listing 6-14.java

来自「这是JAVA开发大全的源代码」· Java 代码 · 共 49 行

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class GaugeInteractive extends MIDlet implements CommandListener
{
  private Display display; 
  private Form form; 
  private Command exit; 
  private Command vote;
  private Gauge gauge; 
  public GaugeInteractive ()
  {
    display = Display.getDisplay(this);
    gauge = new Gauge("Rate the movie: ", true, 5, 1);
    exit = new Command("Exit", Command.EXIT, 1);
    vote = new Command ("Vote", Command.SCREEN, 1);
    form = new Form("");
    form.addCommand(exit);
    form.addCommand(vote);
    form.append(gauge);
    form.setCommandListener(this);
  }
  public void startApp()
  {
    display.setCurrent(form);
  }
  public void pauseApp()
  { 
  }
  public void destroyApp(boolean unconditional)
  { 
  }
  public void commandAction(Command command, Displayable displayable)
  {
    if (command == exit)
    {
      destroyApp(false);
      notifyDestroyed();
    }
    else if (command == vote)
    {
     String msg = String.valueOf(gauge.getValue());
     Alert alert = new Alert("Ranking", msg, null, null);
     alert.setTimeout(Alert.FOREVER);
     alert.setType(AlertType.INFO);
     display.setCurrent(alert);      
    }
  }
}