snake applet gulp.='(

[xsouldeath]

problems
1. SNAKE DOESNT PRINT OR MOVE. confusion especially regarding the Snake class furthest below
2. id like the remove/add/grow to be checked.
thanks in advance

// The "Snake" class.
import java.applet.*;
import java.awt.*;
import java.awt.event.*;



public class SnakeGame extends Applet implements KeyListener, Runnable
{

Thread t;
int speed;
int x;
int y;
boolean eating;
int food;

Snake s;
Graphics g;
Color c;

/* start gets you to the run
*/
public void run ()
{

food = 0;
eating = false;
int x = 0;
// while (s.alive ())
// {

// if (food == 0)
// fp x = new fp ();
x = (int) (Math.random () * 9) + 1;
if (eating)
{
s.grow ();
//s.move()..?
food--;
if (food==0)
eating=false;
//s.drawString(750,750,"length of snake: "+s.length());
//for (double delay=0;double<speed;double++);
}

//else

//g.clearRect(10,700,10,700);
//}
//create a food point p SEMICOLON TERE RIGHT NOW...
// }
}


public void init ()
{
s = new Snake ();
setSize (800, 800);
t = null;
speed = 10000000;
addKeyListener (this);
reset (); //
run ();

}


public void paint (Graphics g)
{
// Place the body of the drawing method here
} // paint method


public void drawGrid ()
{
g = getGraphics ();
int Locx = 0;
int Locy = 0;
int Locx1 = 650;
int Locy1 = 0;
c = Color.green;
g.setColor (c);
while (Locx < 700)
{
sp x = new sp (Locx, Locy);
Locx++;
g.drawRect (Locx * 10, Locy * 10, 9, 9);
}
Locx = 0;
while (Locy < 700)
{
sp x = new sp (Locx, Locy);
Locy++;
g.drawRect (Locx * 10, Locy * 10, 9, 9);
}
Locy = 0;
while (Locy < 700)
{
sp x = new sp (Locx, Locy);
Locy++;
g.drawRect (690, Locy * 10, 9, 9);
}
Locx = 0;
while (Locx < 700)
{
sp x = new sp (Locx, Locy);
Locx++;
g.drawRect (Locx * 10, 690, 9, 9);
}

// Locx = 0;
// Locy1 = 0;
// while (Locy1 < 700)
// {
// sp x = new sp (Locx, Locy);
// Locy++;
// g.drawRect (Locx * 10, Locy * 10, 9, 9);
// }

}


public void reset ()
{
if (t != null)
t.stop ();
t = new Thread (this);
t.start ();
plot (g, c);
drawGrid ();
}


public void keyPressed (KeyEvent e)
{
int k = e.getKeyCode ();
if (k == KeyEvent.VK_DOWN)
s.changeDirection ('D');
else if (k == KeyEvent.VK_UP)
s.changeDirection ('U');
else if (k == KeyEvent.VK_LEFT)
s.changeDirection ('L');
else if (k == KeyEvent.VK_RIGHT)
s.changeDirection ('R');
}



public void keyTyped (KeyEvent e)
{
char k = e.getKeyChar ();
if (k == 's')
reset ();
else if (k == 'z')
speed += 100000;
else if (k == 'x')
speed -= 100000;
}


public void keyReleased (KeyEvent e)
{
}


public void plot (Graphics g, Color c)
{
g = getGraphics ();
c = Color.green;
g.setColor (c);
g.drawRect (x * 10, y * 10, 9, 9);
}


public sp up ()
{
sp z = new sp (x, y + 1);
return z;
}


public sp down ()
{
sp z = new sp (x, y - 1);
return z;
}


public sp left ()
{
sp z = new sp (x - 1, y);
return z;
}


public sp right ()
{
sp z = new sp (x + 1, y + 1);
return z;
}
} // Snake class


class SnakeNode
{
sp p;
SnakeNode next;

public SnakeNode ()
{
//IT MUST BE SET TO SOMETHING, BECAUSE 'never empty'? or maybe because always length 5..
next = null;
p = null;
}



