import java.awt.*;
import java.awt.event.*;
import java.net.URI;

public class MensaWecker extends Frame
  implements ActionListener {

   private Label lblWecker;
   private Button btnSpeiseplan;
   private final String webpage;

   public MensaWecker(String webpage) {
      this.webpage = webpage;
      setLayout(new FlowLayout());
      lblWecker = new Label("Aufwachen - Mittagessen!");
      add(lblWecker);

      btnSpeiseplan = new Button("Speiseplan");
      add(btnSpeiseplan);

      btnSpeiseplan.addActionListener(this);
      setTitle("MensaWecker");
      setSize(250,100);
      setVisible(true);
   }

   public void actionPerformed(ActionEvent evt) {
      try {
         if(Desktop.isDesktopSupported()) {
            Desktop.getDesktop().browse(new URI(webpage));
         }
      } catch (Exception e) {
         System.err.println("A problem happened, can't open!");
      }
   }

   public static void main(String[] args) {
      MensaWecker mw = new MensaWecker(args[0]);
   }
}