How to fill a polygon in java?

Question

I have one little problem.. I am actually doing a program in java (it's a GUI). There is one class named Map that in which I creat a map..(or atleast I am trying).The constructor initializes the map and it gives back an Area and I paint it in the View class. I tried the classical way to do it with g2.fillPolygon(x[],y[],n) but it does not works. Here is the source code:

public class Map{
    Area area;
    //...
    public Map(){
        this.area=new Area(new Polygon(
                arrayX(),//ArrayY() and arrayX() are methods that generate     arrays with random numbers
                arrayY(),
                MAX
                ));
   }

//...stuff
}

Here is the View class:

public class View extends JComponent{
    Map map=new Map();

//...stuff

public void paintComponent(Graphics g) {
    super.paintComponent(g);
    Graphics2D g2 = (Graphics2D) g;
//.......

    g2.draw(map.area);//this draws the normal polygon NOT filled
    g2.fillPolygon(map.ArrayX,map.arrayY,map.MAX);//this might fill the polygon but it does noot
    g2.fillPolygon(map.area);//this does not work (ofcourse) because it wants a Polygon type parameter. I tried to cast it but it still does not work.
}
}

What shall I do in this case? Thank you very much.

Side note: don't name your class/type with names which are already used by Java, like `Map` `List` `Set` `Object` `Character`. — Pshemo, Feb 12 '16 at 23:17
I believe you need a Paint object passed to the fillPolygon method. And that paint object would have fill attributes and color etc. — Batdude, Feb 12 '16 at 23:18
This might help: http://stackoverflow.com/questions/2047573/how-to-draw-filled-polygon — Batdude, Feb 12 '16 at 23:19
@Pshemo I know it! in fact it does not names like that!! It is in Italian but I changed it to English to post it here :) — , Feb 12 '16 at 23:21
`Graphics2D#fill`, just like you used `draw`, but with `fill`... — MadProgrammer, Feb 12 '16 at 23:35
@MadProgrammer you are a genius!!!!! thank you very much!! :) — , Feb 12 '16 at 23:41

score 3 · Accepted Answer · answered Feb 12 '16 at 23:49

3

Just like the Graphics2D#draw(Shape) method, there is a Graphics2D#fill(shape) method.

g2.setColor(Color.BLUE);
g2.fill(map.area);
g2.setColor(Color.RED);
g2.draw(map.area);

You might like to have a look at 2D Graphics for more details

answered Feb 12 '16 at 23:49

MadProgrammer

343,457
22
230
366

How to fill a polygon in java?

1 Answers1