CODEWITHSUNDEEP
javaswingjpanelgraphics2d
user2733638
user2733638

Reputation: 19

Java 2D graphics - drawing a rectangle

So I am quite new to Java programming and programming in general and please excuse my lack of knowledge. I am trying to draw a simple rectangle on the screen with some given coordinates.

Here is my code in the Drawer Class:

public class Drawer extends JPanel {

public static void drawPixel(Graphics g, int x, int y) {
    g.fillRect(x, y, 5, 5);
}

}

And here is the code I am trying to use in the main class:

Drawer drawer = new Drawer();
Drawer.drawPixel(Graphics g, i9, i10);

So I really don't understand what the first argument is for. It gives me an error saying it can't resolve "Symbol g". i9 and i10 are the coordinates I want it to draw the rectangle at.

Thanks in advance for any help. :)

Upvotes: 1

Views: 955

Answers (3)

Hyden
Hyden

Reputation: 299

Some of your code isn't right like Graphics g. I'm not going to go over it since others have but I recommend you look at some tutorials. If your new to java overall then check out:

video

You should check out that video series, it teaches you a solid understanding of the java syntax and basics. Then after that you can start checking out tutorials like this:

video

That one teaches you a really good solid understanding of making complicated games in Java. I recommend even intermediate and advanced Java programmer to check it out. When I started I looked at other tutorials and they mainly stopped halfway through, had terrible mistakes or something like that. This video teaches it a whole simpler way.

Upvotes: 0

user2110286
user2110286

Reputation:

You can not draw something like that. You should use paintComponent() method to draw.

Check this:

public class RectDrawer extends JPanel {
    private int x;
    private int y;
    public RectDrawer(int x, int y){
        this.x = x;
        this.y = y;
    }
    public void paintComponent(Graphics g) {
        g.fillRect(x, y, 5, 5);
    }
}

Upvotes: 4

Surveon
Surveon

Reputation: 723

Drawer.drawPixel(Graphics g, i9, i10); is probably the source of your issue.

You are passing (as the first argument) something along the lines of Graphics g. Consider just passing g by itself without the Graphics bit - that should solve your problem.

The Graphics g object refers to the graphical context - this is what effectively draws stuff onto the screen. By calling methods on it, you can then literally draw things where a user can see them.

Using JPanel as an example, you can override its paintComponent() method. You'll notice this method takes in a Graphics object - you can then use this to draw stuff in the panel.

Upvotes: 1

Related Questions