D:

import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;


public class Snake extends Applet implements KeyListener {

    long timeS = System.currentTimeMillis();
    private Rectangle rect;
    private ArrayList<Integer> keysDown;
    private boolean isUp;
    private boolean isDown;
    private boolean isLeft;
    private boolean isRight;


    public void init(){

        this.addKeyListener(this);
        keysDown = new ArrayList<Integer>();
        rect = new Rectangle(15, 15, 15, 15);


        }

    public void paint(Graphics g)
    {
        setSize(500, 500);
        Graphics2D g2 = (Graphics2D)g;

        g2.fill(rect);

    }



    public void timer(){
        long timeS = System.currentTimeMillis();
        while(true)
        {
            if(System.currentTimeMillis()>=timeS + 1000 * 1); //Change this value to however many seconds interval you want.
            {
                move();
                timeS = System.currentTimeMillis();
            }
        }
    }





    public void move() {
        if (this.isUp==true){
            rect.setLocation(rect.x, rect.y + 10);
        }
        if (this.isDown==true){
            rect.setLocation(rect.x, rect.y - 10);
        }
        if (this.isLeft==true){
            rect.setLocation(rect.x - 10, rect.y);
        }
        if (this.isRight==true){
            rect.setLocation(rect.x -10, rect.y);
        }

    }

    @Override
    public void keyTyped(KeyEvent e) {
        if (!keysDown.contains(e.getKeyCode()))
            keysDown.add(new Integer(e.getKeyCode()));

        moveRect();



        /*
        if (e.getKeyCode() == KeyEvent.VK_UP && this.isDown != true)
        {
            this.isUp = true;
            this.isDown = false;
            this.isLeft = false;
            this.isRight = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_DOWN && this.isUp != true)
        {
            this.isUp = false;
            this.isDown = true;
            this.isLeft = false;
            this.isRight = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_LEFT && this.isRight != true)
        {
            this.isUp = false;
            this.isDown = false;
            this.isLeft = true;
            this.isRight = false;
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT && this.isLeft != true)
        {
            this.isUp = false;
            this.isDown = false;
            this.isLeft = false;
            this.isRight = true;
        }*/

    }

    @Override
    public void keyPressed(KeyEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void keyReleased(KeyEvent e) {
        keysDown.remove(new Integer(e.getKeyCode()));


    }

    public void moveRect()
    {
        int x = rect.x;
        int y = rect.y;

        if (keysDown.contains(KeyEvent.VK_UP))
            y -= 15;

        if (keysDown.contains(KeyEvent.VK_DOWN))
            y += 15;

        if (keysDown.contains(KeyEvent.VK_LEFT))
            x -= 15;

        if (keysDown.contains(KeyEvent.VK_RIGHT))
            x += 15;

        rect.setLocation(x,y);

        repaint();


    }

}