formdemo.java~5~

J2ME高级用户界面的学习代码

//FormDemo.java

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

public class FormDemo extends MIDlet implements CommandListener
{
  private Display display;
  private Form form;
  private Command cmdExit = new Command("Exit",Command.SCREEN,1);
  public FormDemo()
  {
    display = Display.getDisplay(this);
    /*
    Item[] items = new Item[]
    {
      new TextField("Login:","Your username...",50,0);
      new TextField("null","Your password...",50,0);
    };
    */
   Item[] items;
   items[0] = new TextField("Login:","Your username...",50,0);
   items[1] = new TextField("null","Your password...",50,0);


    form = new Form("Form Demo",items);
    form.append(new TextField("More Items","add more items",50,0));
    form.addCommand(cmdExit);
    form.setCommandListener(this);
  }

  public void startApp()
  {
    display.setCurrent(form);
  }

  public void pauseApp(){}
  public void destroyApp(boolean unconditional){}
  public void commandAction(Command c,Displayable d)
  {
    if(c == cmdExit)
    {
      destroyApp(false);
      notifyDestroyed();
    }
  }
}