Button Test - increasing numbers

import java.awt.*;

public class ButtonTest extends Frame
{
   Button h;
   TextField t;
   int value=0;

   public ButtonTest ()
   {
      setTitle("ButtonTest");
      add("North", new Label(""));
      add("South", new Label(""));
      add("East", new Label(""));
      add("West", new Label(""));
      Panel p = new Panel();
      p.setLayout(new GridLayout(2,1));
      p.add(t=new TextField());
      p.add(h=new Button("Count From Zero"));
      add("Center",p);
   }

   public boolean action (Event evt, Object obj)
   {
      if (evt.target.equals(h)) t.setText(t.getText()+value++ +" ");
      return (super.action(evt,obj));
   }

   public static void main (String arg[])
   {
      ButtonTest hello = new ButtonTest();
      hello.resize(500,150);
      hello.show();
   }
}