Thread: Keyboard imput not working!

My Keyboard imput doesn't seem to work and i don't know why. The program is a little lengthy and I'm sorry about that. I'd really appreciate an answer.

-Main-

/* This code was produced by Kevin Spaeth.
 * Please do not use without permission.
 * Copyright May, 2011. Sp333th Productions.
 */
 
import java.applet.*;
import java.awt.*;
 
public class Main extends Applet implements Runnable {
 
	//Keys
	private boolean keyLeft;
	private boolean keyRight;
	private boolean keySpace;
	//Images
	private Image Greenman1;
	private Image Greenman2;
	private Image Greenman3;
	private Image Greenman4;
	private Image Greenman5;
	//Thread used for the game.
	private Thread gameThread;
	//Used for double-buffering.
	private Image dbImage;
	private Graphics dbGraphics;
	//Greenman enters!
	private Player Greenman;
 
	public void init() {
 
		//Sets the applet size.
		setSize(Constants.applet_width, Constants.applet_height);
		//Sets the name of the applet.
		setName(Constants.applet_name);
		//Gets the player images.
		getImages();
		//Initializes the player.
		Greenman = new Player(300,300,this);
 
		//Sets keys to be false initially.
		keyLeft = false;
		keyRight = false;
		keySpace = false;
 
		//Sends images to the player class.
		Greenman.setImages(Greenman1, Greenman2, Greenman3, Greenman4, Greenman5);
	}
 
	public void start() {
 
		//Create a new thread.
		gameThread = new Thread(this);
		//Start thread.
		gameThread.start();
	}
 
	public void run() {
 
		//GreenMan is REAL important!
		Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
 
		//Loops the run part of the string.
		while(true) {
 
			//Helps to keep the applet from being resized.
			setSize(Constants.applet_width, Constants.applet_height);
 
			Greenman.playerMove();
 
			//Repaints the graphics.
			repaint();
 
			try {
				//Sleep for the game frame rate.
				Thread.sleep((1000/Constants.applet_framerate));
			}
			catch(InterruptedException gameException) {
				System.out.println("Error occourred inside of the run loop.");
				//Don't do anything.
			}
			//Ensures that this thread still has the max priority.
			Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
		}
	}
 
	public void stop() {
 
		//Handles stopping the thread.
		gameThread.stop();
	}
 
	public void destroy() {
 
		//Handles stopping the thread.
		gameThread.stop();
	}
 
	public void paint (Graphics gameGraphics) {
 
		Greenman.paintPlayer(gameGraphics);
		gameGraphics.drawImage(Greenman1, 200, 200, this);
	}
 
	public void update (Graphics gameGraphics) {
 
		//This code is used to help double-buffer the enviornment.
		if (dbImage == null)
		{
			dbImage = createImage (this.getSize().width, this.getSize().height);
			dbGraphics = dbImage.getGraphics ();
		}
 
		dbGraphics.setColor (getBackground ());
		dbGraphics.fillRect (0, 0, this.getSize().width, this.getSize().height);
 
		dbGraphics.setColor (getForeground());
 
		paint(dbGraphics);
 
		gameGraphics.drawImage (dbImage, 0, 0, this);
	}
 
	private void getImages() {
 
		//Mediatracker picks up images.
		MediaTracker tracker = new MediaTracker(this);
 
		Greenman1 = getImage(getCodeBase(), "Sprites/GreenmanRun-01.png");
		tracker.addImage(Greenman1, 1);
		Greenman1 = getImage(getCodeBase(), "Sprites/GreenmanRun-02.png");
		tracker.addImage(Greenman2, 2);
		Greenman1 = getImage(getCodeBase(), "Sprites/GreenmanRun-03.png");
		tracker.addImage(Greenman3, 3);
		Greenman1 = getImage(getCodeBase(), "Sprites/GreenmanRun-04.png");
		tracker.addImage(Greenman4, 4);
		Greenman1 = getImage(getCodeBase(), "Sprites/GreenmanRun-05.png");
		tracker.addImage(Greenman5, 5);
 
		//Makes sure that all images are properly loaded.
		try {
			tracker.waitForAll();
		}
		catch (Exception exception) {}
	}
 
	//Handles variables when a key is presed.
	public boolean keyDown (Event gameEvent, int key)
	{
 
		if(key == Event.LEFT)
		{
			keyLeft = true;
			Greenman.playerWalkLeft(true);
		}
		else if (key == Event.RIGHT)
		{
			keyRight = true;
			Greenman.playerWalkRight(true);
		}
		else if (key == 97)
		{
			keySpace = true;
 
			Greenman.playerJump(true);
		}
		System.out.println ("Charakter: " + (char)key + " Integer Value: " + key); 
		return true;
	}
 
