主题：程序代码——可以调节的Gauge

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.midlet.MIDlet;

public class Exec extends MIDlet implements CommandListener {
        Display display;
        Form form = new Form("表单");
        Gauge g = new Gauge("示例", true, 10, 5);
        Command start = new Command("开始", Command.OK, 1);

        public Exec() {
                display = Display.getDisplay(this);
        }

        public void startApp() {
                form.append(g);
                form.addCommand(start);
                form.setCommandListener(this);
                display.setCurrent(form);
        }

        public void commandAction(Command c, Displayable s) {

        }

        public void pauseApp() {
        }

        public void destroyApp(boolean unconditional) {
        }
}