using a frame inside an applet

[Mike Smith]

Hello, good day.

I am currently trying to use a class that extends Frame (taken from a text). This class acts as a drawing surface. My goal is create an applet using the Slate class, however, I have not been successful with it. First is this possible? or is there some kind of conflict between invoking paint(). My ultimate goal is to draw the graphics using slate instead of overriding paint in applet and then to create an animated applet. I would assume that creating a new Frame instead a applet would be possible. Any thoughts, greatly appreciated.

/**
 * class Slate
 * 
 * purpose: to create graphic images using the abstract window toolkit.
 *          from Downey, Allen;  How to Think Like a Computer Scientist
 */ 
 
import java.awt.*;
 
public class Slate extends Frame {
    // data field, image, is a buffer: when Slate users draw things, they draw on the buffer.  
    // When the Slate gets painted, we copy the image onto the screen.
    Image image;
    
    // Constructor for objects of class Slate
    public Slate(int width, int height) 
    {
        setBounds(100,100,width, height);
        setBackground(Color.white);
        setVisible(true);
        image = createImage(width, height);
    }
    
    // when a Slate user asks for a Graphics object, we give them one from the off-screen
    // buffer.
    public Graphics getSlateGraphics() 
    {
        return image.getGraphics();
    }
    
    // normally update erases the screen and invokes paint, but since we are overwriting the
    // whole screen anyway, it is slightly faster to override update and avoid clearing the
    // screen.
    public void update (Graphics g) 
    {
        paint(g);
    }
    
    // paint copies the off-screen buffer onto the screen
    public void paint(Graphics g) 
    {
        if (image ==null) 
            return;
        g.drawImage(image,0,0,null);
    }
    
    //wait for t units of time (milliseconds?) 
    //this method is useful when doing simple animation
    public void wait(int t) {
        try 
        {  Thread.sleep(t);  } 
        catch (InterruptedException e) 
        {  return;           }
    }
    
}

[Ulf Dittmer]

Yes, applets can open Frame windows. When you say "I have not been successful with it", what exactly does that mean? Is the window not opened? Does the painting not occur? TellTheDetails of how you're using this class.