 
}

-Player-

/* This code was produced by Kevin Spaeth.
 * Please do not use without permission.
 * Copyright May, 2011. Sp333th Productions.
 */
 
import javax.swing.ImageIcon;
import java.awt.*;
 
public class Player { 
 
		//Counters
		private int countPicture;
		private int countStep;
		private int countJump;
		//Determines Directions.
		private boolean lookLeft;
		private boolean walkLeft;
		private boolean walkRight = true;
		//Determines jumping actions.
		private boolean jumping;
		private boolean falling;
		private boolean ableToJump;
		//Provides location of all angles of a sprite.
		private int xPosLeft;
		private int xPosRight;
		private int yPosUp;
		private int yPosDown;
		private int gamexPos;
		//Images
		private Image Greenman1;
		private Image Greenman2;
		private Image Greenman3;
		private Image Greenman4;
		private Image Greenman5;
		//What is this used for?!
		private Component parent;
 
		public Player(int x, int y, Component parent) {
 
			xPosLeft = x;
			yPosUp = y;
			xPosRight = Constants.xSize+xPosLeft;
			yPosDown = Constants.ySize+yPosUp;
			gamexPos = x+Constants.xSize/2;
 
			countPicture = 0;
			countStep = 0;
			countJump = 0;
 
			ableToJump = true;
			lookLeft = false;
 
			this.parent = parent;
		}
 
		public void setImages(Image Greenman1, Image Greenman2, Image Greenman3, Image Greenman4, Image Greenman5) {
 
			//Fetches images from the Mediatracker in the Main class.
			this.Greenman1 = Greenman1;
			this.Greenman2 = Greenman2;
			this.Greenman3 = Greenman3;
			this.Greenman4 = Greenman4;
			this.Greenman5 = Greenman5;
		}
 
		//Determines if the player is moving left.
		public void playerWalkLeft(boolean value)
		{
			walkLeft = value;
		}
 
		//Determines if the player is moving right.
		public void playerWalkRight(boolean value)
		{
			walkRight = value;
		}
 
		//Determines if the player is jumping.
		public void playerJump(boolean value)
		{
			//Reset the jump counter.
			if(!jumping && ableToJump && value)
			{
				countJump = 0;
			}
 
			//Sets the value of jumping. (Can't jump if falling.)
			if(falling)
			{
				jumping = false;
			}
			else
			{
				jumping = value;
			}
		}
 
		public void playerMove() {
 
			if(walkLeft) {
 
				xPosLeft -= Constants.x_speed;
				xPosRight -= Constants.x_speed;
				gamexPos -= Constants.x_speed;
			}
		}
		public void paintPlayer(Graphics gameGraphics) {
 
			gameGraphics.drawImage(Greenman1, xPosLeft, yPosUp, parent);
		}
}

-Constants-

/* This code was produced by Kevin Spaeth.
 * Please do not use without permission.
 * Copyright May, 2011. Sp333th Productions.
 */
 
public class Constants {
 
	//Name of the Applet.
	public static final String applet_name = "GreenMan Rev. 1.01";
	//Dimensions of the game.
	public static final int applet_width = 800;
	public static final int applet_height = 600;
	//Sets the framerate.
	public static final int applet_framerate = 30;
	//Variables for player speed.
	public final static int x_speed = 3;
	public final static int y_speed1 = 1;
	public final static int y_speed2 = 2;
	public final static int y_speed3 = 4;
	public final static int y_speed4 = 8;
	//Keys to be pressed.
	public boolean keyDown;
	public boolean keyUp;
	public boolean keyLeft;
	public boolean keyRight;
	public boolean keySpace;
	//Size of Greenman (while running.)
	public final static int xSize = 75;
	public final static int ySize = 200;
 
}

Thank you to both for the timely response. I appreciate the help. To elaborate on the fact that it is "not working", I simply mean that my program is drawing where it needs to, and there are no run-time errors, it's simply not generating the keyboard imput. I put a line of code in that is supposed to return the key code if it not one of the ones i defined in the booleans.

I really don't know what deprecated means. I only have one school year of Java under my belt, and I'm trying to make this program for a simple project. I find that I'm getting lost within my own code as it becomes more lengthy, despite that I'm commenting nearly everything. If you have any suggestions on how to overcome that I'd really appreciate it.

The code is borrowed from a game tutorial website, so that's probably why it doesn't work. But I'll take a read through the "how to Write a Key Listener" article, and then check back to let you all know if i need more help. Thanks for the response.

it's simply not generating the keyboard imput.

Keyboard input usually comes from the user. I'm not sure how your program would generate it.

If its a question of the program seeing input, click on the applet to give it focus and then press some keys. It works for me using AppletViewer.