/* Bill Marty's Java "Hello World" for iDEN phones. */

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

interface Constants {
   public static final boolean
      DEBUG_ON = true;
}

public class Hello extends MIDlet {

   private Display myDisplay;  //A reference to the physical display.
   private Form basicForm;     //Stuff I want to show on the display.
   private Command exitCommand, moreCommand;
   private MyListener myCommands;

   public Hello(){

      //Get the reference to my display object.
      myDisplay = Display.getDisplay(this);

      //Set up the soft keys.
      exitCommand = new Command("EXIT ", Command.EXIT, 2);
      moreCommand = new Command(" MORE", Command.SCREEN, 2);

      //Instantiate command listener.
      myCommands = new MyListener();

      //Form is derived from Screen - the basic display mechanism.
      basicForm = new Form("Hello World");
      basicForm.append("Hi Bill!\n");
      basicForm.addCommand(moreCommand);
      basicForm.addCommand(exitCommand);
      basicForm.setCommandListener(myCommands);
      Debug.print("Hello constructed.");
   }

   private class MyListener implements CommandListener{
      //React to soft key(s).
      public void commandAction(Command c, Displayable d) {
         if(c == exitCommand) {
            Debug.print("Exit Soft Key!");
            //System.exit(0);
            destroyApp(false);
            notifyDestroyed();
         }
         if(c == moreCommand) {
            basicForm.append("You want more!?\n");
            Debug.print("MORE soft key pressed.");
         }
      }
   }

   // These are required to override abstract methods of MIDlet.
   public void startApp(){

      //Show my Form.
      myDisplay.setCurrent(basicForm);
   }
   //No actions needed.
   public void pauseApp(){}
   public void destroyApp(boolean unconditional){}
}

class Debug implements Constants {
   static void print(String s){
      if(Constants.DEBUG_ON == true) System.out.println(s);
   }
}