for vector to have 15000 elements
    vector store objects, so it is possible to store Point or Point2D

    you need to declare and initialize a Vector by default constructor Vector() or Vector(int initialCapacity) etc... read API
    add element add method, addAll method etc, read API
    Vector (Java Platform SE 6)

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