Miscellany

import java.awt.*;import java.awt.event.*;import javax.swing.*;import javax.swing.event.*;public class myJPanel extends JPanel implements MouseListener, MouseMotionListener, ActionListener, ChangeListener, KeyListener{	private Graphics g = null;	//private Timer tim;	//private int delay=1;	private int startx=0, starty=0;	private int LineThickness = 25;	private Color myColor = Color.BLUE;	private JButton btnLineThickness;	private JTextField txtLineThickness;	private Graphics drawing;	JButton b;    	public myJPanel()	{		super();				//create the timer.		//tim = new Timer(delay, this);	    //tim.addActionListener(this);	    //tim.start();				addMouseListener(this); 		setLayout(new BorderLayout());		addMouseMotionListener(this);				//line thickness box		txtLineThickness = new JTextField("Frames: 0", 10);		btnLineThickness = new JButton("Change Line Thickness");		btnLineThickness.addActionListener(this);        		b = new JButton("");		b.addKeyListener(this);	    b.requestFocusInWindow();	    		//create the new panel, and add the buttons        JPanel colorPanel = new JPanel();        colorPanel.add(txtLineThickness);                //keys		colorPanel.add(b);                //add to the panel        add(colorPanel, BorderLayout.SOUTH);        drawing = getGraphics();	}	/*****************	 * Paint	 *****************/	public void paintComponent(Graphics g) 	{				g = getGraphics();		g.setColor(myColor);    	g.fillOval(startx,starty,LineThickness, LineThickness);    	repaint();	}		/***********************	 * Regular Actions	 ***********************/	public void actionPerformed(ActionEvent event)     {		Object obj = event.getSource();				//if(obj == tim)     	//{				//repaint();     	//}	}			/*****************	 * Mouse Events	 *****************/	public void mouseDragged(MouseEvent pt)     {		startx = pt.getX();		starty = pt.getY();    }		    public void mouseClicked(MouseEvent e){}          public void mouseMoved(MouseEvent pt){}   	public void mousePressed(MouseEvent e) {}	public void mouseReleased(MouseEvent e) {}	public void mouseEntered(MouseEvent e) {}	public void mouseExited(MouseEvent e) {}	public void stateChanged(ChangeEvent event) {}		public void keyPressed(KeyEvent e) 	{		int x = e.getKeyCode();				//left arrow		if(x ==  e.VK_LEFT) 	    {	    	startx = startx - 25;	    }				//Right arrow		if(x ==  e.VK_RIGHT) 	    {	    	startx= startx + 25;	    }	   	    //Space	    if(x ==  e.VK_SPACE) 	    {	    	//code for space goes here.	    }	}		public void keyReleased(KeyEvent e) {  }	public void keyTyped(KeyEvent e) {  }}