Pictures in a JPanel

Question

I'm trying to write an application where I want to add different pictures on a Jpanel. Everything works fine except for the JPG format which displays very bad quality images. This is how I do the drawing :

class draw extends Canvas 
{
    Dimension canvasSize = new Dimension(400, 400);
    String fileName;

    public void paint(Graphics g) 
    {       
        if(this.fileName!=null)
        {
            Toolkit toolkit = Toolkit.getDefaultToolkit();
            Image img = toolkit.getImage(fileName);
            g.drawImage(img, 0, 0, this);
        }                   
    }
    public void setFileName(String name)
    {
        this.fileName=name;
    }

    public Dimension getMinimumSize()
    {
        return canvasSize;  
    }

    public Dimension getPreferredSize()
    {   
        return canvasSize;
    }
}

Is there a way such that JPG format is covered ?

Answer 1

This is probably because you're stretching (or compressing) the image to the size of the canvas. JPEG images don't look great when you scale them, particularly if you're scaling up. Try an image that's the same size as (or close to) your canvas. You can also get the height and width of the JPEG from the Image class and display it in its original dimensions. Sun's Drawing an Image tutorial shows how to do this.