basic timeout test

package colaBot.testers;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;public class threadtest implements Runnable, ActionListener{	Thread t;		static JButton Start = new JButton("Start");	static JButton Stop = new JButton("Stop");	static JFrame ff = new JFrame("Test");		public void run()	{				try		{			Thread.sleep(30000);		}		catch(InterruptedException ie)		{			JOptionPane.showMessageDialog(null, "I was sleeping there!");			return;		}				catch(Exception e)		{			System.out.println(e.toString());		}				JOptionPane.showMessageDialog(null, "Eggs are not supposed to be green.");	}			public threadtest()	{								ff.add("North",Start);		ff.add("South",Stop);				Start.addActionListener(this);		Stop.addActionListener(this);				Stop.setEnabled(false);						ff.addWindowListener(new WindowAdapter()		{			public void windowClosing(WindowEvent evt)			{				ff.setVisible(false);				System.exit(0);			}		});				ff.setVisible(true);		ff.pack();			}		public void actionPerformed(ActionEvent e)	{			if(e.getSource() == Start)		{			Start.setEnabled(false);			Stop.setEnabled(true);						t = new Thread(this);			t.start();		}				if(e.getSource() == Stop)		{			Start.setEnabled(true);			Stop.setEnabled(false);						t.interrupt();		}			}	/**	 * @param args	 */	public static void main(String[] args)	{		new threadtest();	}}