// InputDialog, MessageDialog, if.., String.equals
import javax.swing.*;

public class Greeting extends JOptionPane
{
  public static void main(String[] args)
  {
    new Greeting();
  }

  public Greeting()
  {
    String answer = showInputDialog(this,"How are you today?");

    if answer.equals("sick") )
    showMessageDialog(this,"Sorry to hear that...")}
    else if answer.equals("fine") )
    showMessageDialog(this,"Good!")}
    else
    showMessageDialog(this,"- okay -")}

    System.exit(0);
  }

}