}


/* class sp(SnakePoint Class)
*/
class sp
{
int direction;
int length;
int x;
int y;

public sp (int x, int y)
{
this.x = x;
this.y = y;
}


public int lengthR ()
{
return length;
}


public sp up ()
{
return new sp (x, y - 1);
}


public sp down ()
{
return new sp (x, y + 1);
}


public sp left ()
{
return new sp (x - 1, y);
}


public sp right ()
{
return new sp (x + 1, y);
}



public int getX ()
{
return x;
}


public int getY ()
{
return y;
}





public boolean equals (sp s)
{
return s.x == x && s.y == y;
}
}


class Snake
{
SnakeNode tail;
SnakeNode head;
// sp tail;
// sp head;
char direction;
int length;

public Snake ()
{
head = new SnakeNode ();
head.next = new SnakeNode ();
head.next.next = new SnakeNode ();
head.next.next.next = new SnakeNode ();
tail = new SnakeNode ();
head.next.next.next = tail;
length = 5;
//head.

// head.p = new sp (50, 50);
// head.next.p = new sp (50, 51);
// head.next.next.p = new sp (50, 52);
// head.next.next.next.p = new sp (50, 53);
direction = 'D';
//head=null;
// tail=null;


}


public boolean add ()
{
SnakeNode newNode = new SnakeNode ();
newNode.next = null;
if (empty ())
{
tail = newNode;
head = newNode;
}
else
{
head.next = newNode;
head = newNode;
}
return true;

}


public void grow ()
{
SnakeNode x = new SnakeNode ();
head.next = x;
head = x;

}


public void remove ()
{
if (!empty ())
tail = tail.next;
}


public void changeDirection (char s)
{
direction = s;
}



public int length ()
{
return length;
}


public SnakeNode head ()
{
return head;
}


public boolean empty ()
{
return tail == null && head == null;
}


public boolean onBody (sp q)
{
SnakeNode k = tail;
while (tail != head)
if (k.p.equals (q))
return true;
k = k.next;
return false;
}


public boolean onSnake (sp q)
{
SnakeNode k = tail;
if (q.equals (head.p))
return true;
while (tail != head)
if (k.p.equals (q))
return true;
k = k.next;
return false;
}


/* method alive
returns:boolean, true if snake is within bounds, and head is not on the body
*/
public boolean alive ()
{
if (!(head.p.getX () >= 0 && head.p.getY () >= 0 && head.p.getX () <= 700 && head.p.getY () <= 700))
return false;
else
{
SnakeNode l = tail;
while (l != head)
{
if (l.p.equals (head.p))
return false;
l = l.next;
}
}
return true;
}


public void move ()
{
grow ();
remove ();
}
}

[xsouldeath]

updated version:
// The "Snake" class.
import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class SnakeGame extends Applet implements KeyListener, Runnable
{

Thread t;
int speed;
int x;
int y;
boolean eating;
int food;

Snake s;
Graphics g;
Color c;

/* start gets you to the run
*/

// public void run ()
// {
// food = 0;
// eating = false;
// while (s.alive ())
// {
// System.out.println ("hi");
// }
// }


public void run ()
{
int theX;
int theY;
theX = (int) (Math.random () * 700);
theY = (int) (Math.random () * 700);
x = (int) (Math.random () * 9) + 1;
sp foodP = new sp (theX, theY);
while (s.onSnake (foodP))
{
theX = (int) (Math.random () * 700);
theY = (int) (Math.random () * 700);
foodP = new sp (theX, theY);
}
food = 0;
eating = false;
g = getGraphics ();
g.clearRect (0, 800, 0, 800);
// while (s.alive ())
// {
// g=getGraphics();
// //if (food == 0)
// //{
// g.drawString ("" + x, foodP.getX (), foodP.getY ());
// //}
//
// }
// int x = 0;

// while (s.alive ())
// {
//
// // if (food == 0)
// // sp x = new fp ();
// int theX;
// int theY;
// x = (int) (Math.random () * 9) + 1;
// sp q = new sp (theX, theY);
// while (s.onSnake (q))
// {
// theX = (int) (Math.random () * 700);
// theY = (int) (Math.random () * 700);
// q = new sp (theX, theY);
// }




if (eating)
{
s.grow ();
//s.move()..?
food--;

