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Thread: Java Program that plots point on a graph..need some help.

  1. #1
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    Default Java Program that plots point on a graph..need some help.

    Hey fellas I need some help writing a program that plots two points on a graph in point intercept form in (x,y). I have recently programmed a times table program. i just don't understand how to graph points.
    thanks for your help!

  2. #2
    Member snowguy13's Avatar
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    Default Re: Java Program that plots point on a graph..need some help.

    What you could do is draw points on a JPanel or other JComponent by editing that component's paintComponent() method. In this case, you would simply use the x, y coordinates and that would translate onto the panel (ie, the point (50, 100) would be used to draw a dot 50 px from the top of the panel and 100 from the left). Note that using this method, y grows larger as you move DOWN the panel (so you'd have to invert the y coordinate).

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  3. #3
    Super Moderator Norm's Avatar
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    Default Re: Java Program that plots point on a graph..need some help.

    how to graph points.
    In the paintComponents() method you can use the Graphics class's drawOval method to draw a point.
    Look at the other methods of the Graphics class to see if there are other's that might help you.

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