Thread: help with KeyListener

This is the code that I have written. The goal is that if you hit the arrow keys, the dot will move whichever direction you press. What is happening is that it will draw a dot in the middle of the screen (which is what it is supposed to do), But it will not react to the key presses. What do I need to change?

P.S. I have never done KeyListeners before I only learned this much off of the internet so sorry if I am making a stupid mistake.

import java.awt.*; import java.awt.event.*;   import java.applet.*; import java.util.*; import static java.lang.System.*;   public class forum_practice extends Applet implements KeyListener,ActionListener{  	Image dot;	int x = 0;	int y = 0;  	public void init() { dot = getImage(getCodeBase(), "black.gif"); x = 100; y = 100;	}	public void paint(Graphics g) { g.drawImage(dot, x, y, this);	}	public void move(Graphics g,int x,int y){	g.drawImage(dot,x,y,this);	}	public void actionPerformed(ActionEvent e) {  	}	@Override	public void keyPressed(KeyEvent e) {	if(e.getKeyCode()==37){	x-=10;	move(x,y);	}	if(e.getKeyCode()==38){	y-=10;	move(x,y);	}	if(e.getKeyCode()==39){	x+=10;	move(x,y);	}	if(e.getKeyCode()==40){	y+=10;	move(x,y);	}	}	@Override	public void keyReleased(KeyEvent e) {  	}	@Override	public void keyTyped(KeyEvent e) {	// TODO Auto-generated method stub  	}   }

Alright so here is my modified code. It now does what I wanted but there is a white flash every time it moves, and you can only see the dot on like every tenth move. How can I make the animation smooth?

import java.awt.*; import java.awt.event.*;   import java.applet.*; import java.util.*; import static java.lang.System.*;   public class forum_practice extends Applet implements KeyListener{  	int x = 0;	int y = 0;	byte direction;	final byte UP = 1;	final byte RIGHT = 2;	final byte DOWN = 3;	final byte LEFT = 4;  	public void init() { x = 100; y = 100; addKeyListener(this);	}	public void paint(Graphics g) {	g.setColor(Color.black);	g.fillOval(x, y, 10, 10);	run();	}	public void run(){	try {	Thread.sleep(100);	} catch (InterruptedException e) {	// TODO Auto-generated catch block	e.printStackTrace();	}  	if(direction==UP){	y-=10;	}	if(direction==DOWN){	y+=10;	}	if(direction==LEFT){	x-=10;	}	if(direction==RIGHT){	x+=10;	}  	repaint();    	}	@Override	public void keyPressed(KeyEvent e) {	if(e.getKeyCode()==37){	direction = LEFT;	}	if(e.getKeyCode()==38){	direction = UP;	}	if(e.getKeyCode()==39){	direction = RIGHT;	}	if(e.getKeyCode()==40){	direction = DOWN;	}	repaint();	}	@Override	public void keyReleased(KeyEvent e) {  	}	@Override	public void keyTyped(KeyEvent e) {	// TODO Auto-generated method stub  	} }