import java.awt.Toolkit;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JOptionPane;
import javax.swing.JFrame;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

public class Reminder {
	
  Toolkit tester;
  static String stringInput;
  Timer time;
  public Reminder(int seconds) {
    tester = Toolkit.getDefaultToolkit();
    time = new Timer();
    time.schedule(new MediR(), seconds * 1000);
  }

  class MediR extends TimerTask {
    public void run() {
  	  JOptionPane.showMessageDialog(null, "Time to take " + stringInput);
      tester.beep();
    }
  }

  public static boolean isNumeric(String str)  
  {  
    try  
    {  
      double d = Double.parseDouble(str);  
    }  
    catch(NumberFormatException nfe)  
    {  
      return false;  
    }  
    return true;  
  }
  
  public static void main(String args[]) {
	  JOptionPane.showMessageDialog(null, "This is a program that will ask for a medicine and remind you when to take it.");
	  stringInput = JOptionPane.showInputDialog("Enter Medicine: ");
	  String i;
	  i = JOptionPane.showInputDialog("Enter Time to wait: ");
	  while(isNumeric(i) == false)
		  i = JOptionPane.showInputDialog("Invalid input. Please enter again: ");
	  new Reminder(Integer.parseInt(i));
	  System.out.println("Task scheduled.");
  }
}