//s.drawString(750,750,"length of snake: "+s.length());
//for (double delay=0;double<speed;double++);
}
// else
// {
// g = getGraphics ();
// // s.move ();
// // g.drawString ("" + x,theX, theY);
// }
// if (food == 0)
// eating = false;
// if (s.onSnake (z))
// eating = true;
// //SnakeNode k = s.head;
// //sp u = new sp (500, 500);
//
// g = getGraphics ();
// // g.drawRect (s.head.p.x * 10, s.head.p.y * 10, 9, 9);
// // s.grow ();
// //System.out.println ("ITS X" + s.head.p.x);
// // System.out.println ("ITS Y" + s.head.p.y);
// // g.drawRect (s.head.p.x*10, s.head.p.y*10, 9, 9);
// // g = getGraphics ();
// // s.draw (g);
// // while (k != s.tail)
// // {
// // k = k.next;
// //
// // }
//
// g.drawString ("length " + s.length, 700, 300);
//}
//else

//g.clearRect (0, 800, 0, 800);
// }
// }


//}
//create a food point p SEMICOLON TERE RIGHT NOW...
// }
}


public void init ()
{
s = new Snake ();
setSize (800, 800);
t = null;
speed = 10000000;
addKeyListener (this);
reset (); //
run ();
}


public void paint (Graphics g)
{

// Place the body of the drawing method here
} // paint method


public void drawGrid ()
{
g = getGraphics ();
int Locx = 0;
int Locy = 0;
int Locx1 = 650;
int Locy1 = 0;
c = Color.green;
g.setColor (c);
while (Locx < 700)
{
sp x = new sp (Locx, Locy);
Locx++;
g.drawRect (Locx * 10, Locy * 10, 9, 9);
}
Locx = 0;
while (Locy < 700)
{
sp x = new sp (Locx, Locy);
Locy++;
g.drawRect (Locx * 10, Locy * 10, 9, 9);
}
Locy = 0;
while (Locy < 700)
{
sp x = new sp (Locx, Locy);
Locy++;
g.drawRect (690, Locy * 10, 9, 9);
}
Locx = 0;
while (Locx < 700)
{
sp x = new sp (Locx, Locy);
Locx++;
g.drawRect (Locx * 10, 690, 9, 9);
}

// Locx = 0;
// Locy1 = 0;
// while (Locy1 < 700)
// {
// sp x = new sp (Locx, Locy);
// Locy++;
// g.drawRect (Locx * 10, Locy * 10, 9, 9);
// }

}


public void reset ()
{
if (t != null)
t.stop ();
t = new Thread (this);
t.start ();
g = getGraphics ();
plot (g, c);
drawGrid ();
}


public void keyPressed (KeyEvent e)
{
int k = e.getKeyCode ();
if (k == KeyEvent.VK_DOWN)
s.changeDirection ('D');
else if (k == KeyEvent.VK_UP)
s.changeDirection ('U');
else if (k == KeyEvent.VK_LEFT)
s.changeDirection ('L');
else if (k == KeyEvent.VK_RIGHT)
s.changeDirection ('R');
}



public void keyTyped (KeyEvent e)
{
char k = e.getKeyChar ();
if (k == 's')
reset ();
else if (k == 'z')
speed += 100000;
else if (k == 'x')
speed -= 100000;
}


public void keyReleased (KeyEvent e)
{
}


public void plot (Graphics g, Color c)
{
g = getGraphics ();
c = Color.green;
g.setColor (c);
g.setColor (Color.blue);
g.drawRect (x * 10, y * 10, 9, 9);
}


public sp up ()
{
sp z = new sp (x, y + 1);
return z;
}


public sp down ()
{
sp z = new sp (x, y - 1);
return z;
}


public sp left ()
{
sp z = new sp (x - 1, y);
return z;
}


public sp right ()
{
sp z = new sp (x + 1, y + 1);
return z;
}
} // Snake class


class SnakeNode
{
sp p;
SnakeNode next;

public SnakeNode ()
{
//IT MUST BE SET TO SOMETHING, BECAUSE 'never empty'? or maybe because always length 5..
next = null;
p = null;
}


public SnakeNode (sp z)
{
p = z;
if (z.direction == 'D')
next = new SnakeNode (z.down ());
else if (z.direction == 'U')
next = new SnakeNode (z.up ());
else if (z.direction == 'L')
next = new SnakeNode (z.left ());
else if (z.direction == 'R')
next = new SnakeNode (z.right ());
//next = null;
}



