// MyButtonListener.java

import java.awt.event.*;

public class MyButtonListener implements ActionListener
{
	public MyButtonListener()
	{
	}

	public void actionPerformed(ActionEvent ae)
	{
		veryLongProcess();
	}

	public void veryLongProcess()
	{
		try
		{
			// なが〜い処理
			Thread.sleep(3000);
		}
		catch(InterruptedException i_ex)
		{
			i_ex.printStackTrace();
		}
	}
}