import java.awt.*;
import javax.swing.JApplet;
import java.util.*;
import java.awt.image.*;
import javax.imageio.*;
import java.net.*;
import java.awt.event.*;

/**
* Demonstates how to write a Java Applet that can be run in a web browser
* 
* @author Pete Nordquist 
* @version 120212 - now use component's width and height and an instance-level
* Random number generator
* @version 100127 - updated for <object> tag example and added JApplet
* @version 040415 - original
*/
public class GreenSnake extends JApplet implements KeyListener
{
	/* HelloApp instance variables */
	// declare a Random number generator
	Random rg = new Random();
	private int score;
	private int snakeX;
	private int snakeY;
	private int blockSize = 20; // size of snake blocks and mice
//	private String s;

	/**
	* Called immediately after the applet starts.
	* Purpose is to initialize values that will be used by the paint method.
	*/
	public void init()
	{
// 		s = this.getParameter("STODRAW");
// 		BufferedImage img = 
// 			ImageIO.read(new URL(getCodeBase(), "Sunset.jpg"));
		score = 0;
		snakeX = 0;
		snakeY = this.getHeight() - blockSize;
		this.addKeyListener(this);
	}

	/**
	* Called after the init() method and called everytime the applet needs to display itself.
	* Purpose is to draw the image the user sees.
	* (paint() is executed in a different thread than init().)
	* @param g the Graphics context in which the drawing takes place.
	*/
	public void paint(Graphics g)
	{
		// draw snake
		g.setColor(Color.white);
		g.fillRect(0,0, this.getWidth(), this.getHeight());
		g.setColor(Color.green);
		g.fillRect(snakeX,snakeY,blockSize,blockSize);

// 		// display string at point 50 pixels to the right and 50 pixels down from the upper left corner
// 		g.setColor(Color.BLACK);
// 		// if the applet is begin run in the appletViewer, the getParameter() call in init()
// 		// will return null, so assign a default string if s == null.
// 		if (s == null)  
// 			s = "Default string";
// 		g.drawString(s, 50, 50);
// 		// append " - OK" to s and draw it again in the middle of the screen
// 		s = s + " - OK";
// 		g.drawString(s, width / 2, height / 2);
	}
	
	public void keyPressed(KeyEvent ke)
	{
		// if the up arrow was pressed
		if (ke.getKeyCode() == KeyEvent.VK_RIGHT)
		{
			// set position one block to the right
			snakeX = snakeX + blockSize;
			repaint();
		}
	}
	public void keyReleased(KeyEvent ke) {}
	public void keyTyped(KeyEvent ke) {}
	
}