I wonder how nobody noticed it, but either way, it's terrible!

I was just trying to add Graphics2D to a Frame this way:

Game.java
import java.awt.Component;

public class Game
{
public static void main(String[] args)
{
MainFrame mainFrame = new MainFrame();
MainGraphics mainGraphics = new MainGraphics();
mainFrame.getContentPane().add(mainGraphics);
}
}
That file contains the main function, where I create a new frame and a new graphics (both classes made in separate files), and then I try to add the graphics to the frame.

The problem is, though, I get:

Exception in thread "main" java.lang.Error: Unresolved compilation problems:
   Cannot instantiate the type MainGraphics
   The method add(Component) in the type Container is not applicable for the arguments (MainGraphics)

I can only add components to frames and content panes.

So I tried to make mainGraphics a component, like this:

Component mainGraphics = new MainGraphics();
However, I get (in this line):

Exception in thread "main" java.lang.Error: Unresolved compilation problems:
   Type mismatch: cannot convert from MainGraphics to Component
   Cannot instantiate the type MainGraphics

Does anybody know how to solve this? Thanks! Also, MainGraphics is an abstract class, here's its code:

import java.awt.Graphics2D;


public abstract class MainGraphics extends Graphics2D {
public MainGraphics()
{
this.create();
this.drawLine(5, 5, 10, 10);
}
}


Looking great hoffa! I'd love some project like this, I have no idea of how you managed to make it too.

What calculator is this for?

http://www.ticalc.org/archives/files/fileinfo/432/43266.html

I have made something with formulas, and it's open-source so you can check it out

You can still play the games on an emulator, and some of them, like DT's work in the document player.

I think all of them work in the Document Player.

Great work! Just a suggestion, though: to make it look better, move the "TNS Filename" input box so it lines up horizontally with the one above it, and extend both to the end of the window.

Thanks for the suggestion!

I already made it:

Well Adriweb, I'm not Juju but I don't know how "legal" it is to submit an entry after the time is over. I have, though, played the game and it looks good, nice job.