如何在J2ME中创建浏览器窗口？

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.Player;
import javax.microedition.media.Manager;

public class MyMIDlet extends MIDlet implements CommandListener {

    private Display display;
    private Form form;
    private Command exitCommand;
    private Command openBrowserCommand;
    private Browser browser;

    public MyMIDlet() {
        display = Display.getDisplay(this);
        form = new Form("My Browser");
        exitCommand = new Command("Exit", Command.EXIT, 0);
        openBrowserCommand = new Command("Open Browser", Command.ITEM, 0);
        form.addCommand(exitCommand);
        form.addCommand(openBrowserCommand);
        form.setCommandListener(this);
    }

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

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
        notifyDestroyed();
    }

    public void commandAction(Command c, Displayable d) {
        if (c == exitCommand) {
            destroyApp(true);
            notifyDestroyed();
        } else if (c == openBrowserCommand) {
            try {
                browser = Browser.getBrowser();
                browser.setCurrentURL("http://www.example.com");
                browser.setVisible(true);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}