Resize drawing to match frame size

Question

I\'ve written an app that custom draws everything inside paint() based on fixed pixel positions. Then I disabled resize of the frame so its always visible.

However,

Answer 1

You could do this with some math.

public void paint(Graphics g){
    int height = 100;
    int width = 100;

    int x = (this.getWidth() / 2) - (width / 2);
    int y = (this.getHeight() / 2) - (height / 2);

    g.setColor(Color.BLACK);
    g.fill3DRect(x, y, width, height, true);

}

Or if you wanted to keep the width and height of the box with the same proportion, use int width = this.getWidth() / 3; and int height = this.getHeight() / 3.

The other option is to use Graphics2D.scale(), as JB pointed out, the passed Graphics object is actually a Graphics2D object.