}


/* class sp(SnakePoint Class)
*/
class sp
{
int direction;
int length;
int x;
int y;

public sp (int x, int y)
{
this.x = x;
this.y = y;
}


public int lengthR ()
{
return length;
}


public sp up ()
{
return new sp (x, y - 1);
}


public sp down ()
{
return new sp (x, y + 1);
}


public sp left ()
{
return new sp (x - 1, y);
}


public sp right ()
{
return new sp (x + 1, y);
}



public int getX ()
{
return x;
}


public int getY ()
{
return y;
}





public boolean equals (sp s)
{
return s.x == x && s.y == y;
}
}


class Snake
{
SnakeNode tail;
SnakeNode head;
// sp tail;
// sp head;
char direction;
int length;

public Snake ()
{
// head = new SnakeNode ();
sp q = new sp (100, 100);
head = new SnakeNode (q);
direction = 'D';
q = q.down ();
head.next = new SnakeNode (q);
q = q.down ();
head.next.next = new SnakeNode (q);
q = q.down ();
head.next.next.next = new SnakeNode (q);
q = q.down ();
tail = new SnakeNode (q);

// head.next = new SnakeNode ();
// head.next.next = new SnakeNode ();
// head.next.next.next = new SnakeNode ();
// tail = new SnakeNode ();
// head.next.next.next = tail;
length = 5;

//head.

// head.p = new sp (50, 50);
// head.next.p = new sp (50, 51);
// head.next.next.p = new sp (50, 52);
// head.next.next.next.p = new sp (50, 53);

//head=null;
// tail=null;


}


public boolean add (sp s)
{
SnakeNode newNode = new SnakeNode (s);
newNode.next = null;
if (empty ())
{
tail = newNode;
head = newNode;
}
else
{
head.next = newNode;
head = newNode;
}
return true;

}


public void grow ()
{
if (direction == 'D')
add (head.p.down ());
else if (direction == 'U')
add (head.p.up ());
else if (direction == 'L')
add (head.p.left ());
else if (direction == 'R')
add (head.p.right ());

}


public void draw (Graphics g)
{
SnakeNode k = tail;
while (k != head)
{
g.setColor (Color.red);
g.drawRect (k.p.x * 10, k.p.y * 10, 9, 9);
k = k.next;
}
}


public void remove ()
{
if (!empty ())
tail = tail.next;
}


public void changeDirection (char s)
{
direction = s;
}



public int length ()
{
return length;
}


public SnakeNode head ()
{
return head;
}


public boolean empty ()
{
return tail == null && head == null;
}


public boolean onBody (sp q)
{
SnakeNode k = tail;
while (k != null && k != head)
{
if (k.p.equals (q))
return true;
k = k.next;
}
return false;
}


public boolean onSnake (sp q)
{
SnakeNode k = tail;
if (q.equals (head.p))
return true;
while (k != null && k != head)
{
if (k.p.equals (q))
return true;
k = k.next;
}
return false;
}


/* method alive
returns:boolean, true if snake is within bounds, and head is not on the body
*/
public boolean alive ()
{
if (!(head.p.getX () >= 0 && head.p.getY () >= 0 && head.p.getX () <= 700 && head.p.getY () <= 700))
return false;
else
{
SnakeNode l = tail;
while (l != head.next && l.next != null)
{
if (l.p.equals (head.p))
return false;
if (l.next != null)
l = l.next;
}
}
return true;
}

public void move ()
{
grow ();
remove ();
}
}

[destin]

Well... nothing's being drawn because you have nothing in the paint( Graphics ) method... add drawGrid(); in there to start. And i don't see anywhere where you'd be drawing the snake..