Question

I am beginning in java (I’m learning in microedition) and I got this error: “int cannot be dereferenced” in the following class:

class DCanvas extends Canvas{
    public DCanvas(){

    }

    public void drawString(String str, int x, int y, int r, int g, int b){
        g.setColor(r, g, b); //The error is here
        g.drawString(str, x, y, 0); //and here
    }

    public void paint(Graphics g){
        g.setColor(100, 100, 220);
        g.fillRect(0, 0, getWidth(), getHeight());
    }
}

What am I doing wrong here?
Well I came from PHP and ECMAScripts where I was able to pass my function arguments this way so I really don’t understand this error.

Answer 1

The g in drawString is the color value you’ve passed in, not your Graphics reference. So the error is when you’re trying to call a method on an int, which you can’t do.

//            Passing an integer 'g' into the function here |
//                                                          V
public void drawString(String str, int x, int y, int r, int g, int b){
//  | This 'g' is the integer you passed in
//  V
    g.setColor(r, g, b);
    g.drawString(str, x, y, 0);
}