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Help with an error?

Here is the error I get:

java.lang.StackOverflowError
    at apple.awt.CGraphicsDevice.getScreenInsets(Native Method)
    at apple.awt.CGraphicsDevice.getScreenInsets(CGraphicsDevice.java:673)
    at apple.awt.CToolkit.getScreenInsets(CToolkit.java:741)
    at java.awt.Window.init(Window.java:394)
    at java.awt.Window.<init>(Window.java:432)
    at java.awt.Frame.<init>(Frame.java:403)
    at java.awt.Frame.<init>(Frame.java:368)
    at javax.swing.JFrame.<init>(JFrame.java:158)
    at D3D.<init>(D3D.java:35)
    at player.<init>(player.java:1)
    at D3D.<init>(D3D.java:17)
    at player.<init>(player.java:1)

And here is the player class:

public class player extends D3D
{
  int playerX, playerY;
  boolean east, west, south, north;
  public void setPlayer()
  {
    playerX = 1; playerY = 1;
    east=true; west=false; north=false; south=false;
  }
}

And here is the D3D class:

public class D3D extends JFrame
{
  player player = new player();
  mapgeneration levelmap = new mapgeneration();
  boolean ONE, TWO, THREE, FOUR, FIVE;
  boolean ONEhighlight,TWOhighlight,THREEhighlight,FOURhighlight,FIVEhighlight;
  Timer timer = new Timer(250,new ActionListener() {
    public void actionPerformed(ActionEvent evt) {
      repaint();
    }
  });

  String tracer;

  Image Example = Toolkit.getDefaultToolkit().getImage("images/example.png");
  Image Startup = Toolkit.getDefaultToolkit().getImage("images/Startup.png");
  Image ButtonHighlight = Toolkit.getDefaultToolkit().getImage("images/ButtonHighlight.png");

  public D3D()
  {
    super();
    setSize(342,277);

      ...
    JPanel main = new JPanel()
    {
      public void paintComponent(final Graphics g)
      {
        super.paintComponent(g); 
        timer.start();
        g.drawImage(Startup,0,0,this);
        ...
      };
    };
    add(main);
  }
  public void init()
  {
    player.setPlayer();
    levelmap.populateGraph();
  }
  public static void main(String[] args)
  {
    D3D game = new D3D();
    game.setTitle("Dungens:3D");
    game.init();
    game.setVisible(true);
  }
}

I looked at it for hours and narrowed it down to what you see here. Honestly, this is probably some kind of stupid little thing that I look through.

Thanks guys.

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1 answer

I see your problem. Your Player class extends your D3D GUI - causing a kind of crazy loopback. This will result in recursion as you cyclically continue to create players and D3D objects.

To prove that I'm right, just run this very simple version of your code:

public class D3D {
   Player player = new Player();

   public static void main(String[] args) {
      D3D game = new D3D();
   }
}

class Player extends D3D {

}

, D3D , Player, D3D, Player, , , D3D, Player .

, Player GUI, gui; .

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