Question

I have the code shown below:

public VizCanvas(){
    {
        this.setBackground(Color.black);
        this.setSize(400,400);
    }
}

It worked fine and displays the panel in black background. But when I implement the paint method, which does nothing, the color changes to default color i.e gray.

I tried to set graphics.setColor() but it didn’t help.

Answer 1

You need to do a fill of the canvas to your background colour in the painting method. Something along the lines of:

g.setColor(Color.BLACK);
g.fillRect(0, 0, getWidth(), getHeight());

After that, draw whatever you need to. You could also try calling super.paint(g) in the paint method instead before doing anything.